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SDWIS/State is a data system that EPA is developing for states that will improve the quality of drinking water information.
Search relevance: 316.26 | Views last month: 10 | Catalog Last Checked: September 10, 2026 at 07:11 PM -
This dataset includes the number of service connections, categorized by type and metering status, as submitted by public water systems via the electronic annual report (eAR) in sections 3 or 4 for...
Search relevance: 109.61 | Views last month: 1 | Catalog Last Checked: October 24, 2026 at 08:44 PM -
This dataset is made up of seven separate reports from the U.S. Environmental Protection Agency's (USEPA) Safe Drinking Water Information System (SDWIS). Site visits were queried using SDWIS to...
Search relevance: 108.69 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
This data release contains groundwater-quality data for three parameters of interest (arsenic, manganese, and pH) and well information for sample sites for aquifers in the conterminous U.S....
Search relevance: 98.63 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 09:22 PM -
This dataset describes public-supply groundwater use by aquifer type within the glaciated conterminous United States between 2005 and 2014. All or part of 24 states within this glaciated region...
Search relevance: 89.40 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 10:18 PM -
This dataset represents a water shortage vulnerability analysis performed by DWR using Small Water System boundaries pulled from the SWRCB (State Water Resource Control Board) water system...
Search relevance: 83.94 | Views last month: 2 | Catalog Last Checked: October 24, 2026 at 08:45 PM -
Groundwater salinity impacts water quality and limits usability for drinking, irrigation, and industrial purposes where salinity is high. Salinity is a measure of the mass of dissolved salts in a...
Search relevance: 73.26 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 08:01 PM -
This data release contains groundwater-quality data and well information for the glacial aquifer system in the northern USA. Water-quality data and well information were derived from a dataset...
Search relevance: 67.32 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 08:55 PM
