Highlights
- The Central Phoenix AQS station (040133002) recorded ozone at 74.0 PPB at 7 p.m. Monday, July 13.
- That reading crossed AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone.
- Maricopa County Air Quality Department is the reporting agency; readers can track current conditions and any active alerts on AirNow's Phoenix page.
The Central Phoenix air quality monitoring station recorded ozone at 74.0 parts per billion at 7 p.m. Monday, crossing AirNow's threshold for conditions unhealthy for sensitive groups, according to EPA AirNow hourly data reported by the Maricopa County Air Quality Department.
The same 7 p.m. snapshot at AQS site 040133002 showed carbon monoxide at 0.2 PPM, nitrogen dioxide at 5.0 PPB, and PM10 particulate matter at 54.0 micrograms per cubic meter.
For current conditions, 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 by email or text.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 13/07/2026 20:35
- Maricopa County retrieved 13/07/2026 20:35
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 13/07/2026 20:35. Every claim traces to a source.
