Search datasets
-
The Safe Drinking Water Information System (SDWIS) contains information about public water systems and their violations of EPA's drinking water regulations.
Search relevance: 1.00 | Views last month: 216 | Catalog Last Checked: May 01, 2026 at 06:08 PM -
This GIS dataset contains data on wastewater treatment plants, based on EPA's Facility Registry Service (FRS) and NPDES, along with Clean Watersheds Needs Survey (CWNS) and other data sources.
Search relevance: 1.00 | Views last month: 65 | Catalog Last Checked: May 06, 2026 at 12:30 AM -
This dataset shows the temporal frequency and spatial extent of cyanobacteria cells in large, freshwater lakes and reservoirs across the continental United States derived from 300x300 meter MEdium...
Search relevance: 1.00 | Views last month: 56 | Catalog Last Checked: May 06, 2026 at 12:02 AM -
ECHO provides integrated compliance and enforcement information for about 800,000 regulated facilities nationwide. Its features range from simple to advanced, catering to users who want to conduct...
Search relevance: 1.00 | Views last month: 49 | Catalog Last Checked: June 17, 2026 at 12:48 AM -
National Primary Drinking Water Regulations (NPDWRs or primary standards) are legally enforceable standards that apply to public water systems. Primary standards protect public health by limiting...
Search relevance: 1.00 | Views last month: 29 | Catalog Last Checked: May 01, 2026 at 06:08 PM -
The is a curated dataset of information for all public water systems (PWS) in California, including the name, location and some general informaiton for each PWS. The source of the data...
Search relevance: 1.00 | Views last month: 25 | Catalog Last Checked: July 28, 2025 at 09:52 PM -
This EnviroAtlas web service supports research and online mapping activities related to EnviroAtlas (https://www.epa.gov/enviroatlas). This web service includes layers depicting EnviroAtlas...
Search relevance: 1.00 | Views last month: 20 | Catalog Last Checked: May 06, 2026 at 12:11 AM -
This EnviroAtlas web service supports research and online mapping activities related to EnviroAtlas (https://www.epa.gov/enviroatlas). This EnviroAtlas dataset describes the percentage of a 15-m...
Search relevance: 1.00 | Views last month: 20 | Catalog Last Checked: May 06, 2026 at 12:20 AM -
This downloadable data package consists of location and facility identification information from EPA's Facility Registry Service (FRS) for all sites that are available in the FRS individual...
Search relevance: 1.00 | Views last month: 18 | Catalog Last Checked: June 16, 2026 at 12:23 AM -
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 drinking water...
Search relevance: 1.00 | Views last month: 16 | Catalog Last Checked: May 01, 2026 at 06:08 PM -
The objective of this research was to predict nutrient, chlorophyll-a, and associated harmful algal bloom, hypoxia, and eutrophication effects in US lakes. This research used nutrient and...
Search relevance: 1.00 | Views last month: 16 | Catalog Last Checked: April 21, 2026 at 08:05 PM -
This GIS dataset contains data on wastewater treatment plants, based on EPA's Facility Registry Service (FRS) and NPDES, along with Clean Watersheds Needs Survey (CWNS) and other data sources.
Search relevance: 1.00 | Views last month: 14 | Catalog Last Checked: June 16, 2026 at 12:23 AM -
Information on sole source aquifers (SSAs) is widely used in assessments under the National Environmental Policy Act and at the state and local level. A national layer, including all available SSA...
Search relevance: 1.00 | Views last month: 14 | Catalog Last Checked: May 06, 2026 at 12:50 AM -
This EnviroAtlas web service supports research and online mapping activities related to EnviroAtlas (https://www.epa.gov/enviroatlas). This web service includes layers depicting EnviroAtlas...
Search relevance: 1.00 | Views last month: 13 | Catalog Last Checked: May 05, 2026 at 11:57 PM -
This web feature service consists of location and facility identification information from EPA's Facility Registry Service (FRS) for the subset of sites that link to the Assessment Cleanup and...
Search relevance: 1.00 | Views last month: 13 | Catalog Last Checked: June 16, 2026 at 12:23 AM -
The California Groundwater Ambient Monitoring and Assessment Program (GAMA) is a statewide assessment of groundwater quality designed to help better understand and identify risks to groundwater...
Search relevance: 1.00 | Views last month: 11 | Catalog Last Checked: May 05, 2026 at 10:04 PM -
This EnviroAtlas dataset describes the percentage of forested, vegetated, and impervious land within 15- and 50-meters of hydrologically connected streams, rivers, and other water bodies within...
Search relevance: 1.00 | Views last month: 10 | Catalog Last Checked: May 06, 2026 at 12:03 AM -
The California Groundwater Ambient Monitoring and Assessment Program (GAMA) is a statewide assessment of groundwater quality designed to help better understand and identify risks to groundwater...
Search relevance: 1.00 | Views last month: 9 | Catalog Last Checked: May 05, 2026 at 09:50 PM -
This dataset contains the results of EPAs estimates for domestic water supply in The United States for 2020 census blocks. The file is a comma-delimited text file, which contains records for 2020...
Search relevance: 1.00 | Views last month: 9 | Catalog Last Checked: April 21, 2026 at 08:06 PM -
The fasta file (BM_OTU.fasta) contain the sequences of the bacterial 16S rRNA-encoding V4 region gene (≈250 nt) for each Operational Taxonomic Unit (OTU). This dataset is associated with the...
Search relevance: 1.00 | Views last month: 9 | Catalog Last Checked: April 21, 2026 at 08:00 PM
