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Arsenic in Groundwater
March 25, 2013 | USGS

USGS authors have authored a book chapter titled: “Arsenic in groundwater: a summary of sources and the biogeochemical and hydrogeologic factors affecting arsenic occurrence and mobility”.

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Mercury in Groundwater
March 29, 2013 | United States Geological Survey
USGS authors have authored a book chapter titled: “Occurrence and mobility of mercury in groundwater”.

Arsenic in Pennsylvania Groundwater
April 25, 2013 | USGS
"Eight percent of more than 5,000 wells tested across Pennsylvania contain groundwater with levels of arsenic at or above federal standards set for public drinking water, while an additional 12 percent – though not exceeding standards – show elevated levels of arsenic." Quoted from the USGS Newsroom.

Vulnerability of Public-Supply Wells to Contamination
September 4, 2013 | USGS
"Key factors have been identified that help determine the vulnerability of public-supply wells to contamination. A new USGS report describes these factors, providing insight into which contaminants in an aquifer might reach a well and when, how and at what concentration they might arrive." Quoted from the USGS Newsroom.

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