Highlights
- The Central Phoenix air quality station logged PM10 at 191.0 µg/m³ at 4 a.m. Sunday, Aug. 9, 2026.
- That reading crossed AirNow's 'Unhealthy for Sensitive Groups' breakpoint for coarse particulate matter.
- Ozone registered 58.0 ppb; CO and NO2 remained at low levels during the same hour.
- Maricopa County Air Quality Department monitors the station; current conditions and forecasts are available via AirNow's Phoenix page.
The air quality monitor at the Central Phoenix station (AQS site ID 040133002) recorded PM10 at 191.0 µg/m³ during the 4 a.m. hour on Sunday, Aug. 9, 2026, according to the EPA AirNow public hourly aggregate. That reading crossed AirNow's threshold for the 'Unhealthy for Sensitive Groups' category for coarse particulate matter.
The same hour's readings for other pollutants at the station remained low: ozone at 58.0 ppb, nitrogen dioxide at 6.0 ppb, and carbon monoxide at 0.2 ppm, per the EPA AirNow data.
The station is operated by the Maricopa County Air Quality Department, which runs the county's network of air monitoring sites. The department offers a Rapid Response Notification System for residents who want alerts when pollution levels rise at selected monitoring locations.
Readers can track current conditions and any active advisories for the Phoenix area on AirNow's Phoenix forecast page. For health guidance related to elevated PM10 levels, consult Maricopa County Air Quality Department advisories directly.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 09/08/2026 05:45
- Maricopa County retrieved 09/08/2026 05:45
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 09/08/2026 05:45. Every claim traces to a source.
