In this photo taken on Feb. 26, 2009, aeration basins are seen in operation at the Wilmington Wastewater Treatment Plant in Wilmington, Del. Scientists took samples from the Delaware River nearby and found elevated concentrations of the painkiller codeine that are prompting them to try and track the source of the drug; this treatment plant handles sewage from a nearby pharmaceutical factory that makes codeine.
(AP Photo/Matt Rourke)
As part of its ongoing PharmaWater investigation about trace concentrations of pharmaceuticals in drinking water, AP identified 22 compounds that show up on two lists: the EPA monitors them as industrial chemicals that are released into rivers, lakes and other bodies of water under federal pollution laws, while the Food and Drug Administration classifies them as active pharmaceutical ingredients.
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