Datasets
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State-Specific Water Quality Standards Effective under the Clean Water Act (CWA) recent views
EPA has compiled state, territorial, and authorized tribal water quality standards that EPA has approved or are otherwise in effect for Clean Water Act purposes. This... -
Office of Water Linked Data recent views
The Office of Water Linked Data (OWLD) dataset stores EPA Water program information indexed to several National Hydrography Dataset frameworks. Indexing may be accomplished by... -
Safe Drinking Water Information System (SDWIS) recent views
The Safe Drinking Water Information System (SDWIS) contains information about public water systems and their violations of EPA's drinking water regulations. -
Clean Watersheds Needs Survey (CWNS) Reports to Congress recent views
America's capital investment needs are reported periodically to Congress. The information collected by the Clean Watersheds Needs Survey (CWNS) is used strictly to generate a... -
National Recommended Water Quality Criteria recent views
The National Recommended Water Quality Criteria is a compilation of national recommended water quality criteria for the protection of aquatic life and human health in surface... -
National Listing of Fish Advisories recent views
The National Listing of Fish Advisories (NLFA) is an online database that includes available information describing state-, tribal-, and federally-issued fish consumption... -
Safe Drinking Water Information System - State System (SDWIS/State) recent views
SDWIS/State is a data system that EPA is developing for states that will improve the quality of drinking water information. -
Grants Reporting and Tracking System (GRTS) recent views
The Grants Reporting and Tracking System (GRTS) is the primary tool for management and oversight of EPA's Nonpoint Source (NPS) Pollution Control Program. GRTS pulls grant... -
National Contaminant Occurrence Database (NCOD) recent views
NCOD is a repository of drinking water quality data to be made available to EPA decision makers and the public. -
Wadeable Streams Assessment Data recent views
The Wadeable Streams Assessment (WSA) is a first-ever statistically-valid survey of the biological condition of small streams throughout the U.S. EPA worked with the states to... -
National Lakes Assessment Data recent views
The National Lakes Assessment (NLA) is a statistical survey of the condition of our nation's lakes, ponds, and reservoirs. It is designed to provide information on the extent of... -
Estimated Total Nitrogen and Total Phosphorus Loads and Yields Generated within States recent views
Estimated state-wide total nitrogen (TN) and total phosphorus (TP) loads and yields, as predicted by the 2012 regional USGS SPARROW models.Excess nitrogen and phosphorus loading... -
Estimated Animal Agriculture Nitrogen and Phosphorus from Manure recent views
Animal agriculture manure is a primary source of nitrogen and phosphorus to surface and groundwater. Manure runoff from cropland and pastures or discharging animal feeding... -
Commercial Phosphorus Fertilizer Purchased recent views
Amounts of fertilizer P2O5 purchased by states in individual years 2003, 2005, 2007, 2009 and 2011, and the % change in average amounts purchased per year from 2002-2006 to... -
Commercial Nitrogen Fertilizer Purchased recent views
Amounts of fertilizer nitrogen (N) purchased by states in individual years 2003, 2005, 2007, 2009 and 2011, and the % change in average amounts purchased per year from 2002-2006... -
National Coastal Condition Assessment (NCCA) recent views
During the summer of 2010, state and EPA crews conducted field sampling for the fifth National Coastal Condition Assessment (NCCA). The assessment is in the data analysis and... -
Human Health Benchmarks for Pesticides recent views
Advanced testing methods now allow pesticides to be detected in water at very low levels. These small amounts of pesticides detected in drinking water or source water for... -
Contaminant Candidate List 1 recent views
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... -
Contaminant Candidate List 2 recent views
CCL 2 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... -
Contaminant Candidate List 3 recent views
CCL 3 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...