{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/air-quality/49503/","name":"Air quality for ZIP 49503 — Grand Rapids, MI","description":"Air quality data for ZIP 49503 (Grand Rapids, Michigan), 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":"49503","city":"Grand Rapids","state":"MI","stateFull":"Michigan","county":"Kent County (MI)","countySlug":"kent-county","geo":{"latitude":42.9634,"longitude":-85.6681}},"stateContext":{"topConcern":"Lead pipes (post-Flint), Great Lakes erosion","narrative":"Michigan's LCRR obligations are among the heaviest in the US — Detroit, Flint, Benton Harbor, Lansing all carry significant lead-service-line replacement commitments. Great Lakes shoreline erosion expands FEMA AE zones in some lakefront counties."},"datePublished":"2026-04-24","dateModified":"2026-05-13","canonicalUrl":"https://zipradar.org/topic/air-quality/49503/","zipDashboardUrl":"https://zipradar.org/zip/49503/","zipDashboardApiUrl":"https://zipradar.org/api/zip/49503/","primarySourceUrl":"https://www.airnow.gov/","license":{"content":"CC-BY-4.0","attribution":"zipradar.org — https://zipradar.org/topic/air-quality/49503/"}}