Highlights
- The West Phoenix air monitoring station recorded ozone at 81.0 PPB at 9 p.m. on July 2, crossing AirNow's Unhealthy for Sensitive Groups breakpoint.
- Carbon monoxide, nitrogen dioxide, PM2.5, and PM10 readings at the same station remained well within normal ranges at that hour.
- Maricopa County Air Quality Department is the reporting agency; residents can track current conditions and active alerts via AirNow's Phoenix-area page.
The West Phoenix air monitoring station (AQS site ID 040130019) recorded ozone at 81.0 parts per billion at 9 p.m. Wednesday, July 2, crossing AirNow's threshold for Unhealthy for Sensitive Groups, according to EPA AirNow hourly aggregate data reported by the Maricopa County Air Quality Department.
Other pollutants at the station during the same hour showed no elevated readings: carbon monoxide came in at 0.1 parts per million, nitrogen dioxide at 3.0 PPB, PM10 at 12.0 micrograms per cubic meter, and PM2.5 at 3.0 micrograms per cubic meter.
For current forecasts and any active advisories, the AirNow Phoenix-area page is updated hourly. Health guidance for sensitive groups, including those with respiratory conditions, is available through the Maricopa County Air Quality Department. Residents can also sign up for High Pollution Advisory alerts and dust-event notifications through the county's rapid-response notification system.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040130019 retrieved 02/07/2026 22:13
- Maricopa County retrieved 02/07/2026 22:13
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 02/07/2026 22:13. Every claim traces to a source.
