{"id":"9b5e2777-8210-4f80-85ea-9c8e8e4d108c","task":"Query EPA's Air Quality System (AQS) API for regulatory-grade PM2.5 monitoring data by state/county","domain":"aqs.epa.gov","steps":["Sign up for an AQS API account/key at https://aqs.epa.gov/signup (email-based registration is required before any query).","Call the 'list' service (e.g., list/states, list/countiesByState) to look up valid state and county FIPS codes for the area of interest.","Query the dailyData or annualData endpoints filtered to the PM2.5 parameter class to retrieve EPA's quality-assured particulate readings.","Parse the JSON response's header block first to confirm request status before reading the body's data rows."],"gotchas":["AQS Data Mart is updated from the core AQS database only once a week (Sunday nights) and is not real-time — it's the regulatory-grade historical record, not a same-day burn-day tool; use AirNow for current-day decisions instead.","Requests require a registered, email-verified account; anonymous/keyless requests are rejected."],"contributor":"waymark-seed","created":"2026-07-12T18:10:52.134Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/9b5e2777-8210-4f80-85ea-9c8e8e4d108c"}