By Gustavo Sanabria Brown
South Project Water Workshop, Faculty of Exact Sciences, UBA
a study of water taken by neighborhood residents
San Lucas and Mariano Moreno
Claypole . According to the results
100% of water samples from wells
nitrate levels exceed the limits set by the Argentine Food Code
In 2008, El Taller de Aguas de la UBA Home study the water they drink the inhabitants of Barrio San Lucas and Mariano Moreno de Almirante Brown.
With the consent of the residents of these neighborhoods but the aid groups the social and cultural Warehouse and Assembly launched Claypale important work. The purpose of the workshop
water is that the end of the study, which lasted about 1 year, neighbors and social organizations have a tool endorsed by the University of Buenos Aires to demand a network of sewers and water, as in that area, like most of Buenos Aires province, has no such rights are essential for a healthy and dignified life.
Water Workshop (consists of dozens of students, graduates and teachers of careers in Biology, Physics and Natural UBA.)
study in 2008 conducted two surveys: one in autumn (June) and another in spring (November). In total 33% of surveyed households.
wells were selected from different depth and location, so your analysis is representative of the entire neighborhood.
The objective is to determine the extent of the exposed population, namely the source and type of contamination, assess the presence of conditions commonly linked to contact with contaminated water. The result
In 40% of the houses, someone has infections (most, dermatological and / or respiratory) and 30% of the interviews the residents reported frequent diarrhea and / or cough in your household . 41% of the total has no social coverage.
Of the 132 lots which obtained information about the depth of drilling water, 89% reported lower values \u200b\u200bat 60 m depth. Within that group, 52% are between 20 and 40 m, and 30% are less than 20 m. Furthermore, the potholes are shallow (with an average of 8 m deep) and drain low frequency (32% never has, and those who do make it draining on average every 2.8 years) . Finally, it should be noted that 48% of surveyed homes flooded. Thus, the pit latrines can cause infiltration of sewage contamination in the aquifer vertical and lateral Pampeano in water of these wells are not jacketed.
of a total of 18 wells tested, only two (11% of cases) the microbiological parameters were adjusted to values \u200b\u200blegislated by the Argentine Food Code (CAA) throughout the year. Much showed fecal coliform bacteria contamination, which shows that one of the main factors of water pollution in the neighborhood are the sewage from the septic tanks.
Between 18% and 50% of private wells revealed the presence of the pathogen Pseudomonas aeruginosa, depending on the sampling date.
in 100% of water samples from wells nitrate levels exceeded the limits established by the CAA in at least one of the two samples. It was also observed with high incidence, higher turbidity values \u200b\u200bthan allowed. Although a minority often, contaminated wells were detected by ammonium and high hardness. For this last parameter should be noted that virtually no seasonal variation was observed, repeating the problem in the same samples
In June 2008 56% coliform bacteria positive fecal coliform bacteria
50% positive 50%
positive Pseudomonas aeruginosa
In November 2008 65% coliform bacteria
positive fecal coliform bacteria
31% positive 18% positive Pseudomonas aeruginosa
What are nitrates and nitrites?
are indirect indicators of biological activity. Its concentration is related to contamination by bacteria and other microorganisms. Nitrites are toxic and harmful to health, but the nitrogen is generally found in water as nitrate or as a harmonium. However, when nitrates are ingested by humans, microorganisms in, convert it into nitrite which are capable of oxidizing hemoglobin that carries oxygen throughout the body.
This result shows that one of the main factors of water pollution in the neighborhood are the sewage from the septic tanks. Neighbors from
November 2009 have sent the test results and letters to City Council in July calling for an emergency plan and construction of water supply and sewerage at the time received no response. Also
was sent to Aysa (Water and Sanitation Argentinos SA) and this letter stated the following:
"It states that they are outside the area served by this dealership radio.
Regarding the request for water network
Both neighborhoods are included within the improvement plan, operation, expansion and maintenance (PMOEM) which is dated to the period 2011-2013. "
neighbors commented on this medium of claims
Quarter Amelia Mariano Moreno said "I live here 42 years ago and in recent years, the webs are increasingly high, we can not keep spending $ 200 on a truck air every 15 days to live healthy" ... "More and more neighbors who have respiratory diseases"
Moreover Miguel grouping Claypole Assembly
told us "The municipality took 5 samples in August this year, and led to food science, but the results are already did not bother to inform us, we went to order, bromatologianos people said we can give that information ".." The only thing we can do is fight to speed up the time either the municipality or Aysa and further disseminate this claim, organize and ask neighbors to compromise "
The test results can be viewed in www.tallerdeaguas.com.ar
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