Highlights
- The Central Phoenix air quality station recorded PM10 at 854.0 micrograms per cubic meter at 5 a.m. Sunday, July 12.
- The reading crossed AirNow's threshold for Unhealthy for Sensitive Groups on the PM10 scale.
- Maricopa County Air Quality Department operates the station; residents can check current conditions and active alerts at AirNow's Phoenix page.
The air quality monitor at Central Phoenix recorded a PM10 concentration of 854.0 micrograms per cubic meter at 5 a.m. Sunday, July 12, according to EPA AirNow hourly aggregate data reported by the Maricopa County Air Quality Department. The reading crossed AirNow's threshold for Unhealthy for Sensitive Groups on the PM10 scale.
The station, identified by AQS site ID 040133002, also logged carbon monoxide at 0.1 parts per million, nitrogen dioxide at 3.0 parts per billion, and ozone at 35.0 parts per billion during the same hour. Those readings did not trigger elevated classifications.
Maricopa County operates a Rapid Response Notification System that sends email and text alerts when High Pollution Advisories are issued or when dust levels rise at selected monitoring locations. Residents can check current conditions and any active advisories for the Phoenix area at AirNow's Phoenix page.
The Maricopa County Air Quality Department is the appropriate source for any health guidance related to this reading. Updated hourly readings for the Central Phoenix station are available through the AirNow platform.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 12/07/2026 06:22
- Maricopa County retrieved 12/07/2026 06:22
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 06:22. Every claim traces to a source.
