"Groundwater sources" refers to the water that is stored beneath the surface of the Earth, often found in underground aquifers or wells. It is an important natural resource that can be accessed for drinking water and other purposes. Full definition
She was among the first to give national visibility to such issues as electromagnetic pulse weaponry and hormone - mimicking pollutants, and was the first anywhere to report on the widespread tainting of streams and groundwater sources with pharmaceuticals. (sciencenews.org)
The U.S. Environmental Protection Agency (EPA), under the terms of the Safe Drinking Water Act of 1974, is currently crafting new measures to regulate wells for CO2 injection — final rules are set to be adopted by 2011 to protect groundwater sources from CO2 in the subsurface, according to Stephen Heare, director of the EPA's drinking water protection division. (scientificamerican.com)
Oceans, rivers and fresh groundwater sources are typically monitored for radioactivity following a nuclear accident, but several years following the disaster, those weren't the most contaminated water sources. (sciencenews.org)