Highlights
- PM10 at the Central Phoenix AQS station (040133002) reached 169.0 µg/m³ at 5 a.m. on Aug. 10.
- That reading crosses AirNow's Unhealthy for Sensitive Groups breakpoint for PM10.
- Other pollutants at the station — CO, NO2, and ozone — remained at low levels in the same hour.
- Maricopa County Air Quality Department is the reporting agency; current forecast is available via AirNow.
The Central Phoenix air quality monitoring station recorded a PM10 concentration of 169.0 µg/m³ at 5 a.m. Monday, Aug. 10, according to EPA AirNow hourly data reported by the Maricopa County Air Quality Department. That reading crosses AirNow's Unhealthy for Sensitive Groups breakpoint for PM10 particulate matter.
The same 5 a.m. snapshot at AQS site 040133002 showed carbon monoxide at 0.1 PPM, nitrogen dioxide at 4.0 PPB, and ozone at 57.0 PPB, all at low levels.
Maricopa County operates a Rapid Response Notification System that sends email and text alerts when a High Pollution Advisory is 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.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 10/08/2026 06:45
- Maricopa County retrieved 10/08/2026 06:45
- Maricopa County retrieved 10/08/2026 06:45
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 10/08/2026 06:45. Every claim traces to a source.
