Drinking water delivered by community water systems (CWSs) comes from one or both of two sources: surface water and groundwater. Source water is raw, untreated water used by CWSs and is usually treated before distribution to consumers. Beginning in 200
Valder, Joshua F. jvalder@usgs.gov,Delzer, Gregory C. gcdelzer@usgs.gov,Kingsbury, James A. jakingsb@usgs.gov,et al. Anthropogenic organic compounds in source water of select community water systems in the United States, 2002-10. 2014-01-01.