United States Army Corps of Engineers

CWMS Data API

The Corps Water Management System (CWMS) Data API provides a RESTful interface for retrieving water management data from the U.S. Army Corps of Engineers. Supports access to time series, locations, ratings, forecasts, levels, projects, basins, and parameters for USACE-managed water resources nationwide.

GitHub OpenAPI

Documentation

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Documentation
https://cwms-data.usace.army.mil/cwms-data/

Specifications

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OpenAPI
https://raw.githubusercontent.com/api-evangelist/united-states-army-corps-of-engineers/refs/heads/main/openapi/cwms-data-api-openapi.yml

SDKs

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GitHubRepository
https://github.com/USACE/cwms-data-api

Other Resources

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SwaggerUI
https://cwms-data.usace.army.mil/cwms-data/swagger-ui.html

OpenAPI Specification

cwms-data-api-openapi.yml Raw ↑