Highlights
- The West Phoenix air quality station logged PM10 at 238.0 micrograms per cubic meter at 3 p.m. Sunday.
- That reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for PM10 particulate matter.
- PM2.5 at the same station registered 25.4 micrograms per cubic meter during the same hour.
- Maricopa County Air Quality Department is the reporting agency; current conditions are tracked at AirNow's Phoenix page.
The Maricopa County Air Quality Department monitoring station in West Phoenix recorded PM10 particulate matter at 238.0 micrograms per cubic meter at 3 p.m. Sunday, July 12, crossing AirNow's Unhealthy for Sensitive Groups breakpoint for that pollutant.
The same station recorded PM2.5 at 25.4 micrograms per cubic meter during the same hour. Other readings at the site included ozone at 34.0 parts per billion, nitrogen dioxide at 1.0 part per billion, and carbon monoxide at 0.2 parts per million.
The data originates from EPA AirNow's public hourly aggregate, reported under AQS site ID 040130019. Maricopa County operates a Rapid Response Notification System for dust and pollution alerts at select monitoring locations across the valley.
Current forecasts and any active advisories for the Phoenix area are available at AirNow's Phoenix page. For health guidance specific to this reading, consult Maricopa County Air Quality Department directly.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040130019 retrieved 12/07/2026 16:35
- Maricopa County retrieved 12/07/2026 16:35
Authored by The Scottsdale Signal. Drafted by AI from primary-source material under our beat-specific editorial guides; reviewed by humans before publish under our five-gate process. Sources retrieved at 12/07/2026 16:35. Every claim traces to a source.
