Highlights
- The West Phoenix air monitoring station recorded PM10 at 232.0 µg/m³ at 4 p.m. on Aug. 4, crossing the unhealthy-for-sensitive-groups threshold.
- Maricopa County Air Quality Department is the reporting agency for the AQS site ID 040130019 reading.
- Residents can track current conditions and active alerts on the AirNow Phoenix-area page.
The West Phoenix air monitoring station recorded PM10 particulate matter at 232.0 µg/m³ at 4 p.m. Tuesday, 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.
The same station (AQS site ID 040130019) logged ozone at 41.0 ppb, PM2.5 at 23.6 µg/m³, and carbon monoxide at 0.1 ppm during the same hour.
For current forecasts and any active advisories, Maricopa County directs residents to the AirNow Phoenix-area page. The county also operates a Rapid Response Notification System for dust and pollution alerts at specific monitoring locations across the metro. Health guidance, if issued, will come from Maricopa County Air Quality Department.
The AirNow Phoenix-area page will reflect updated hourly readings 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.
- 040130019 retrieved 04/08/2026 17:48
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 17:48. Every claim traces to a source.
