Maps & Data
National
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Updated Apr 2026
EPA WATERS GeoViewer — Watershed Assessment and Mapping
Program Summary
Interactive mapping tool for water quality data, impaired waters, and watershed boundaries.
Full Description
EPA's WATERS (Watershed Assessment, Tracking, and Environmental Results System) GeoViewer provides an interactive mapping tool for exploring water quality data, impaired waters listings, and watershed boundaries. The tool integrates data from multiple EPA databases and allows users to view water quality assessments, permitted discharges, and monitoring station locations.
Key Details
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Eligible Applicants
General public and water professionals
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Geographic Focus
National
payments
Funding Amount
Free to use
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Contact
EPA Office of Water
