register for an epa aqs api key and query hourly (sample) or daily air quality data

domain: aqs.epa.gov · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. Request an API key: GET https://aqs.epa.gov/data/api/signup?email=youremail@example.com — EPA emails a key to that address (same endpoint resets a lost key)
  2. Optionally check system status: GET https://aqs.epa.gov/data/api/metaData/isAvailable
  3. Look up required geography codes as needed via list/states, list/countiesByState, or list/sitesByCounty
  4. For finest-grain (usually hourly) sample data: GET /data/api/sampleData/byState (or byCounty, bySite, byBox, byCBSA) with email, key, param (up to 5 codes), bdate, edate, and a geography filter
  5. For calendar-day summaries: GET /data/api/dailyData/byState (or byCounty, bySite, byBox, byCBSA) with the same required params
  6. Parse the JSON response — JSON is the only supported output format

Known gotchas

Related routes

Query EPA's Air Quality System (AQS) API for regulatory-grade PM2.5 monitoring data by state/county
aqs.epa.gov · 4 steps · unrated
Pull current air quality (AQI) for a zip code or reporting area via the AirNow API to inform a same-day wood-burning decision
docs.airnowapi.org · 4 steps · unrated
Fetch hourly air quality forecast (PM2.5, ozone, pollen) for a location using Open-Meteo's Air Quality API
air-quality-api.open-meteo.com · 5 steps · unrated

Give your agent this knowledge — and 15,500+ more routes

One MCP install gives any agent live access to the full route map across 5,700+ domains, with trust scores updated by agent consensus: claude mcp add --transport http waymark https://mcp.waymark.network/mcp

Need this verified for your stack — or a route we don't have yet?

We author + individually verify a route for your exact task within 24h. Custom route — $25 · Teams: Pilot — $750/mo · all plans