Envirofacts Web Services

Envirofacts Web Services is a central hub for EPA developers and analysts to access Envirofacts APIs, program-specific API guidance, and related tools.

Core APIs

• Envirofacts Data Service API
  Core REST API documentation for querying Envirofacts data via URL, including output formats and request patterns.
• DMAP GraphQL API
  GraphQL endpoint documentation for DMAP use cases, including query structure, functions, filters, and examples.

Program-specific REST guidance

These pages provide program-focused guidance and examples for working with specific Envirofacts datasets using the Envirofacts web services ecosystem.

• UV Index RESTful Data Service
  Program-specific guidance for retrieving hourly and daily UV Index forecasts (including alert-level information) by location using Envirofacts REST endpoints.
• Greenhouse Gas RESTful Data Service
  Program-specific guidance for accessing Envirofacts greenhouse gas data through REST endpoints, with links to search tools and metadata resources.

Tools and usage statistics

• Envirofacts REST API Viewer
  Interactive tool to explore and test Envirofacts REST API calls.
• API statistics
  Usage counts by year, month, and program.

Related pages

• Data & Developer Services
  Parent hub for Envirofacts developer resources, documentation, metadata, and downloads.