Highlights
- The Central Phoenix monitoring station recorded PM10 at 1,945 micrograms per cubic meter at 3 a.m. Monday.
- The reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for PM10 particulate matter.
- Maricopa County Air Quality Department operates the station; residents can sign up for High Pollution Advisory alerts through the county.
- Current forecasts and active alerts for the Phoenix area are available at AirNow's official Phoenix page.
The air quality monitor at Central Phoenix (AQS site 040133002), operated by the Maricopa County Air Quality Department, recorded a PM10 reading of 1,945 micrograms per cubic meter at 3 a.m. Monday, July 13, according to EPA AirNow hourly aggregate data. That figure crossed AirNow's Unhealthy for Sensitive Groups breakpoint for PM10 particulate matter.
Other pollutants at the same station and hour showed: carbon monoxide at 0.1 PPM, nitrogen dioxide at 2.0 PPB, and ozone at 51.0 PPB.
The reading was reported by the Maricopa County Air Quality Department. The county operates a Rapid Response Notification System that allows residents to sign up for email or text alerts when a High Pollution Advisory is issued or when dust pollution levels rise at selected monitoring locations.
For current Phoenix-area forecasts and any active alerts, see AirNow's official Phoenix page. For health guidance related to air quality events, refer to the Maricopa County Air Quality Department.
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 04:35
- Maricopa County retrieved 13/07/2026 04:35
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 04:35. Every claim traces to a source.
