Showing posts with label water quality. Show all posts
Showing posts with label water quality. Show all posts

Tuesday, January 18, 2011

Drinking Bottled or Filtered Water Could Increase the Risk of Tooth Decay

In today's edition of the Washington Post Juliet Eilperin writes that limiting the consumption of tap water could - by cutting yourself off from what is the primary source of fluoride for the vast majority of Americans - result in a greater risk of tooth decay and cavities.

Friday, November 12, 2010

Water Sanitation Begins at Home


After spending two years working to develop water and wastewater infrastructure in Mali, I have been back in New York for two months and have learned to see the place that I call home in a brand new light. People often ask me how I am adjusting back to America, and if I don’t have time for a real conversation I tell them “It’s really cold!” or “I really enjoy going to the supermarket!” But if you have the time to listen, I would like to share with you how after everything I’ve seen and done in the most underdeveloped corners of Africa, being back in America is in some ways quite unsettling – I would be dishonest if I didn’t tell you that I am thoroughly disappointed with my local tribe and clan.

In Mali I lived amongst a society of isolated, impoverished, unlettered farmers who have spent the past however-many millennia suffering and dying from completely preventable giardia and dysentery. I would go to a Minianka family’s house and see that they arranged their compost pile full of donkey manure only a few meters from the uncovered well from which they drew all of their drinking water, or that they had dug their well on one side of a mud-brick wall and that on the other side of that wall the neighboring family had built a latrine. I will admit that in moments of weakness I sometimes succumbed to pejorative views of the local culture – I thought that my community’s nonchalance, disinterest and at times visceral resistance to modern methods of sanitation were exclusive to the Minianka tribe. I would share these frustrations in letters to my friends back home and they would express their disbelief; one wrote back “My dog and your cat understand that they shouldn’t shit in their drinking water – how is it that these people haven’t figured out such a basic instinct of animal survival?”

Now that I’m back in America I can rest assured that the people of my home country aren’t simply pulling down their pants and defecating in the streets like many did in Sanadougou, and just about everyone in New York can tap water from groundwater wells or municipal water grids with indoor plumbing systems in the comfort of their kitchens. But apparently even in the supposedly-developed West, in the wealthiest corners of the wealthiest states in the wealthiest country in the history of human civilization, even my fellow tribesmen have yet to act on the basic truth that my friend’s dog and my cat grasped so well.

This rude awakening came to my attention when I visited my friend at her home here in South Salem, New York and asked for a drink of water – and she proceeded to take a bottle of Poland Spring out of the refrigerator.

“That’s not necessary – I prefer tap water.”

“No, actually it is necessary.” my friend explained, “Our tap water is unpotable!”

I was dumbfounded. “You mean to tell me that I just spent two years working to bring potable drinking water to an obscure tribe in a remote corner of Africa – but here in New York we can’t drink the water?”

“I’m afraid so. Give it a taste.”

I filled a glass with water from the sink, took a sip and spit it out in disgust. “This water is so salty it tastes like contact lens solution!”

“That’s because our chloride levels are off the charts! I’m pretty sure that it’s because in 2008 the Town of Lewisboro discontinued the use of sodium chloride to de-ice the roads during the winter, so beginning in the winter of 2008-2009 they started using magnesium chloride under the reasoning that it is less harmful to the environment. However, magnesium chloride is only half as effective in reducing ice as sodium chloride – so they had to use twice as much.”

She pointed out the window, “If you see right there – that’s our well, and it’s only a few meters away from the road. So when the snow and ice melt, much of the magnesium chloride flows downhill as runoff and then percolates down to the groundwater – the groundwater our well pumps up as our drinking water. Our chloride levels went through the roof – that’s why our water is so salty! ”


My friend explained that she started going to the supermarket to buy bottled water in bulk – but she needed to transport such an unwieldy mass of water every week, soon she found herself having to go to the supermarket every three or four days that she and her husband realized that they needed a more practical long-run solution. They signed up for Nestlé Waters to deliver five 5-gallon bottles of Poland Spring to their door every month for $39.95. Even though they are paying taxes to the Town of Lewisboro to ensure clean water – and de-ice the roads – they also to pay $479.40 every year to Nestlé Waters in recurring water expenses.


My friends in South Salem have to use Poland Spring not just every time that they want to drink a cup of water, but every time they make a pot of coffee and every time they cook spaghetti and every time they brush their teeth. Their dishwasher was leaving white saline residues on their dishes, it was corroding their stainless steel knives – and dishwashers can only operate with tap water, so if they didn't buy a water softener they would have to do their dishes by hand with Poland Spring.

The tap water is so salty here in this neighborhood that it can only be used for bathing, washing clothes, flushing the toilet and irrigating the lawn and garden. Though in all fairness, perhaps the drinking water supply in South Salem is not as bad as the foul wells my erstwhile neighbors drank from in Sanadougou in that at least it isn’t soiled with fecal matter. But that’s a lot more than they can say in Amherst, Massachusetts…

I recently drove up to my old college town to say hello to some old friends, including my Professor Jessica Wolpaw Reyes. If there is anyone in America who understands the value of clean water, it would be Professor Reyes; she is an economist specializing in the niche subjects of environmental economics, the economics of water and health and how these subjects intertwine. In fact, she has been making waves with a seminal paper in which she linked the levels of lead in the drinking water to crime rates. Her latest research is concerned with the adverse health effects of plastic packaging of food and beverages.

When I arrived at the Reyes’ household, I was surprised to watch my Professor open up the fridge and serve her kids from a plastic jug of Poland Spring. “Isn’t the conclusion of your next paper that we should stop drinking plastic-bottled water?”

“Yes, it is pretty terrible and I would certainly prefer not to, but my choices are limited. The town just discovered E. coli and fecal coliform in the drinking water, so unless I am going to boil or chlorinate every last drop of tap water we use to drink and cook and clean the dishes – which is quite impractical, frankly – I have no choice but to buy bottled. As much as drinking from plastic bottles might cause some forms of disease in the long run, at least it won’t cause immediate gastroenteritis…”

“… So you’re telling me that the municipal drinking water supply is contaminated with fecal matterhere in Amherst, Massachusetts…?”

“That’s precisely what I’m telling you. If you thought that these problems were exclusive to Africa, then you have a lot to learn about the sorry state of water policy in America.”

It turns out that the presence of E. coli and coliform in the Amherst water supply was probably fostered by three successive water main breaks over the course of October. Since these breaks were located fairly close to the water treatment plant they leaked vast quantities of chlorinated water, and as chlorine kills bacteria and microorganisms it breaks down itself, so as the newly-chlorinated water was flowing out of the broken mains chlorine levels in the later segments of the municipal water grid dropped to such low concentrations that E. coli and fecal coliform cultures could flourish unabated.

Just as a chain is only as strong as its weakest link, the quality of water provided by a given plumbing system is only as reliable as its weakest pipe. All there needs to be is one single pipe which over the years (or only months) of chemical or physical duress has degraded to such a degree that it can no longer withstand the pressure of the water being pumped through it; eventually cracks form and the pipe will begin to leak. The pressure at the end of a hydraulic system is contingent on there being a constant volume of water inside, so if water is coming out at multiple apertures, pressure will drop accordingly. If there’s just a tiny little trickle at the end of a remote line, water pressure will reduce somewhat and water quality will decline – but in the grand scheme of things that’s not so terrible. What’s terrible is when a plumbing system has cracked in so many places or there’s one break so big that water is gushing out in such massive volumes that the pressure of the hydraulic system plummets so low that it becomes negative.

Negative pressure means that instead of pushing out the hydraulic system will be sucking in – usually air, which leads to rust buildup. This is what happened with the solar water pump-to-tap system we renovated in Sanadougou; the pipes were so damaged that water pressure was usually so insufficient that one could hardly get any water from the taps, and when the water did come it was so discolored and bad-tasting that no one wanted to drink it. If a plumbing system marked by leaking pipes and negative pressure were surrounded by nothing but air, it would probably be contaminated with only iron, manganese and iron bacteria – which is certainly bad, but it’s not the superlative worst thing that could happen to the water supply.

Off the top of my head, I can’t think of any kind of water that I would be less enthusiastic about drinking than water contaminated with fecal matter. Writing from personal experience, take it from me that E. coli, coliform, giardia cysts and amoebas rank among the bottom of things that you ever want to down in your water glass. Okay… Vibrio cholerae would be worse – though I have no personal experience with cholera to serve as a reference point… Mercury, selenium, plutonium would be much worse – but these kinds of high-tech pollution are fairly complicated, and to be frank we Americans are nowhere near close to mastering even the basics of sanitation so for now I’ll just stick to the fundamentals; e.g. how to keep shit out of our drinking water supply.

Likewise, the most immediate problems of water sanitation are related to the fact that the water mains transporting potable drinking water from the treatment plant aren’t the only pieces of infrastructure that break. Just as water mains corrode and crack, so do the outflow pipes transmitting blackwater from toilets and greywater from sinks and washing machines and dishwashers to the municipal wastewater treatment plant. Or in low-density communities where wastewater is disposed via decentralized septic tanks and leach fields, a household’s sewage is jettisoned directly into the soil under the assumption that the wastewaters will be transmitted in such modest volumes that the soil will have the capacity to remove all of the impurities and the wastewaters can eventually merge with the groundwater without contamination.

However, all too often the effectiveness of a septic system is grossly overestimated or plots of land are subdivided and a neighborhood becomes exponentially denser with no commensurate improvement in wastewater infrastructure, and as the inadequate wastewater infrastructure is overused the ground becomes supersaturated with sewage.

If the water table is high and the capacity of the septic systems is insufficient for the population, then the groundwater will probably be contaminated with sewage and all of the dangerous bacteria and microorganisms that come with it.

This was precisely the case in the community built around Peach Lake in nearby North Salem. The oldest houses along the shore of Peach Lake date back from the 1900s, 1910s and 1920s when this community was just a small cluster of wealthy Manhattanites’ summer cottages – and when these oldest houses were built a century ago they were equipped with small septic tanks intended to be used only a few months every year. Though by the 1950s the sprinkling of summer cottages along Peach Lake had developed into full-blown suburban neighborhoods with more than 700 homes inhabited year round, they had grown to such a size and density that they really needed a municipal sewer system and a wastewater treatment plant – but all of the residents of this lakefront community were still disposing of their sewage with miniscule septic tanks meant to service the occasional Coolidge-era vacationer.

Lakefront communities are almost by definition situated on top of extremely high water tables – and Peach Lake was no exception – so all of their raw sewage was overloading the soils and contaminating the groundwater which in turn flowed to the lake. And eventually the pollution had built up so badly that by the 1970s Peach Lake had become a veritable cesspool; phosphorus levels were so high that algae blooms choked off the rest of the aquatic ecosystem, bacteria counts were so high that the town of North Salem had to forbid swimming and close the beaches.

If this kind of water pollution had happened to just any old pond, that would be pretty bad for the ecology of the pond and the health of the families in its immediate vicinity; however Peach Lake is not just any old pond – it’s a part of the Croton Watershed which contributes to the system of reservoirs which provide the supply of drinking water for New York City.

Consequentially speaking, the sanitary practices of my fellow New Yorkers in North Salem were really no better than those of the Haitians who are shitting upstream and drawing their drinking water downstream in the same Artibonite River. The only reason why people in the Bronx and Manhattan aren’t suffering from a cholera outbreak like there is now in Port-au-Prince is that the NYC Department of Environmental Protection operates what is one of the grandest water treatment systems ever established in the history of human civilization.

But I digress – back to water mains. A broken water main per se is such a grave threat to public health because a disruption in the supply of treated water can disrupt the chemical equilibrium throughout the rest of the entire water grid, and if chlorine levels fall like they did in Amherst this past October then the quality of the water in the main is free to return to its natural state i.e. full of bacteria. But keep in mind that if so much water is being lost that the pressure is not just low but negative, the hydraulic system is going to suck in whatever matter it can in the immediate vicinity of the break. Maybe the hydraulics will only suck in oxygen – not the end of the world. But imagine what happened when water mains inevitably broke around Peach Lake in North Salem…

Most households connected to a municipal water system are also connected to a municipal sewer system. When crews of masons and pipefitters and plumbers build one set of pipes, they usually build the other along the same routes because it is the most efficient method of construction. Hence it would be more than fair to say that most water pipes are built in the same neighborhoods as each other – usually they are built one on top of the other. Without proper maintenance, water pipes break. Without proper maintenance, sewer pipes break. And thus without proper maintenance, the water mains which were built to bring potable drinking water to its consumers can break and develop negative pressure and suck in raw, untreated sewage.

This scenario is more than just a hypothetical possibility; seeing that water pipes are generally laid in the same places where sewer pipes are laid – or septic systems, or storm drains or fire hydrants where dogs defecate, or fields enriched by organic fertilizer, or woods where wild animals lay their droppings – it would be fair to assume that any significant water main break is going to lead to some form of contamination of the water supply at least downstream from the aperture. This happens all the time in towns and cities far and wide in every region and climatic zone…

...from Los Angeles...

...to Seattle...

...to Cleveland...

...to Baltimore...

...to Hoboken...

...to Staten Island...

...to Bleeker Street...

I cannot emphasize enough that every time a water main breaks like this – even when it doesn’t rupture with such sensationalist bravado – it carries grave implications for public health. A broken water main isn’t like a pothole in the street; it’s not a nuisance that we can just deal with until the next scheduled maintenance. Every time that a water main breaks, at least the portion of municipal drinking water supply downstream from that main should be considered as though it is contaminated with sewage. When you see a water main break in the United States of America, that means that everybody who depends on this system for drinking water is now at risk for the sort of waterborne diseases that you would expect to see in some Third World country – because when our massive water systems malfunction we might as well be drinking from some fetid hole in the ground. Every time that a water main breaks it is in all probability not just a freak occurrence – it is most likely an indication that the entire water and wastewater infrastructure upon which that populations depends is old and decrepit and that it has probably been grossly neglected and shortchanged of tens of billions of dollars and however many decades of necessary repairs.

So think of the ramifications that decrepit infrastructure led to in a small town like Amherst or North Salem and try to imagine how those problems could intensify and cascade in a much larger, more densely-populated metropolitan area of multiple millions of people. A good case study would be to see what happened this last May when a 10-foot wide underground water main connecting the Quabbin Reservoir to the municipal water system serving Boston and its suburbs ruptured in Weston, Massachusetts. To call this a “leak” would be an understatement – the broken main was dumping 8 million gallons of water into the Charles River every hour for 8 hours until the Massachusetts Water Resources Authority was able to shut the valve and cap the flow.

Governor Deval Patrick issued a state of emergency and boil water orders for over 2 million people in 30 communities; “This water is not safe for drinking” he declared. Mayor Thomas Menino also issued a state of emergency in Boston, alerted residents about the boil water order through the city’s reverse-911 system, distributed fliers and sent police officers to the streets declaring the boil water orders with bullhorns.

Unlike in Amherst where a boil water order was an inconvenience, in a densely-populated metropolitan area the size of Boston this was a full-fledged public crisis. Even if the city and the state issue boil water orders, this is not an option for the hundreds of thousands of Boston residents who don’t have functioning stoves or students who aren’t allowed to have hot plates in their dormitories. Not only private households but businesses were not able to function without immediate access to tap water; for restaurants, hotels, movie theaters and baseball stadiums that need water as an input in the food and beverages they sell, which have to be able to serve food and beverages at a certain temperature in large quantities, boiling water was simply impractical. The only way that people could go about their daily life was by stockpiling bottled water.

But the fact of the matter is that the free market in commodified bottles of water – in all of its efficient glory – has proved unable to meet the demand for potable drinking water. Living off of bottled water might be feasible in a small town like South Salem or even a large town like Amherst, but only because these are communities where the majority of residents are either college students whose respective schools provided for bottled water supplies in their dining halls and dormitories or they have cars and can drive down the road to a shopping center. Even if the local Stop N’ Shop is sold out of Poland Spring, those with cars can just drive to the supermarket in the next town over beyond the boil water order zone. Though in a city like Boston where the majority of residents don’t have cars and the T doesn’t go anywhere beyond where the boil water order was in effect, the stocks of bottled water sold to supplement the municipal tap system were too modest to supply the entire metropolitan population of 2 million. Stores were even sold out of sparkling water! Bostonians had to resort to brushing their teeth with seltzer! Bottled water was in such short supply that Governor Patrick had to call up the Massachusetts National Guard to deliver emergency drinking water supplies.

Bottled water has its virtues; it’s convenient, it carries the dependability of any brand-name consumer item, and it’s cheaper in the short run than investing in the durable infrastructure necessary to make tap water potable. Professor Reyes – as much as she’s against it – drank Poland Spring for the duration of Amherst’s boil water advisory. Some households – like my friends in South Salem – have given up on tap water entirely and have been drinking bottled water exclusively for years now. But as individuals and moreover as a society, we really cannot afford to rely on bottled water for our long term needs. I’m not even addressing the environmental costs of generating so much unnecessary plastic waste; to subscribe to Nestlé Water’s home delivery services, one has to pay a deposit of $20 for the dispenser – $22 for the stainless steel model, one has to pay the continued subscription costs of $32.96 for three, $39.95 for four, or $46.80 for five 5-gallon bottles of Poland Spring delivered to your doorstep every month. A year’s supply of home-delivered Poland Spring for a family of four would cost $581.60 – plus taxes. For a family with two professional-salaried breadwinners, $581.60 isn’t going to break the bank. But for a middle class family that makes $50,000 a year, the $581 of bottled water would add up to 1.7 percent of their total household budget – that’s a significant sum of money. In comparison, the Bush tax cuts of 2001 saved a family making $50,000 per an average of $1,825 each year.

My cousins Bob and Jane in Stamford, Connecticut have had chronic water problems with the water in their house that is pumped from their 50-year-old well; the water is turbid and acidic and it is full of high levels of iron, iron bacteria, manganese, nitrates and chlorides. They technically can drink their tap water – it is potable – but the water looks opaque, it tastes terrible, the chlorides are corroding the pipes and Bob’s doctor thinks that the high iron levels might be the cause of his blood pressure problems. So for 21 years they have been subscribing to Poland Spring’s home delivery services for the total cumulative cost of more than $12,000.

But recently Bob and Jane decided that enough was enough and they are now hiring plumbers to install a brand new well storage unit for $1,800 and a water softener for $2,800. “Wells were never meant to last forever – to just keep putting and putting this off is sheer insanity!” Bob explains, “It’s costing me an arm and a leg, but compared to what bottled water costs these investments are actually quite reasonable.”

We as a people have to start approaching our national crisis of inadequate water infrastructure the same way as my cousins Bob and Jane addressed the problem with their well and realize that it’s not a matter of paying or not paying. The choice we have to make is whether we are going to pay indefinitely for the damage caused by dilapidated water systems and tremendously expensive band-aids – or whether we are going to address the root of the problem and invest in durable water infrastructure so we can have clean drinking water now and save money and improve our economy in the long run.

Back to North Salem, after decades of environmental consultations and town meetings and board resolutions the communities around Peach Lake are finally getting the wastewater infrastructure that they need. Last year Congressman John Hall was able to secure $7 million of funds from the American Recovery and Reinvestment Act to pay for the construction of neighborhood sewage collection systems, a pump station and a treatment plant.

“Funding clean water infrastructure is a smart investment that will help protect public health and create long term value for years to come. This project will create local jobs and reduce the burden on local property taxpayers” Congressman Hall explained, “When I cast my vote earlier this year for the American Recovery and Reinvestment Act, this is exactly the kind of investment that I knew we needed in the Hudson Valley.”

We need to implement this kind progressive clean water agenda on a national scale. Our water infrastructure is falling apart because much of it dates back from before the Roosevelt administration – the Theodore Roosevelt administration. Especially in older cities like Boston, New York, St. Louis and Chicago many of the water mains and sewer pipes date from the Civil War era. Almost everywhere we need to step up monitoring, maintenance and basic repairs, but in many places after more than a hundred years of use and neglected maintenance the infrastructure has degraded so badly that it is beyond the point of no return. Here in Westchester County, much of the Croton Watershed which provides New York City’s drinking water supply dates back to its original construction in 1842 – in some places, the population of Manhattan’s drinking water is still transported via wooden aqueducts. Assuming that technology might have improved after a hundred years or so, the mere upkeep of antediluvian infrastructure will not suffice for our present needs. If we are to have a functioning society and economy we have to build significant swaths of our grids anew and lay brand new water mains and sewer pipes and construct treatment plants utilizing modern 21st century technology.

There are some members of Congress and elements of this administration who do understand the gravity of our inadequate water systems and who have begun to take action to finally invest in the modern infrastructure that we need. Though experts on these matters are contending that the Obama administration’s actions thusfar have been a good start – but nowhere near enough to repair, replace and modernize all of our corroded water mains, decrepit sewers and obsolete treatment plants. In 2002 the Environmental Protection Agency released a report estimating that the United States will have to spend as much as $390 billion over two decades simply to replace outdated wastewater infrastructure systems and replace them with new ones. In 2008 the Agency reported that the nation’s publicly-owned water treatment plants alone needed roughly $202.5 billion worth of investment. The American Society of Civil Engineers goes even further and estimates that in order to simply maintain our current levels of sanitation and drinking water quality we will need to invest $255 billion in our water and wastewater infrastructure – $109 billion more than currently-projected outlays – just over the course of the next five years. These numbers might sound staggering, but when you consider that over the past decade Congress has allocated $751 billion in emergency spending measures to fund the war in Iraq and $336 billion for the war in Afghanistan, an additional $109 billion in emergency spending to fund critical investments in our water and wastewater infrastructure in America actually seems quite modest.

As the 112th Congress convenes in January and begins what is certain to be a long, drawn-out budget showdown, lawmakers would be wise to heed the advice of the Environmental Protection Agency and the American Society of Civil Engineers and provide for increased spending on water and wastewater infrastructure. Understandably, this is a time when public officials are going to have to make tough choices between tax cuts, military bases, schools and roads – and water and wastewater infrastructure might unfortunately take the cut because the very most public of public goods doesn’t have a constituency as well-organized as the Oil Lobby, the Farm Lobby or the Defense Contractor Lobby. But unlike tax cuts for millionaires or the next generation of nuclear weapons, we don’t have a choice as to whether or not we are going to pay for our water systems.

We can choose to pay to maintain and repair and modernize our infrastructure now when it’s merely expensive, or we can choose to pay for our infrastructure later after all of our sewage treatment plants have collapsed and all of our drinking water systems are contaminated with fecal matter and all of our infrastructure is so unsalvageable that we have to replace everything from scratch – then it’s going to be really¸ really, really expensive. Paying for adequate maintenance is an incredibly more frugal policy than putting it off until we have to pay for more expensive repairs, paying for repairs is likewise more frugal than just letting systems collapse and having to pay for unnecessary new construction. I cannot emphasize enough that the rationale for investing in water infrastructure now as opposed to later is inherently conservative in nature. This goes out to all of you who can't stand wasteful spending; if we don’t invest in necessary public infrastructure, can you imagine how much more the American people would have to spend on Poland Spring home delivery? If you think that Medicare, Medicaid and Obamacare are expensive now, can you imagine what the costs would be like when the American people are suffering from endemic gastroenteritis and giardia and dysentery?

Back in Sanadougou, my friends in the Minianka tribe stoically accept these waterborne diseases and the ensuing poverty and misery and death that define their lives as simple facts of life. When the Peace Corps sent me to live amongst them, my role in this foreign society was to shine a light on these problems that no one wanted to talk about, to connect the dots between the causes and the symptoms, and to show the Miniankas that if only they open their minds to change and invest the time and resources necessary to obtain clean water, then we could completely and thoroughly prevent all of this disease and stagnation from ever existing in the first place.

And now that I am back home, I think that my role in my own society might be more or less to same – though maybe it might be more complicated as my countrymen seem to think that the sheer mass of our GDP or our military might somehow set us apart from the basic facts of pathology. Indeed, we might have advanced computer technology and a developed commercial economy centuries and millennia ahead of Haiti, Kenya, Afghanistan or Bangladesh – but that doesn’t make the American people immune from the same bacteria and parasites that are keeping the various cultures of the Third World mired in disease and poverty. The presence of these contaminants in our drinking water does not have to be a fact of life, we can very easily change our practices and improve our infrastructure without sacrificing our cultural heritage and without breaking the bank, but with the same combination of obtuseness and reckless pursuit of absolute convenience, we – like the Miniankas who refuse to wash their hands with soap – act as though we are content with living amongst our own filth. I can forgive the Miniankas for their inadequate sanitation so long as they can plead ignorance to the science of disease transmission; I cannot extend that same generosity to my fellow Americans.

Do we in America really live in an incomparably advanced civilization? Are our ways in fact superior to the Germans, the Russians, the Chinese, the Indians… the Miniankas? Or are we just conceited by the intoxicating sophistry of American exceptionalism?

I think that in evaluating the relative greatness of a society, a good place to start would be to analyze the development of their sanitation practices and infrastructure. Upon this rude awakening to the realities of our water policy in America, I cannot help but share the sentiments of my late Grandpa Leon who used to shake his head and conclude, “We’re still swinging from the trees”. Though I would like to hold out hope that my people will be able to evolve in our ways – perhaps to the level of my friend’s dog or my cat – and that one day we will finally begin to keep our shit out of our drinking water.

Monday, March 15, 2010

Floccing Shit



Madu Bigmeat: So things are going fairly well with my newest round of latrines and soak pits… But I dunno, James Brown II… should I be focusing the whole time on wastewater management? Should I return to teaching people how to treat their well water?

James Brown IV: Sorry man, I think you’ve got us cats confused!!! I’m the fourth James Brown you’ve had hanging round this gwa!

Madu: James Brown IV?!?!?! Damn, son. I’ve been going through you cats so fast that I’ve lost track.

James Brown IV: Whatchoo talkin’ bout, Madu?

Snoop Dogg: I think you should break him the bad news, being his master and all.

Madu: You see, James Brown IV, due to the low content of vitamins and minerals in a diet of millet goop and peanut oil, the townsfolk of Sanadougou are suffering from acute malnutrition – especially the children. One of the most important things which Malians are lacking from their diet in sufficient quantities is protein. And so, James Brown IV, it is quite common for my malnourished neighbors to hunt other people’s cats when they wander around at night– hence the suffix after your last name.

James Brown IV: But… but… why?!?! Why would anyone want to eat a cute little kitten like me? There’s hardly any meat on these bones!!!

Madu: You’re right, but the fact that there is meat on those bones – and not enough of it on the bones of all the children here in Mali. That’s why you’re inevitably going to get eaten.

James Brown IV:
Inevitably?!?!?!

Mdu: Yeah, the fact of the matter is that all animals raised in this society – whether they be cows, goats, chickens, dogs or cats – are eventually destined for the food bowl. It’s been hard, but I’ve come to terms with this. And I’ve come to accept that both of you will also one day be eaten by my malnourished neighbors… though in the meantime, I’m going to give you all the tender love and care that I can.

Snoop: That’s the truth, fo’ sure!

James Brown IV: If only it didn’t have to be like this!!! If only!!!

BrzzzzzzzzZZZZZZZZZZZZZZZZZAAAAAAAAAAPPPPPPPP!!!!!!!!!!!



Al Gore: There is in fact logic to that assertion, for it in indeed possible to address the root cause of this pet-eating behavior amongst the local populace.

Madu: Al Gore!!!! What in tarnation are you doing here?!?!?! There is no way that your academic brainpower can solve this problem.

Al: Your claim is lacking in foundation, for there exist sound methods of improving the nutritional content of the typical Malian diet and therefore obviating the demand for feline and canine proteins.

Madu: Shove it up your converter box, Al. There simply isn’t enough water to grow any food here in substantial quantities beyond millet and peanuts. And if anyone gets their hands on any money, they’re going to blow it on tea and sugar and toys. Unless you’ve got a solution that requires no water and no money, then it’s not going to fly.

Al: There are in fact a multitude of species of plants edible to humans and possessing a plethora of nutritious elements which can be grown in environments with little to no water. For example, one such species, among the most promising of crops to be disseminated for the objective of improving nutrition in the developing world, is the Moringa oleifera – a tree native to the foothills of the Indian Himalayas commonly known as the “moringa”.



For millennia Indians have eaten the pods of the Moringa – which they call “saragwa” and is consumed fried and in sanbars and curries. In addition, the moringa leaves can be cooked like spinach and are even more nutritious, containing significant amounts of Vitamin A, Vitamin C, protein, calcium, iron, phosphorus and potassium. If each Malian child were to drink a serving of moringa leaves crushed into powder and stirred with water into a beverage – perhaps with a little sugar or lemon for taste – it would be the nutritional equivalent to eating an orange, a carrot, a banana and drinking a glass of milk.

James Brown IV: So you’re saying that if these kids eat these leaves, they’ll have their protein and won’t want to eat my cute little self?

Al: Well, there is no certainty that Moringa oleifera alone can serve as a causal factor in such a momentous behavioral change; however, if this species could be cultivated to such an extent that the present nutritional deficiencies in Malian culture were abated then it is reasonable to surmise that the demand for feline protein would reduce significantly.

Snoop: And dogs?

Al: Yes, improved nutrition would probably reduce the demand for canine protein as well.

Snoop: Y’know, I think this solar panel pinhead over here’s got some sense in him. Everyone here eats their toh with baobab leaves in the sauce – adding moringa leaves wouldn’t be such a big change in their habits!

Madu:
Okay, so this tree’s nutritious – I get it. But why should people farm these trees to eat the little leaves and pods when they could grow oranges and bananas and carrots instead?

Al: Unlike all of the crops which you just mentioned, moringa is a relatively easy and cheap crop to cultivate. After sugarcane, oranges, bananas and carrots are amongst the most water-intensive crops that are grown in this country – and in addition to intensive irrigation during the dry months and even during rainy season, they require much intensive fertilization and maintenance. Oranges and especially bananas do not start bear fruit until many years have passed since planting.



Alternatively, moringa requires little to no irrigation to be a productive crop. Of course, irrigation is linked to extremely high rates of growth and the bearing of pods and leaves, but Moringa will sprout pods and leaves even with no precipitation or irrigation. If it receives no moisture at all for extremely lengthy periods of time it will shed its leaves and go dormant, feigning the appearance of death, but in fact it will remain alive to blossom upon the receipt of the next rainfall.

Madu: Is that it?

Al: No, Moringa oleifera also serves additional benefits to most that lie adjacent to it – with the notable exception of corn. Moringa is a nitrogen-fixing legume – which means that it fosters cultures of bacteria on and around its roots which take nitrogen and convert it into ammonia, enriching the nutritional content of the soil and thereby improving the yields of adjacent and/or subsequent garden crops.

Madu: Alright, fine. Now that’s it with the benefits of moringa – right?

Al: Your assumption is erroneous, for Moringa oleifera can also serve to assist in the treatment of water for drinking purposes and even in wastewater treatment, because the seeds of the plant contain a cation which is polarized and can therefore assist in flocculation.

Snoop: Fuck you too, man.

Al: You see, if particles of polluting matter are suspended in a solution, it is often because they are of the same usually negative charge and hence do not aggregate together – or rather, they do not “floc”. But certain polarized substances can catalyze these colloids to floc into the noun form – a floc – and accumulate sufficient weight to sink down to the bottom.



Moringa seeds contain so many of these aforementioned cations that if they are crushed into a fine powder with a mortar and pestle, they can serve as practical flocculants for use even in a non-monetary economy or those where commercial flocculants such as aluminum chloride or polyaluminum sulfate are otherwise unavailable on the market.



Madu:
So what you’re saying is, if there’s little bitty poo particles in someone’s well, if you add moringa seeds then they’re going to form big pieces of poo and settle on the bottom of the well? How is moving the poo from the top of the well to the bottom of the well going to make it more sanitary?

Al:
Even if the entire body of water is not potable, since the vast majority off well water is taken from the top of the well, or if someone fills a cup from the top of the water jug it is almost certainly from the top of the water jug, the process of flocculation per se will reduce the total quantity of fecal particles consumed by that individual.

Madu: So I should just quit it with the chlorine treatment and just start filling my water filter with moringa seed powder?

Al: If you possess the means, it would be advisable to do both, for flocculation in fact expedites chlorination and renders it more effective overall. Sodium hypochlorite – bleach – purifies water only by killing and removing pathogens such as bacteria and amoebas; however, it is limited by the overall mass of pollutants suspended in the body of water at hand. If each particle of sodium hypochlorite can kill and remove exactly one unicellular pathogen, and if the number of bleach particles is greater than or equal to them number of pathogens, then chlorination is an adequate method of water purification. However, if the number of pathogens exceeds that of bleach particles, then the population of pathogens can be lessened but not annihilated and can even grow resistant over time. Flocculation increases the efficacy of chlorination by floccing the pathogens together into a lesser number of larger, heavier particles.



Madu: So this moringa tree thing, all I have to do is plant the seed, maybe I should water it a little if I’d like but I don’t really have to, and the tree that grows out of it improves nutrition, it improves the yields of all of the other plants in its garden, and it can even make drinking water treatment more effective. Is there anything that this tree cannot do?

Al: To my knowledge, it remains unable to encourage Malians to wash their hands before eating and sharing their fecal matter through the common food bowl.




Friday, February 26, 2010

Solar Pump Repair and Maintenance Project



In 1998 the World Vision NGO financed the installation of a solar pump system in the town of Sanadougou. The aim of this project was very straightforward; in this growing market town of more than 4,000 people where the bulk of the population regularly suffers from giardia, dysentery and worms inadvertently contracted by drinking from unsanitary wells, public health could be drastically improved with access to potable drinking water. World Vision hired Bamako contractors to build a groundwater pump, and two water storage towers to be powered by an array of solar panels. The contractors built a pump-serviced livestock-watering trough in the adjacent vicinity of the complex as well as 7 tap posts strategically-located throughout the town; altogether, there are 17 taps – 3 of the posts have room for 3 individual taps while the 4 other posts have only 2 taps. As promising as this system might have been at the onset, the entire system is now essentially useless due to lack of maintenance and necessary repairs. In response to these pressing needs, the Sanadougou Water Committee has petitioned their Peace Corps Volunteer to help them institute a plan to repair and reorganize the entire system.

The solar panels, the pump and storage towers are perfectly fine, but the entire system as a whole is seriously malfunctioning due to breakages at the livestock watering trough and in a way-station in the metal pipe connecting the water pump to the taps in the Filablena neighborhood. These parts cannot be shut off and flow at the maximum rate at all times.



The ever-flowing watering trough and broken way-station overload the capacity of the entire system, directly exhausting the supply of potable drinking water and often leaving the taps dry. Even when there is water left for human consumption the water pressure is significantly diminished, which allows for rust to develop and diminish water quality. Furthermore, the perpetually-flowing components create vast puddles of standing water which serve as a fertile environment for mosquito breeding. Note that the picture above was taken during dry season on a day when most of the overflow had evaporated in the 105-degrees Fahrenheit heat – during cold and wet season, the puddle of overflow from the livestock-watering trough expands almost all the way to the leafless tree in the center-left of the photograph.

The Water Committee has analyzed these broken parts and they have given them to local plumbers to try to weld them back together, but the plumbers have returned to say that these parts are beyond repair; Peace Corps Assistant Water and Sanitation APCD Adama Bagayoko has analyzed these parts as well and independently concluded that the only course of action is to purchase entirely new components. I apologize that I am unable to find the English translations, but specifically, the parts we need are (in French): une ventousse, un compteur, une vanne, un raccord union, une coude MF, un reducteur, une vanne p26, le clapet vapere. We plan on buying these broken parts from the Bamako suppliers SETRA, and we will hire the local welder Smeila Fané to reassemble the malfunctioning parts and weld them onto the rest of the solar pump system. To our understanding, there is no evidence of malfeasance or negligence for the broken parts – this is merely repair which should be expected in such a large system after 12 years of running and is now long overdue.

However, even if we were to replace the broken components at the livestock-watering trough and the way-station, this solar pump system would still be operating well below capacity and with little benefit for public health; only 3 out of 17 taps are currently operational. The problem with the taps is that they are simply too easy to break; children are used to pumping water with the vertical pump handles with such strenuous work that they have to jump up and down to obtain water, and though the horizontal handles to the tap system can be opened with the flick of a wrist, this is a point which apparently has not been conveyed as children have broken all of the tap handles.



Though the direct cause of this problem was of course the children themselves, this result was inevitable when World Vision built this system with the flimsiest, most fragile handles available. And since these little pieces of metal are now gone, the entire solar pump system is now effectively useless, completely wasting the charitable donations of well-minded humanitarians to the tune of about a million dollars. Well, to be fair, it wasn't a total waste - now for a million dollars the cows of Sanadougou could drink better-quality water than their human masters.



Since the townsfolk of Sanadougou cannot access the potable drinking water provided by the solar water pump, they resort to unsanitary, uncovered wells for their supply of drinking water. These traditional wells – which are really little more than holes in the ground – are home to vibrant populations of worms, snails, amoebas, giardia cysts, and in some cases even frogs and fish. In some locations – particularly during rainy season – these unimproved wells are directly polluted with wastewater and contaminated with human fecal matter. The fact that the people must fall back on such substandard water sources is the prime reason why giardia and dysentery are endemic in this community, and why diarrhea is after malaria the most common preventable cause of infant and child mortality.

Of the 3 taps that are functional, they are functional only because certain individuals have put in their own money to buy their own private taps with locks; one being the tap shared by the Peace Corps Volunteer, the doctor and kindergarten teachers, and the other two are adjacent to mechanic shops where they are used to clean motorcycles with potable drinking water. What differentiates the sites of these taps and the other are the functioning ones are used exclusively by a small number of relatively wealthy people who are both willing to spend money on clean water and also confident that their resources will be used almost exclusively by themselves with few (if any) free-riders. Asides from the tap managed by the Volunteer, the two other functioning taps provide little public health benefits to the population as this potable drinking water is used almost exclusively for cleaning motorcycles. As regrettable as this situation might be, it aptly demonstrates the universality of a saying from the American West, that “water flows uphill towards money”; as the rest of the community pays nothing, they are unable to obtain potable drinking water even from the tap system installed next to their homes at great cost.

When World Vision built the solar pump > tap system a decade ago, the NGO agreed to finance the totality of the initial startup costs only because the Mayor agreed that the citizens of Sanadougou would pay for maintenance and operating costs on a pay-as-you-go basis. However, such payments never happened since the taps were free for all to use and break anonymously; and since no one at le Bureau de la Mairie or the Water Committee could possibly know who was and who was not drawing water from the taps, they could not change anyone; without any accrual of maintenance costs, the system of course degraded into oblivion.

With this history in mind, the Sanadougou Water Committee unanimously resolved to 1) replace the broken taps and 2) begin a payment program so that the Committee will be able to garner revenue to finance inevitable maintenance and repairs in the future. The Committee decided that they cannot do only one of these things, they must do both at the same time. And in this way they will capitalize on the opportunity granted them by the need for repairing the solar pump system to fundamentally overhaul its use under the guidance of the Water Committee.

First of all, we need to get new taps that cannot break so easily. After children broke the last tap next to my house I bought a new tap with a hole through the handle so that it can be locked by the user. By limiting the access to this tap to the holder of the three keys, only I, the doctor and the kindergarten teachers next to me could get access to potable water. However, the doctor and kindergarten teachers were really bad about locking the tap after using it. And even when it was locked, children would come to the tap and try to open it – though they could not access water, they could break the handle in trying. After six months, even this tap deteriorated to the point that it could no longer be used.



A month ago I bought another new tap which can only be opened with a key – though unlike the previous model, the key goes directly into the head itself and there is no external handle at all. In other words, there is really no external part on this tap that can be broken by children. What is more, there is only one key to each tap – which means that responsibility unambiguously falls on him or her to maintain it and that they cannot pass the buck to someone else. This model seems promising enough to serve as a model for refurbishing the remaining 14 taps which are currently useless because their handles have been broken off.



Having showed this new tap to the Water Committee, we agreed that we must pair the repairs of the broken livestock-watering trough and way-station with the replacement of all the broken taps with new lockable taps with keys to ensure that the human population can have a sustainable supply of potable drinking water. As my homologue Sidiki Sogoba jokes, “Otherwise, we would spend a lot of money to help only the cows.” And this is the crux for our plan to reorganize the solar pump > tap system. Part of Sanadougou’s community contribution will be to purchase 17 new lockable taps at 3,000 CFA a piece, and these are going to be paid for neighborhood by neighborhood. Likewise, since each tap comes with exactly one key, the Water Committee is going to decentralize the daily operation and maintenance of each tap neighborhood by neighborhood.

Under our plan, each individual tap will be the responsible of exactly one person to whom the Water Committee and village chief – in consultation with the neighborhood – will assign the sole key. For example, the tap post in the neighborhood of Jigila has room for two taps, so we will assign the key to one to the butigitigi whose shop is directly adjacent to the tap post and the other key to a woman next door. Since water collection is primarily the duty of women in Malian culture, we are going to emphasize the assignment of keys to women whenever possible. Very rarely do men ever draw water, so only in circumstances such as this where there is a man who can in fact be counted on to always be next to the tap will we assign keys to men. The Committee agreed that the key criteria in assigning keys should be individuals’ proximity of their home to the tap, reliability of being at that location at any given time, maturity, ability, responsibility, trustworthiness, and of course their interest in volunteering for such a duty. We also agreed that persons of great importance in this community e.g. the chief of the village, the Mayor, the imam and the pastor should expressly not be assigned keys, for their other duties would make them unreliable to be in the vicinity of the tap at all times.

The kletigi – “holder of a key” – would be a position of great responsibility and great power. They have to be willing to open the water tap for all people at all times, to make sure that children to not play with the taps, and to moreover keep a record of who draws water from that tap and how much. Ultimately, the crux of the position of kletigi will be to collect money from every person in the neighborhood who draws water from that tap. The Water Committee agrees unanimously that we have to establish some sort of a payment system to pay for the maintenance and operational costs of the entire solar pump > tap system so that the next time that a pipe leaks or a tap needs replacement, the Committee will have money on hand to pay for any necessary repairs. In so many words, the Sanadougou Water Committee understands that potable drinking water is a valuable commodity that cannot be procured for free, and thus they have taken it unto themselves to transform this useless, broken-down NGO “cadeau” into a functioning utility that bends to the laws of market economics and finance its maintenance and operating costs through user fees.

The Water Committee still needs to work out how exactly they are going to conduct the payment program. There is one camp in the Committee that argues that people should pay a small price i.e. 5 or 10 CFA for every bucket of water so that payment is perfectly conditional to use; another camp in the Committee argues that such a scheme would be impractical to implement and so water tap subscribers should pay a flat monthly rate. The eventual payment policy will probably allow for users to pay for water either by the bucket or by a flat monthly rate. One area of agreement is that on every market day the Committee should assign one kletigi to man the taps next to the market so that they can draw water and collect money from all of the market vendors and customers who would otherwise consume water as free-riders. Each individual kletigi would be responsible for keeping accounts of how much money they collected from each individual and to forward those user fees to the Treasurer of the Water Committee. Another issue that has yet to be decided is whether the kletigi’s should receive any compensation for their work, for the Committee acknowledges that their duties can be an inconvenience, and I voiced wariness that any individual kletigi might pocket user fees which are meant to pay for maintenance and repairs.

One could pose the question of moral hazard in this situation; e.g. “The NGO built this solar pump system on the premise that the village would provide maintenance indefinitely thereafter – why should a foreign development agency pay for the maintenance costs that the villagers agreed to pay themselves?” I can commiserate with this argument; however, it is overlooking a number of important facts: 1) the Mayor's Office which made this original agreement and the Water Committee that wants to revamp the solar pump system are completely separate entities; 2) the World Vision NGO originally built this entire system with easily-breakable taps completely inappropriate for public infrastructure in an African village; 3) the NGO completely dropped the ball in organizing a payment system; 4) the village has never had any experience repairing or maintaining a running water system before. Not to be paternalistic, but the NGO must have had unreasonably great expectations that the Mayor’s Office could be able to effectively manage this complex system without any background experience and without any guidance, training or even suggestions. From my own experience, I can say that World Vision made an enormous mistake by entrusting this responsibility to the Mayor's Office and not the independent Water Committee, because in a rural village it is the traditional, informal government that actually wields all substantial power over public infrastructure - and the Mayor is really just a figurehead who gets paid to be everybody's friend. And le Bureau de la Mairie in question frankly has no genuine interest in managing the public drinking water system. As the Committee explained to me, it was precisely in the Mayor's best interest to just yes the NGO about instituting a payment system and do nothing once they packed up and left, because whereas presiding over a giant new cadeau and not asking anything of anybody is a boon to re-election (even if it evenually falls apart without maintenance), asking the people to pay for public services with user fees or taxes is decidedly not in the best interest of any self-interested public office-holder. Yes, eventually the Water Committee and le Bureau de la Mairie have to be able to eventually manage this system entirely by themselves – but in the meantime, now that one of the two groups has put forward a proposal to get serious about organizing these waterworks and fix what is broken, I think that it is perfectly reasonable to match their own repairs with $483.72 to rebuild a functioning system requisite for sound management.

Altogether, this project will allow the Sanadougou Water Committee to take the long-neglected solar pump system and overhaul it into a functioning water utility, re-organizing it with respect to market forces to benefit the public good. It will respond to the Committee’s desire to repair and reorganize the waterworks by raising funds through the Peace Corps Partnership to pay for new parts for the broken livestock-watering trough and way-station. The Committee will pay for the transportation of the materials from Bamako to the village of Sanadougou, they will hire a local plumber to assemble the parts and a local blacksmith to weld the necessary pieces together. They Committee will also raise money from the villagers to purchase new, lockable heads for the 14 broken taps. And the Committee will follow up by instituting a payment system – probably monthly for certain subscribers, daily for all others, so that they can gain the necessary revenues to pay for maintenance and operating costs in the future. Even after the initial repairs are complete, we will spend the rest of my service working to strengthen the Committee’s accounting and budgeting skills. And if this works out, the Sanadougou Water Committee should be able to build the capacity to effectively manage the solar pump and tap system indefinitely without any need for further foreign intervention.

If you are interested in making a financial contribution to repair and maintain the people of Sanadougou's drinking water infrastructure, click here. This project should be on the Peace Corps Partnership website within a few weeks.


Tuesday, December 2, 2008

Living By Ethiopia's Sewage Canal

As much as Mali could use some work on its water sanitation, conditions in Ethiopia's capitol city are much, much worse.

Chickenshit on the Chesapeake

Here is an interesting story explaining the problems in maintaining the ideal supply of chicken poop. Though chicken poop is among the world's greatest known organic fertilizers, no one really likes to transport poop across long distances, so without a vibrant local agricultural sector to consume all of this chicken poop it becomes a rather noxious form of water pollution.