Highlights
- The West Phoenix air monitoring station recorded ozone at 78.0 PPB at 6 p.m. Thursday, July 23.
- That level crosses AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone.
- Maricopa County Air Quality Department is the reporting agency; current conditions are posted at AirNow's Phoenix page.
The West Phoenix air monitoring station (AQS site ID 040130019) recorded ozone at 78.0 PPB at 6 p.m. Thursday, crossing AirNow's threshold for Unhealthy for Sensitive Groups, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department.
Other pollutants at the station during the same hour: carbon monoxide at 0.1 PPM, nitrogen dioxide at 4.0 PPB, PM10 at 6.0 UG/M3, and PM2.5 at 2.0 UG/M3.
Readers seeking current forecasts or active advisories for the Phoenix area can check AirNow's Phoenix page directly. For health guidance, Maricopa County Air Quality Department maintains alert sign-ups and advisory information at maricopa.gov/1244/Air-Quality.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040130019 retrieved 23/07/2026 19:17
- Maricopa County retrieved 23/07/2026 19:17
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 23/07/2026 19:17. Every claim traces to a source.
