Groundwater Quality Data from the Delaware, Genesee, and St. Lawrence River Basins, New York, 2020

This data release contains analytical results from 52 groundwater samples and six quality assurance and quality control samples collected from the Delaware, Genesee, and St. Lawrence River basins. Samples were collected between June and September, 2020 from six production wells and five domestic wells in the Delaware River basin, seven production wells and 10 domestic wells in the Genesee River basin, and 13 productions wells and 11 domestic wells in the St. Lawrence River basin. Of the total wells sampled, 33 were completed in bedrock and 19 were completed in sand and gravel. Samples were collected prior to any treatment or filtration systems, from existing domestic and production wells equipped with permanently installed pumps.

Samples were collected and processed using standard USGS methods (see References.csv) and were analyzed for constituents including physicochemical properties, dissolved gases, major ions, nutrients, trace elements, pesticides, volatile organic compounds (VOCs), radiological activity, and indicator bacteria. All analytes are listed with the associated method detection and reporting limits. Samples were analyzed at the USGS National Water Quality Laboratory (NWQL) in Denver, Colorado, and other certified laboratories following published methods (see References.csv).