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The Geographic Names Information System (GNIS) is the Federal standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS for the U.S. Board on Geographic Names, a Federal...
Search relevance: 1.00 | Views last month: 93 | Catalog Last Checked: September 10, 2026 at 09:50 PM -
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: 89 | Catalog Last Checked: August 03, 2026 at 04:16 AM -
When a species is proposed for listing as endangered or threatened under the Endangered Species Act, the U.S. Fish and Wildlife Service must consider whether there are areas of habitat believed to...
Search relevance: 1.00 | Views last month: 58 | Catalog Last Checked: September 10, 2026 at 06:04 PM -
The Walkability Index dataset characterizes every Census 2019 block group in the U.S. based on its relative walkability. Walkability depends upon characteristics of the built environment that...
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This web feature service contains location and facility identification information from EPA's Facility Registry System (FRS) for the subset of facilities that link to the Toxic Release Inventory...
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These unprojected (geographic coordinates) 3-Zone Average Annual Salinity Digital Geographies are based on analysis of long-term salinity data for 147 estuaries of the contiguous United States....
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This dataset, termed "GAGES II", an acronym for Geospatial Attributes of Gages for Evaluating Streamflow, version II, provides geospatial data and classifications for 9,322 stream gages...
Search relevance: 1.00 | Views last month: 37 | Catalog Last Checked: October 14, 2026 at 05:12 AM -
This web feature service contains location and facility identification information from EPA's Facility Registry System (FRS) for the subset of facilities that link to the Risk Management Plan...
Search relevance: 1.00 | Views last month: 35 | Catalog Last Checked: November 03, 2026 at 04:12 PM -
This web feature service contains location and facility identification information from EPA's Facility Registry System (FRS) for the subset of facilities that link to the Risk Management Plan...
Search relevance: 1.00 | Views last month: 34 | Catalog Last Checked: November 03, 2026 at 04:12 PM -
This web service depicts nearly 17,000 neighborhood boundaries in over 650 U.S. cities. Zillow created the neighborhood boundaries and is sharing them with the public under a Creative Commons...
Search relevance: 1.00 | Views last month: 32 | Catalog Last Checked: August 03, 2026 at 04:45 AM -
This web feature service contains location and facility identification information from EPA's Facility Registry System (FRS) for the subset of facilities that link to the Toxic Substances Control...
Search relevance: 1.00 | Views last month: 28 | Catalog Last Checked: November 03, 2026 at 04:12 PM -
This GIS dataset contains points which depict air quality monitors within EPA's Air Quality System (AQS) monitoring network. This dataset is updated weekly to reflect the most recent changes in...
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These limits and boundaries are measured from the official U.S. baseline, which is recognized as the low-water line along the coast as marked on NOAA nautical charts, in accordance with the...
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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 Virgin Islands, Guam, American...
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National watershed boundary (HUC12) dataset for the conterminous United States, retrieved 10/26/2020
This child item provides a snapshot of the watershed boundary dataset which consists of a shapefile with 87,020 12-digit hydrologic unit codes (HUC12) for the conterminous United States retrieved...
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This sediment database contains location, description, and texture of samples taken by numerous marine sampling programs. Most of the samples are from the Atlantic Continental Margin of the...
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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 dataset contains location and facility identification information from EPA's Facility Registry System (FRS) for the subset of facilities that link to Facility Response Plan (FRP) in the Oil...
Search relevance: 1.00 | Views last month: 19 | Catalog Last Checked: November 03, 2026 at 04:12 PM -
The NOAA National Estuarine Research Reserve (NERR) System-wide Monitoring Program (SWMP) collects meteorological, water quality, and nutrient/pigment data on an ongoing basis. Meteorological...
Search relevance: 1.00 | Views last month: 18 | Catalog Last Checked: October 27, 2026 at 12:14 AM -
Several bureaus within the Department of Interior compiled available information from seabird observation datasets from the Atlantic Outer Continental Shelf into a single database, with the goal...
Search relevance: 1.00 | Views last month: 18 | Catalog Last Checked: November 03, 2026 at 04:20 PM
