Highlights
- Central Phoenix air monitor recorded PM10 at 324.0 µg/m³ at 3 p.m. Tuesday, Aug. 4, 2026.
- The reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for PM10 particulate matter.
- Maricopa County Air Quality Department operates the station; current conditions and alerts are posted at AirNow's Phoenix page.
The Maricopa County Air Quality Department's Central Phoenix monitoring station (AQS site ID 040133002) recorded PM10 particulate matter at 324.0 µg/m³ at 3 p.m. Tuesday, Aug. 4, crossing AirNow's Unhealthy for Sensitive Groups breakpoint for that pollutant.
The same 3 p.m. snapshot showed nitrogen dioxide at 8.0 parts per billion and ozone at 36.0 parts per billion at the same station.
Maricopa County operates a Rapid Response Notification System for dust pollution alerts at selected monitoring locations, and residents can sign up for email or text alerts through the county's Air Quality page. Any health guidance tied to this reading should be sourced directly from Maricopa County Air Quality Department.
Current readings and any active advisories for the Phoenix area are available at AirNow; conditions may change as the afternoon progresses.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133002 retrieved 04/08/2026 16:48
- Maricopa County retrieved 04/08/2026 16:48
- Maricopa County retrieved 04/08/2026 16:48
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 04/08/2026 16:48. Every claim traces to a source.
