Highlights
- The West Phoenix air quality station logged PM10 at 179.0 µg/m³ at 9 a.m. on Aug. 4, 2026.
- That reading crosses AirNow's Unhealthy for Sensitive Groups breakpoint for coarse particulate matter.
- Maricopa County Air Quality Department operates the station; current conditions and forecasts are posted at AirNow.
The Maricopa County Air Quality Department monitor at West Phoenix (AQS site 040130019) recorded PM10 at 179.0 µg/m³ at 9 a.m. Tuesday, Aug. 4, 2026, according to the EPA AirNow hourly aggregate. That level crosses AirNow's Unhealthy for Sensitive Groups breakpoint for coarse particulate matter.
Other pollutants at the same station and hour were below concern thresholds: ozone at 40.0 ppb, PM2.5 at 19.8 µg/m³, NO2 at 3.0 ppb, and CO at 0.0 ppm.
Residents in sensitive groups, including those with respiratory or heart conditions, the elderly, and children, should consult the AirNow Phoenix-area page for the current forecast and any active advisories. Maricopa County also operates a Rapid Response Notification System for dust and pollution alerts at monitored locations across the valley.
Updated hourly readings for the West Phoenix station are available through the AirNow network.
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 10:48
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 10:48. Every claim traces to a source.
