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State
2019 California Water Quality Status Report
State of California —
The California Water Quality Status Report is an annual data-driven snapshot of the Water Board’s water quality and ecosystem data. This third edition of the report... -
Federal
Great Lakes Environmental Database (GLENDA)
U.S. Environmental Protection Agency —
The Great Lakes Environmental Database (GLENDA) houses environmental data collected by EPA Great Lakes National Program Office (GLNPO) programs that sample water,... -
Federal
National Hydrography Dataset Plus High Resolution (NHDPlus HR) - USGS National Map Downloadable Data Collection
Department of the Interior —
The High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated datset of geospatial data layers, including the most current National Hydrography... -
Federal
USGS Water-Quality Data for the Nation - National Water Information System (NWIS)
Department of the Interior —
The USGS compiles online access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, Puerto Rico, the... -
Federal
Enforcement and Compliance Information Center - ECIC
U.S. Environmental Protection Agency —
Enforcement and Compliance Information Center - ECIC is a repository of external policy and guidance documents, links to cases and settlements, civil and criminal... -
State
California Water Rights LIST (Detail Summary List)
State of California —
This list includes detail information about every water rights record in the State Water Resources Control Board's "Electronic Water Rights Information Management... -
Federal
Concentrations of Per- and Polyfluoroalkyl Substances (PFAS) and Other Chemical Constituents for Groundwater and Surface Water Samples on Western Cape Cod, Massachusetts, 2014-2019 (ver. 1.1, November 2025)
Department of the Interior —
Groundwater, surface water, and associated quality assurance samples were collected downgradient of an abandoned fire training area and wastewater infiltration beds... -
Federal
National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection NGDA
Department of the Interior —
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's... -
Federal
USGS Water Data for the Nation
Department of Energy —
The U.S. Geological Survey maintains national data bases of water-use information. The data are collected and compiled every five years for each State, the District... -
Federal
SWAT - Soil and Water Assessment Tool
Department of Agriculture —
The Soil and Water Assessment Tool (SWAT) is a public domain model jointly developed by USDA Agricultural Research Service (USDA-ARS) and Texas A&M AgriLife... -
Federal
Safe Drinking Water Information System (SDWIS) Federal Reports Advanced Search Tool
U.S. Environmental Protection Agency —
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... -
Federal
USGS Digital Orthophoto Quadrangles
National Aeronautics and Space Administration —
A Digital Orthophoto Quadrangle (DOQ) is a computer-generated image of an aerial photograph in which the image displacement caused by terrain relief and camera tilt... -
Federal
Global Land Cover Characterization Program
National Aeronautics and Space Administration —
The Global Land Cover Characterization Project was established to meet science data requirements identified by the International Geosphere and Biosphere Programme... -
Federal
The StreamCat Dataset: Accumulated Attributes for NHDPlusV2 (Version 2.1) Catchments for the Conterminous United States: National Nutrient Inventory
U.S. Environmental Protection Agency —
These data represent the National Nutrient Inventory's quantification of major inputs (farm fertilizer, urban fertilizer, livestock manure, human waste, deposition,... -
Federal
Permit Compliance System (PCS)
U.S. Environmental Protection Agency —
The Permit Compliance System (PCS) provides information on companies which have been issued permits to discharge waste water into rivers. -
Federal
Global Reservoir and Dam Database, Version 1 (GRanDv1): Dams, Revision 01
National Aeronautics and Space Administration —
The Global Reservoir and Dam Database, Version 1, Revision 01 (v1.01) contains 6,862 records of reservoirs and their associated dams with a cumulative storage... -
Federal
Gridded Population of the World, Version 4 (GPWv4): Land and Water Area, Revision 11
National Aeronautics and Space Administration —
The Gridded Population of the World, Version 4 (GPWv4): Land and Water Area, Revision 11 consists of two rasters that measure surface areas of land and water in... -
Federal
The StreamCat Dataset: Accumulated Attributes for NHDPlusV2 (Version 2.1) Catchments for the Conterminous United States: Base Flow Index
U.S. Environmental Protection Agency —
This dataset represents the base flow index values within individual, local NHDPlusV2 catchments and upstream, contributing watersheds. Attributes of the landscape... -
Federal
April 2025 Probable Maximum 24-Month Study
Department of the Interior —
The Probable Maximum 24-Month Study report describes projected operations and power generation for Colorado River system reservoirs including Fontenelle, Flaming... -
Federal
Water level monitoring data at Lake Carl Blackwell, Payne County, Oklahoma
Department of Agriculture —
A radar water level sensor (Campbell Scientific ® CS475A-L) was installed on the water intake tower of Lake Carl Blackwell, Payne County, Oklahoma (36.1351 N, 97.2195...