Highlights
- The West Phoenix air monitoring station recorded ozone at 73.0 PPB at 8 p.m. Wednesday, July 22.
- That level crosses AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone.
- Maricopa County Air Quality Department operates the station; residents can track current conditions and forecasts at AirNow's Phoenix page.
The West Phoenix air monitoring station recorded ozone at 73.0 PPB at 8 p.m. Wednesday, crossing AirNow's threshold for conditions rated unhealthy for sensitive groups, according to EPA AirNow hourly data reported by the Maricopa County Air Quality Department.
The station, identified by AQS site ID 040130019, also logged carbon monoxide at 0.1 PPM, nitrogen dioxide at 2.0 PPB, PM10 at 6.0 micrograms per cubic meter, and PM2.5 at 1.6 micrograms per cubic meter during the same hour. Only the ozone reading crossed a caution breakpoint.
Maricopa County Air Quality Department offers a Rapid Response Notification System for residents who want alerts when pollution levels rise at selected monitoring locations, including a West 43rd Avenue station at 43rd Avenue and Broadway Road. Sign-up information is available through the county's notification page.
Current readings, forecasts, and any active advisories for the Phoenix area are available at AirNow's Phoenix page. For health guidance specific to this reading, 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 22/07/2026 21:17
- Maricopa County retrieved 22/07/2026 21:17
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 22/07/2026 21:17. Every claim traces to a source.
