Highlights
- The West Phoenix air monitor recorded ozone at 71.0 PPB at 6 p.m. on July 2, crossing AirNow's Unhealthy for Sensitive Groups breakpoint.
- Carbon monoxide, nitrogen dioxide, PM10, and PM2.5 readings at the same station remained well below alert thresholds.
- Maricopa County Air Quality Department is the reporting agency; residents can track current conditions and forecasts at AirNow's Phoenix page.
The West Phoenix air quality monitor recorded ozone at 71.0 parts per billion at 6 p.m. Thursday, crossing AirNow's Unhealthy for Sensitive Groups breakpoint for ozone, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department.
The reading came from AQS site ID 040130019. Other pollutants at the same station and hour remained below alert thresholds: carbon monoxide at 0.1 parts per million, nitrogen dioxide at 6.0 parts per billion, PM10 at 17.0 micrograms per cubic meter, and PM2.5 at 5.1 micrograms per cubic meter.
For current conditions, active alerts, and the Phoenix-area forecast, the AirNow Phoenix page is updated hourly. Health guidance for sensitive groups is available through the Maricopa County Air Quality Department.
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 19:13
- Maricopa County retrieved 02/07/2026 19:13
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 19:13. Every claim traces to a source.
