Highlights
- West Phoenix ozone reached 73.0 PPB at 6 p.m. Saturday, crossing AirNow's Unhealthy for Sensitive Groups threshold.
- The reading comes from AQS monitoring station 040130019, reported by the Maricopa County Air Quality Department.
- Residents can track current conditions and active alerts on the AirNow Phoenix-area forecast page.
- Other pollutants at the station — CO at 0.1 PPM, NO2 at 6.0 PPB, PM2.5 at 4.5 UG/M3, PM10 at 41.0 UG/M3 — remained below alert thresholds.
Ozone at the West Phoenix air quality monitor hit 73.0 parts per billion at 6 p.m. Saturday, crossing the threshold that EPA AirNow designates as Unhealthy for Sensitive Groups, according to the hourly aggregate published by the Maricopa County Air Quality Department.
The reading comes from AQS site 040130019 in West Phoenix. Other pollutants recorded at the same station and hour: carbon monoxide at 0.1 PPM, nitrogen dioxide at 6.0 PPB, PM10 at 41.0 micrograms per cubic meter, and PM2.5 at 4.5 micrograms per cubic meter.
Maricopa County Air Quality operates a Rapid Response Notification System that sends email and text alerts when a High Pollution Advisory is issued or when dust levels rise at selected monitoring locations across the county. Residents can sign up through the county's notification page.
For current conditions, forecasts, and any active advisories, the AirNow Phoenix-area page is the authoritative real-time source. Health guidance for sensitive groups should be sought from Maricopa County Air Quality 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 19:56
- Maricopa County retrieved 20/06/2026 19:56
- Maricopa County retrieved 20/06/2026 19:56
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 19:56. Every claim traces to a source.
