Highlights
- The West Phoenix monitoring station recorded PM10 at 524.0 micrograms per cubic meter at 4 a.m. on July 13.
- PM2.5 also registered at 52.8 micrograms per cubic meter, crossing the unhealthy-for-sensitive-groups threshold.
- Maricopa County Air Quality Department operates the station; current conditions and forecasts are available via AirNow.
- Residents can sign up for High Pollution Advisory alerts through the Maricopa County Air Quality Department.
The Maricopa County Air Quality Department monitoring station in West Phoenix recorded a PM10 concentration of 524.0 micrograms per cubic meter at 4 a.m. Monday, July 13, crossing AirNow's unhealthy-for-sensitive-groups threshold for that pollutant, according to the EPA AirNow public hourly aggregate.
PM2.5 at the same station registered 52.8 micrograms per cubic meter during the same hour, also above the unhealthy-for-sensitive-groups breakpoint. Other pollutants recorded at the station included ozone at 50.0 parts per billion, nitrogen dioxide at 3.0 parts per billion, and carbon monoxide at 0.2 parts per million.
The station's AQS site ID is 040130019. Readings are sourced from files.airnowtech.org and reflect conditions at 4 a.m. local time.
Current Phoenix-area air quality conditions, forecasts, and any active alerts are available through AirNow's Phoenix page. Maricopa County residents can enroll in High Pollution Advisory email and text notifications through the Maricopa County Air Quality Department. A rapid-response notification system for dust pollution spikes at selected monitoring locations is also available through the county's alert portal.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040130019 retrieved 13/07/2026 05:35
- Maricopa County retrieved 13/07/2026 05:35
- Maricopa County retrieved 13/07/2026 05:35
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 13/07/2026 05:35. Every claim traces to a source.
