Highlights
- The West Phoenix air monitoring station recorded ozone at 77.0 PPB at 7 p.m. Saturday, June 20.
- That reading crosses AirNow's Unhealthy for Sensitive Groups breakpoint for ozone.
- Maricopa County Air Quality Department is the reporting agency; current conditions and forecasts are available at AirNow's Phoenix page.
The West Phoenix air monitoring station (AQS site ID 040130019) recorded ozone at 77.0 PPB at 7 p.m. Saturday, June 20, according to EPA AirNow hourly data reported by the Maricopa County Air Quality Department. That reading crosses AirNow's Unhealthy for Sensitive Groups breakpoint for ozone.
Other pollutants at the same station and hour: carbon monoxide at 0.1 PPM, nitrogen dioxide at 4.0 PPB, PM10 at 17.0 micrograms per cubic meter, and PM2.5 at 3.1 micrograms per cubic meter.
The Maricopa County Air Quality Department operates a Rapid Response Notification System that sends email and text alerts when High Pollution Advisories are issued or when dust levels rise at selected monitoring locations across the county.
Readers can track current readings and any active advisories for the Phoenix area at AirNow's Phoenix forecast page. For health guidance specific to this reading, consult the Maricopa County Air Quality Department directly.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040130019 retrieved 20/06/2026 20:56
- Maricopa County retrieved 20/06/2026 20:56
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 20/06/2026 20:56. Every claim traces to a source.
