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Water Quality Data
Today's Water Conditions
Get continuous real-time water-quality measurements from Water-Quality Watch maps.
Water Quality Portal (WQP)
Get current and historical USGS and EPA water-quality data at the WQP.
BioData
Get stream ecosystem aquatic bioassessment data from BioData.
For More Data
View a complete list of USGS water-quality data resources.
USGS in Your Area
USGS Water Science Centers are located in each state.
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