Highlights
- Central Phoenix ozone reached 72.0 PPB at 9 p.m. on July 2, crossing AirNow's unhealthy-for-sensitive-groups breakpoint.
- The reading was recorded at AQS site 040133002 and reported by the Maricopa County Air Quality Department.
- Readers can check current forecasts and any active alerts on the AirNow Phoenix page.
- Carbon monoxide, nitrogen dioxide, and PM10 readings at the same station remained at lower levels during the same hour.
Central Phoenix ozone measured 72.0 PPB at 9 p.m. Wednesday, crossing AirNow's threshold for conditions unhealthy for sensitive groups, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department.
The reading came from AQS monitoring station 040133002 in Central Phoenix. Other pollutants logged at the same station during the same hour: carbon monoxide at 0.1 PPM, nitrogen dioxide at 3.0 PPB, and PM10 at 20.0 UG/M3.
For current forecasts and any active advisories, the AirNow Phoenix area page is updated hourly. Maricopa County also operates a Rapid Response Notification System for dust and pollution alerts at specific monitoring locations across the metro. Any health guidance specific to this reading should be sought from Maricopa County Air Quality.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 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.
