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Drinking Water Maximum Contaminant Levels (MCLs)
National Primary Drinking Water Regulations (NPDWRs or primary standards) are legally enforceable standards that apply to public water systems. Primary standards protect public... -
SDWISFED Drinking Water Data
SDWIS/FED is EPA's national regulatory compliance database for the drinking water program. It includes information on the nation's 160,000 public water systems and violations of... -
Surface Water Drinking Water Source Areas
This data layer is an element of the Oregon GIS Framework. This map includes Oregon Department of Environmental Quality (DEQ) and Oregon Department of Human Services’ (DHS)... -
Satellite monitoring of cyanobacterial harmful algal bloom frequency in...
This dataset shows the concentration of cyanobacteria cells/ml in fresh water bodies and estuaries of the Ohio and Florida derived from 300x300 meter MEdium Resolution Imaging... -
Contaminant Candidate List 1
CCL 1 is a list of contaminants that are currently not subject to any proposed or promulgated national primary drinking water regulations, that are known or anticipated to occur... -
Safe Drinking Water Information System (SDWIS) Federal Reports Advanced Search Tool
A database where EPA has compiled data on public drinking water systems and whether they have certain drinking water violations. This data is collected by the states and given... -
Six-Year Review Contaminant Occurrence Data
The Safe Drinking Water Act (SDWA) requires EPA to review each National Primary Drinking Water Regulation (NPDWR) at least once every six years and revise them, if appropriate....