All water data sources
FreeGovernmentUnited States
EPA Envirofacts Data API
Environmental data service API
epa.gov
At a glance
- Region
- United States
- Coverage
- Multiple EPA databases
- Access
- Free
- Category
- Government
- Last updated
- 2025
What's inside
- API Access
- JSON
- CSV
- Excel
- RESTful endpoints
What you can do with it
Typical work that data of this type supports.
- 01
Baselines
Set a baseline for a project, report or proposal.
- 02
Combine sources
Join it with other datasets for a fuller picture.
- 03
Teaching
Use it in classes and student projects.
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Ask in plain language
Query it through a chat assistant instead of writing code.
- 02
Automatic QC
Find errors and gaps automatically.
- 03
Find related data
Let AI suggest datasets that fill the gaps.
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- FEMA National Flood Hazard LayerUnited States | Free
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