Highlights
- West Phoenix AQS site 040130019 recorded PM10 at 245.0 UG/M3 at 5 a.m. Tuesday, July 7.
- The reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for PM10.
- PM2.5 also registered at 37.4 UG/M3, likewise in the Unhealthy for Sensitive Groups range.
- Maricopa County Air Quality Department is the reporting agency; current Phoenix-area conditions are at AirNow.
The Maricopa County Air Quality Department's West Phoenix monitoring station recorded PM10 at 245.0 UG/M3 at 5 a.m. Tuesday, July 7, crossing AirNow's Unhealthy for Sensitive Groups breakpoint for that pollutant, according to the EPA AirNow public hourly aggregate.
PM2.5 at the same station and hour came in at 37.4 UG/M3, also in the Unhealthy for Sensitive Groups range. Carbon monoxide registered at 0.4 PPM, nitrogen dioxide at 23.0 PPB, and ozone at 10.0 PPB.
The station's AQS site ID is 040130019. Maricopa County Air Quality Department is the reporting agency for the reading.
Readers can track current Phoenix-area air quality conditions and any active advisories at AirNow's Phoenix forecast page. Maricopa County also operates a Rapid Response Notification System for dust and pollution alerts at specific monitoring locations across the valley. For health guidance tied to elevated readings, 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.
- 040130019 retrieved 07/07/2026 06:24
- Maricopa County retrieved 07/07/2026 06:24
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 07/07/2026 06:24. Every claim traces to a source.
