# EPA Air Quality System API

**Canonical:** https://apis.io/apis/environmental-protection-agency/aqs/  
**Provider:** Environmental Protection Agency — https://apis.io/providers/environmental-protection-agency/  
**Base URL:** https://aqs.epa.gov/data/api  
**Documentation:** https://aqs.epa.gov/aqsweb/documents/data_api.html

EPA Air Quality System API is one of 6 APIs that [Environmental Protection Agency](https://apis.io/providers/environmental-protection-agency/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Environment and Air Quality. The published artifact set on APIs.io includes API documentation.

The EPA Air Quality System (AQS) API provides programmatic access to ambient air pollution data collected by the EPA, state, local, and tribal air pollution control agencies, including hourly sample data, daily/quarterly/annual summaries, monitor information, and quality assurance data. JSON response format with API key authentication.

## Machine-readable artifacts (2)

- **Documentation** — https://aqs.epa.gov/aqsweb/documents/data_api.html
- **Signup** — https://aqs.epa.gov/data/api/signup

## Other Environmental Protection Agency APIs (5)

- [EPA Envirofacts Data Service API](https://apis.io/apis/environmental-protection-agency/envirofacts/)
- [EPA UV Index API](https://apis.io/apis/environmental-protection-agency/uv-index/)
- [EPA ECHO Compliance and Enforcement API](https://apis.io/apis/environmental-protection-agency/echo/)
- [Environmental Protection Agency Envirofacts API](https://apis.io/apis/environmental-protection-agency/environmental-protection-agency-envirofacts-api/)
- [Environmental Protection Agency UVIndex API](https://apis.io/apis/environmental-protection-agency/environmental-protection-agency-uvindex-api/)

## Tags

Environment, Air Quality

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/environmental-protection-agency/aqs/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/environmental-protection-agency/.