Highlights
- The Central Phoenix air quality station logged PM10 at 388.0 micrograms per cubic meter at 8 p.m. Tuesday, Aug. 4.
- The reading crossed AirNow's unhealthy-for-sensitive-groups breakpoint for PM10 particulate matter.
- Maricopa County Air Quality Department operates the station; current conditions and active alerts are posted at AirNow's Phoenix page.
The Maricopa County Air Quality Department monitoring station in Central Phoenix recorded PM10 particulate matter at 388.0 micrograms per cubic meter at 8 p.m. Tuesday, Aug. 4, according to EPA AirNow hourly aggregate data. The reading crossed AirNow's unhealthy-for-sensitive-groups breakpoint for PM10.
The same hour's readings at the station (AQS site ID 040133002) showed carbon monoxide at 0.2 PPM, nitrogen dioxide at 4.0 PPB, and ozone at 51.0 PPB.
Readers can track current conditions and any active advisories for the Phoenix area through AirNow's official Phoenix page. For health guidance tied to elevated particulate readings, the Maricopa County Air Quality Department publishes advisories and a rapid-response notification system at maricopa.gov.
Updated hourly readings for the Central Phoenix station will be reflected on the AirNow dashboard as conditions change.
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 21:48
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 21:48. Every claim traces to a source.
