Some articles about water contaminant sources overall and directly in Philadelphia
http://www.preservearticles.com/2012031026157/what-are-the-main-sources-of-water-pollution.html
http://water.epa.gov/polwaste/nps/outreach/point1.cfm
http://www.phillywatersheds.org/watershed_issues/water_quality_quantity
http://www.design.upenn.edu/files/panorama08-11_Wiener.pdf
This is good... did you learn that any of the contamination sources can be controlled within the neighborhood... do you have any idea which contaminants can be treated with bio-remediation (plants basically)? just curious, something to float around to your KSS team perhaps.
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