{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/air-quality/85004/","name":"Air quality for ZIP 85004 — Phoenix, AZ","description":"Air quality data for ZIP 85004 (Phoenix, Arizona), 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":"85004","city":"Phoenix","state":"AZ","stateFull":"Arizona","county":"Maricopa County","countySlug":"maricopa-county","geo":{"latitude":33.4488,"longitude":-112.074}},"stateContext":{"topConcern":"Radon, wildfire-WUI, water rights","narrative":"Arizona has Zone 1 radon risk across most of its area per EPA's 1993 map. FEMA NFHL coverage is dense in flood-prone Maricopa + Pima counties; wildfire risk concentrates in Yavapai + Coconino + Cochise. Water-rights and utility-source diversity (CAP allotments vs. local groundwater) varies significantly between metros."},"radonZone":null,"airQuality":{"year":2025,"medianAqi":73,"medianCategory":"Moderate","maxAqi":366,"p90Aqi":101,"daysWithAqi":365,"goodDays":32,"moderateDays":295,"usgDays":32,"unhealthyDays":3,"veryUnhealthyDays":1,"hazardousDays":2,"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":"2026-09-15","canonicalUrl":"https://zipradar.org/topic/air-quality/85004/","zipDashboardUrl":"https://zipradar.org/zip/85004/","zipDashboardApiUrl":"https://zipradar.org/api/zip/85004/","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/85004/"}}