Water Quality

Water Quality Testing
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Water Quality Program

Swimming in the Hudson

This program aims to improve the water quality of the Hudson and its tributaries through increased water quality monitoring and public notification, consistent investment in wastewater and stormwater infrastructure, and better water quality policies.
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Hudson River Data

water quality testing map

View water quality data collected monthly (May-October) from 74 sampling sites on the Hudson River Estuary.
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Citizen Testing Data


View water quality data from 96 sites on seven tributaries of the Hudson River.
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New York Tap Water

Ashokan Resevoir

We all have the right to know what’s in our drinking water. The Safe Drinking Water Act, passed in 1976, authorized the United States Environmental Protection Agency (EPA) to set drinking water standards for all public water systems. Water utilities are required to monitor and […]
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Tools & Databases for Waterway Research

Learn about your waterway using the databases, maps and other resources assembled here. Learn More