Highlights
- The West Phoenix air monitor recorded ozone at 77.0 PPB at 8 p.m. on July 2, crossing AirNow's Unhealthy for Sensitive Groups breakpoint.
- Maricopa County Air Quality Department is the reporting agency for AQS site 040130019.
- Residents can track current conditions and active alerts on AirNow's Phoenix-area page.
The West Phoenix air monitoring station recorded ozone at 77.0 parts per billion at 8 p.m. Wednesday, July 2, crossing AirNow's threshold for Unhealthy for Sensitive Groups, according to data published by the EPA AirNow public hourly aggregate and reported by the Maricopa County Air Quality Department.
The reading comes from AQS site 040130019. Other pollutants recorded at the same station and hour: carbon monoxide at 0.1 PPM, nitrogen dioxide at 2.0 PPB, PM10 at 12.0 micrograms per cubic meter, and PM2.5 at 1.4 micrograms per cubic meter.
For current forecasts, active advisories, and health guidance, Maricopa County Air Quality Department directs residents to the AirNow Phoenix-area page. The county's Rapid Response Notification System allows residents to sign up for email and text alerts when pollution levels rise at selected monitoring locations.
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 21:13
- Maricopa County retrieved 02/07/2026 21:13
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 21:13. Every claim traces to a source.
