{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/air-quality/97231/","name":"Air quality for ZIP 97231 — Portland (OR, NW Hills), OR","description":"Air quality data for ZIP 97231 (Portland (OR, NW Hills), Oregon), sourced from EPA AirNow.","topic":{"slug":"air-quality","label":"Air quality","source":"EPA AirNow","sourceUrl":"https://www.airnow.gov/","refreshCadence":"Hourly real-time / daily historical","summary":"Pages show the current AQI category (Good, Moderate, Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, Hazardous), the nearest reporting station, and historical averages.","limitations":"Rural ZIPs may not have a nearby monitoring station; zipradar then reports the closest available station with distance context."},"place":{"zip":"97231","city":"Portland (OR, NW Hills)","state":"OR","stateFull":"Oregon","county":"Multnomah County","countySlug":"multnomah-county","geo":{"latitude":45.58,"longitude":-122.77}},"stateContext":{"topConcern":"Wildfire, Cascadia seismic, coastal flood","narrative":"Oregon has high WUI wildfire risk in the Cascades + eastern + southern forests. Cascadia subduction zone shapes long-term seismic risk. Coastal FEMA VE/AE zones; Portland metro carries some LCRR obligations."},"datePublished":"2026-04-24","dateModified":"2026-05-13","canonicalUrl":"https://zipradar.org/topic/air-quality/97231/","zipDashboardUrl":"https://zipradar.org/zip/97231/","zipDashboardApiUrl":"https://zipradar.org/api/zip/97231/","primarySourceUrl":"https://www.airnow.gov/","license":{"content":"CC-BY-4.0","attribution":"zipradar.org — https://zipradar.org/topic/air-quality/97231/"}}