Highlights
- The Central Phoenix air monitor recorded PM10 at 204.0 micrograms per cubic meter at 9 p.m. Saturday, July 11.
- That reading crossed AirNow's unhealthy-for-sensitive-groups breakpoint for coarse particulate matter.
- Ozone registered 50.0 PPB, NO2 at 2.0 PPB, and CO at 0.2 PPM at the same hour.
- Maricopa County Air Quality Department operates a rapid-response alert system for residents who want text or email notification when pollution levels rise.
The Central Phoenix air quality monitoring station (AQS site ID 040133002) recorded PM10 at 204.0 micrograms per cubic meter at 9 p.m. Saturday, July 11, according to EPA AirNow hourly aggregate data reported by the Maricopa County Air Quality Department. That reading crossed AirNow's unhealthy-for-sensitive-groups breakpoint for coarse particulate matter.
At the same hour, the station recorded ozone at 50.0 PPB, nitrogen dioxide at 2.0 PPB, and carbon monoxide at 0.2 PPM.
Residents can check current conditions and any active advisories for the Phoenix area on AirNow's Phoenix page. Maricopa County also operates a Rapid Response Notification System that sends email or text alerts when a High Pollution Advisory is issued or when dust levels rise at selected monitoring locations.
For health guidance specific to elevated PM10 readings, Maricopa County Air Quality Department is the authoritative local source.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 11/07/2026 22:22
- Maricopa County retrieved 11/07/2026 22:22
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 11/07/2026 22:22. Every claim traces to a source.
