All water data sources
FreeGovernmentUnited States
Water Quality Data Download EPA
EPA water quality data download portal
epa.gov
At a glance
- Region
- United States
- Coverage
- EPA water quality datasets
- Access
- Free
- Category
- Government
- Last updated
- 2025
What's inside
- Download Portal
- Historical Data
- Water Quality Parameters
- Monitoring Results
- Data Export
What you can do with it
Typical work that data of this type supports.
- 01
Hotspots and trends
Find where contamination is high and whether it is getting worse.
Because it has: Water Quality Parameters
- 02
Compliance checks
Compare samples against drinking water and discharge standards.
- 03
Sampling plans
Decide where to sample and treat first.
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Risk maps
Predict contamination where no samples exist, from geology, land use and climate.
- 02
Anomaly alerts
Catch sudden spikes in sensor or lab data automatically.
- 03
From satellite
Estimate turbidity and chlorophyll in lakes and rivers from imagery.
Related water data
- USGS Water DataUnited States | Free
- Nine Springs WWTP DatasetUnited States | Free
- USGS Long-term Water Quality TrendsUnited States | Free
- FEMA National Flood Hazard LayerUnited States | Free
- National Groundwater Monitoring NetworkUnited States | Free
- NHDPlus High ResolutionUnited States | Free
Find more water data
Search and compare 1,900+ water data sources by region, type and access.