{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/air-quality/04401/","name":"Air quality for ZIP 04401 — Bangor (ME), ME","description":"Air quality data for ZIP 04401 (Bangor (ME), Maine), sourced from EPA Air Quality System (AQS), annual county summary.","topic":{"slug":"air-quality","label":"Air quality","source":"EPA Air Quality System (AQS), annual county summary","sourceUrl":"https://aqs.epa.gov/aqsweb/airdata/download_files.html","refreshCadence":"Annual (EPA AQS publication)","summary":"Pages show the 2025 median AQI category (Good, Moderate, Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, Hazardous) for the ZIP's county, plus the year's max/90th-percentile AQI and day-count breakdown by category.","limitations":"This is a county-level ANNUAL SUMMARY, not a live current reading and not an address-level measurement — for today's AQI, EPA's real-time AirNow feed is the correct source (not yet federated here). Not every county operates an EPA monitor; absence of data for a ZIP's county means no 2025 EPA reading exists, not that air is good."},"place":{"zip":"04401","city":"Bangor (ME)","state":"ME","stateFull":"Maine","county":"Penobscot County","countySlug":"penobscot-county","geo":{"latitude":44.8016,"longitude":-68.7712}},"stateContext":{"topConcern":"Radon, lead in older housing, coastal flood","narrative":"Maine has Zone 1 radon statewide. Older housing stock carries lead-paint + lead-service-line risk in Portland, Lewiston, Bangor. Coastal AE/VE FEMA zones face Risk Rating 2.0 premium increases."},"radonZone":null,"airQuality":{"year":2025,"medianAqi":33,"medianCategory":"Good","maxAqi":170,"p90Aqi":58,"daysWithAqi":355,"goodDays":299,"moderateDays":50,"usgDays":5,"unhealthyDays":1,"veryUnhealthyDays":0,"hazardousDays":0,"classification":"county-level ANNUAL summary — not a live current reading, not an address-level measurement","caveat":"This is a county-level ANNUAL SUMMARY for 2025, not a live current reading. For today's air quality, check a real-time monitor at airnow.gov. Categories follow EPA's official AQI breakpoints."},"waterQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/air-quality/04401/","zipDashboardUrl":"https://zipradar.org/zip/04401/","zipDashboardApiUrl":"https://zipradar.org/api/zip/04401/","primarySourceUrl":"https://aqs.epa.gov/aqsweb/airdata/download_files.html","license":{"content":"CC-BY-4.0","attribution":"zipradar.org — https://zipradar.org/topic/air-quality/04401/"}}