The U.S. Geological Survey compiled more than 230 aquifer studies for a snapshot of groundwater quality in 62 principal aquifers the United States. The map above shows the percentage of wells in each ...

The United States Geological Survey (“USGS”) updated in May its health-based screening levels (“HBSLs”). USGS describes HBSLs as non-enforceable water-quality benchmarks. USGS states that these ...

(Beyond Pesticides, March 31, 2009) More than 20 percent of private domestic wells sampled nationwide contain at least one contaminant at levels of potential health concern, according to a study by ...

More than 20 percent of untreated water samples from 932 public wells across the nation contained at least one contaminant at levels of potential health concern, according to a new study by the U.S.

Today, the U.S. Geological Survey released a report describing the occurrence of pesticides in streams and ground water during 1992-2001. The report concludes that pesticides are typically present ...