Highlights
- The West Phoenix air monitoring station recorded ozone at 76.0 PPB at midnight July 3, crossing the unhealthy-for-sensitive-groups threshold.
- The reading was logged by the EPA AirNow network at AQS site 040130019 and reported by Maricopa County Air Quality Department.
- Residents can track current conditions and any active alerts on the AirNow Phoenix-area forecast page.
- CO, NO2, PM10, and PM2.5 readings at the same station and hour remained within normal ranges.
Ozone at the West Phoenix air monitoring station hit 76.0 parts per billion at midnight on July 3, crossing AirNow's threshold for conditions considered unhealthy for sensitive groups, according to EPA AirNow hourly aggregate data reported by the Maricopa County Air Quality Department.
The reading came from AQS site 040130019. Other pollutants measured at the same station during the same hour were within normal ranges: carbon monoxide at 0.1 PPM, nitrogen dioxide at 3.0 PPB, PM10 at 8.0 micrograms per cubic meter, and PM2.5 at 2.9 micrograms per cubic meter.
Maricopa County Air Quality Department operates a Rapid Response Notification System that sends email and text alerts when pollution levels rise at selected monitoring locations, including a West Phoenix station at 43rd Avenue and Broadway Road. Residents can sign up through the county's notification page.
For current readings, forecast conditions, and any active advisories for the Phoenix area, the AirNow Phoenix page is updated hourly.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040130019 retrieved 03/07/2026 01:13
- Maricopa County retrieved 03/07/2026 01:13
- Maricopa County retrieved 03/07/2026 01:13
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 03/07/2026 01:13. Every claim traces to a source.
