Highlights
- The West Phoenix AirNow monitoring station recorded ozone at 76.0 PPB at 9 p.m. on July 22, 2026.
- The reading crossed the AirNow Unhealthy for Sensitive Groups breakpoint for ozone.
- Maricopa County Air Quality Department is the reporting agency; current conditions and forecasts are available at AirNow.
The EPA AirNow monitoring station at West Phoenix (AQS site ID 040130019) recorded ozone at 76.0 PPB at 9 p.m. Wednesday, July 22, crossing AirNow's Unhealthy for Sensitive Groups breakpoint for ozone, according to the Maricopa County Air Quality Department.
Other pollutants at the same station and hour were within normal ranges: carbon monoxide at 0.1 PPM, nitrogen dioxide at 3.0 PPB, PM10 at 8.0 UG/M3, and PM2.5 at 3.5 UG/M3.
The Maricopa County Air Quality Department operates the monitoring network and issues High Pollution Advisories when conditions warrant. Residents can sign up for email and text alerts through the county's air quality page and can check the Rapid Response Notification System for station-level updates, including a West 43rd Avenue location near the West Phoenix monitoring area.
For the current Phoenix-area forecast and any active advisories, the AirNow Phoenix page is the authoritative source. Health guidance for sensitive groups should be sought from Maricopa County 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 22/07/2026 22:17
- Maricopa County retrieved 22/07/2026 22:17
- Maricopa County retrieved 22/07/2026 22:17
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 22:17. Every claim traces to a source.
