Highlights
- Central Phoenix ozone reached 77.0 PPB at 8 p.m. Thursday, crossing AirNow's Unhealthy for Sensitive Groups threshold.
- The reading comes from AQS site 040133002, reported by the Maricopa County Air Quality Department via EPA AirNow.
- CO registered 0.3 PPM, NO2 at 4.0 PPB, and PM10 at 31.0 micrograms per cubic meter in the same hour.
- Readers can track current conditions and any active advisories at AirNow's Phoenix-area page.
Ozone at the Central Phoenix air monitoring station hit 77.0 PPB at 8 p.m. Thursday, according to the Maricopa County Air Quality Department via the EPA AirNow hourly aggregate. That reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for ozone.
The same hour's snapshot at AQS site 040133002 showed CO at 0.3 PPM, NO2 at 4.0 PPB, and PM10 at 31.0 micrograms per cubic meter.
Maricopa County operates a rapid-response notification system for high-pollution advisories; residents can sign up for email and text alerts through the county's air quality page. Current conditions, forecasts, and any active alerts for the Phoenix area are available at AirNow. For health guidance, refer to Maricopa County Air Quality Department advisories.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 27/08/2026 21:21
- Maricopa County retrieved 27/08/2026 21:21
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 27/08/2026 21:21. Every claim traces to a source.
