Highlights
- The Central Phoenix air monitor recorded ozone at 71.0 PPB at 7 p.m. on August 3, crossing the Unhealthy for Sensitive Groups threshold.
- Maricopa County Air Quality Department is the reporting agency for the AQS site ID 040133002 reading.
- Readers can check current forecasts and any active alerts on the AirNow Phoenix page.
- CO, NO2, and PM10 readings at the same station and hour remained within lower concern ranges.
The Central Phoenix air quality monitor recorded ozone at 71.0 parts per billion at 7 p.m. Monday, August 3, 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 040133002. At the same hour, carbon monoxide registered 0.2 parts per million, nitrogen dioxide at 4.0 parts per billion, and PM10 particulate matter at 33.0 micrograms per cubic meter.
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 high pollution advisories and dust alerts.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 03/08/2026 20:59
- Maricopa County retrieved 03/08/2026 20:59
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 03/08/2026 20:59. Every claim traces to a source.
