The U.S. Environmental Protection Agency develops criteria to protect people from organisms, such as viruses and bacteria, and their associated toxins in water bodies (e.g., lakes, rivers, beaches).

Geospatial data for EPA's Office of Water Programs are available as prepackaged national downloads or as more current GIS web and and data services. EPA provides WATERS geospatial data in a variety of ...

Anthropogenic and geogenic factors affecting groundwater arsenic and potential drinking water exposure in the San Luis Valley, Colorado Anthropogenic and geogenic factors affecting groundwater arsenic ...

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