USGS Data
Select a state from the map or list below to view water quality data and bacteria level forecasts for monitoring sites within that state.
Data is sourced from the United States Geological Survey (USGS) National Water Information System (NWIS) and updated regularly. Only states with with availible data can be viewed. You can view the USGS data by clicking the icon next to each state in the list below.
State Data Availability
States with available water quality monitoring data are highlighted and selectable.
All States
Alternative navigation for screen readers and keyboard users. Click a state to view detailed water quality data.
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