Highlights
- The Central Phoenix air quality station logged PM10 at 157.0 micrograms per cubic meter at 1 p.m. Sunday, July 12.
- That reading crosses AirNow's 'Unhealthy for Sensitive Groups' breakpoint for PM10 particulate matter.
- Maricopa County Air Quality Department operates the station; current conditions and active alerts are posted at AirNow's Phoenix page.
The Maricopa County Air Quality Department's Central Phoenix monitoring station (AQS site 040133002) recorded PM10 particulate matter at 157.0 micrograms per cubic meter at 1 p.m. Sunday, July 12, crossing AirNow's threshold for the 'Unhealthy for Sensitive Groups' category.
Other pollutants at the same station and hour were within normal ranges: carbon monoxide at 0.2 parts per million, nitrogen dioxide at 4.0 parts per billion, and ozone at 28.0 parts per billion.
The reading is reported through the EPA AirNow public hourly aggregate. Maricopa County Air Quality Department operates the station and issues guidance when elevated readings persist. Residents can sign up for High Pollution Advisory alerts and dust-level notifications through the county's air quality page. Current forecast conditions and any active alerts for the Phoenix area are available at AirNow.
The Maricopa County Rapid Response Notification System also provides station-level dust alerts for selected monitoring locations across the county.
Updated hourly readings for the Phoenix area are available at AirNow; the next hourly update is expected at 2 p.m.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 12/07/2026 14:35
- Maricopa County retrieved 12/07/2026 14:35
- Maricopa County retrieved 12/07/2026 14:35
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 12/07/2026 14:35. Every claim traces to a source.
