Highlights
- The Central Phoenix air quality station logged a PM10 reading of 3,217 µg/m³ at 6 a.m. Tuesday, August 4.
- The reading crossed AirNow's threshold for Unhealthy for Sensitive Groups or worse for PM10 particulate matter.
- Maricopa County Air Quality Department operates the station; residents can check current conditions and active alerts at AirNow.
The air quality monitoring station at Central Phoenix (AQS site ID 040133002), operated by the Maricopa County Air Quality Department, recorded a PM10 concentration of 3,217 µg/m³ at 6 a.m. Tuesday, August 4, according to EPA AirNow hourly aggregate data. That reading crossed AirNow's threshold for Unhealthy for Sensitive Groups or worse for PM10 particulate matter.
Other pollutants logged at the same station and hour were within normal ranges: carbon monoxide at 0.1 PPM, nitrogen dioxide at 1.0 PPB, and ozone at 42.0 PPB.
Maricopa County operates a Rapid Response Notification System that sends email and text alerts when dust pollution levels rise at selected monitoring locations, including a South Phoenix station on Central Avenue. Residents can sign up through the county's notification page.
Current conditions, 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.
- 040133002 retrieved 04/08/2026 07:48
- Maricopa County retrieved 04/08/2026 07:48
- Maricopa County retrieved 04/08/2026 07:48
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 04/08/2026 07:48. Every claim traces to a source.
