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National List of Beaches
EPA has published a list of coastal recreation waters adjacent to beaches (or similar points of access) used by the public in the U.S. The list, required by the Beaches... -
Safe Drinking Water Information System (SDWIS)
The Safe Drinking Water Information System (SDWIS) contains information about public water systems and their violations of EPA's drinking water regulations. -
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... -
National Recommended Water Quality Criteria
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 Lakes Assessment Data
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... -
Drinking Water Treatability Database (TDB)
The Drinking Water Treatability Database (TDB) presents referenced information on the control of contaminants in drinking water. It allows drinking water utilities, first... -
Office of Water Linked Data
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... -
Human Health Benchmarks for Pesticides
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... -
National Contaminant Occurrence Database (NCOD)
NCOD is a repository of drinking water quality data to be made available to EPA decision makers and the public. -
Beach Advisory and Closing Online Notification (BEACON) system
Beach Advisory and Closing Online Notification system (BEACON) is a colletion of state and local data reported to EPA about beach closings and advisories. BEACON is the public-... -
Watershed Assessment, Tracking & Environmental ResultS (WATERS)
The Watershed Assessment, Tracking & Environmental Results (WATERS) is an integrated information system for the nation's surface waters connecting Office of Water databases... -
National Listing of Fish Advisories
The National Listing of Fish Advisories (NLFA) is an online database that includes available information describing state-, tribal-, and federally-issued fish consumption... -
Water Quality Portal
The Water Quality Portal (WQP) is the premiere source of discrete water-quality data in the United States and beyond. This cooperative service integrates publicly available... -
Safe Drinking Water Information System - State System (SDWIS/State)
SDWIS/State is a data system that EPA is developing for states that will improve the quality of drinking water information. -
Data on Aquatic Resources Tracking for Effective Regulation
DARTER is EPA's system to manage its workflow in the Clean Water Act Section 404 permit program. Section 404 requires a permit from the U.S. Army Corps of Engineers, or EPA-... -
Wetland Program Development Grants (WPDGs)
The Wetland Grant Database (WGD) houses grant data for Wetland Program Development Grants (created by EPA in 1990 under the Clean Water Act Section 104(b)(3) authority). The... -
Wadeable Streams Assessment Data
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... -
2013 EPA Vessels General Permit (VGP)
Information for any vessel that submitted a Notice of Intent (NOI), Notice of Termination (NOT), or annual report under EPA's 2013 Vessel General Permit (VGP). Search results... -
Water Quality attainment Information from Clean Water Act Statewide Statistical Surveys
Designated uses assessed by statewide statistical surveys and their state and national attainment categories. Statewide statistical surveys are water quality assessments...
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