Health 201 · Data Catalog Public health data · 2026-08-09

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EPA AQS / AirNow / ECHO

EPA

Source homepage Documentation

Access tierOPEN-API Queryable API, automatable end to end.
Access methodREST API
AuthenticationFree API key
RegionUnited States
Topicsair-quality drinking-water enforcement
Finest geographymonitor
Update cadencehourly (as published: hourly-annual)
Statusverified · last checked 2026-08-08
Registry idepa-air

Quirks & gotchas

AQS + AirNow need free keys; ECHO open. EJScreen removed from epa.gov 2025 — use mirrors (PEDP/Harvard).

Related sources on the same topics

CDC Environmental Public Health Tracking
CDC
OSHA enforcement & injury data
US DOL OSHA

Provenance

Catalog contents: 114 public health data sources
Source of record: registry/sources.yaml in the HealthDataWhiz repository
Built: 2026-08-09
Machine-readable: catalog.json (CC-BY, reuse freely)
This entry: epa-air in registry/sources.yaml
Last verified: 2026-08-08

This catalog describes where public health data lives and how to access it. It is not medical advice, and it does not host or redistribute the data itself — always read each source's own documentation, licence, and suppression rules before using it. Access details drift; entries carry the date we last verified them. Sources marked RESTRICTED are listed for reference only — they require an application or data-use agreement and we never automate access to them.