Highlights
- The Central Phoenix air monitor recorded PM10 at 207.0 µg/m³ at 2 p.m. on Aug. 4, crossing AirNow's Unhealthy for Sensitive Groups breakpoint.
- Other pollutants at the same station — CO at 0.2 PPM, NO2 at 12.0 PPB, ozone at 29.0 PPB — remained at lower levels.
- Maricopa County Air Quality Department operates the station; readers can track current conditions and any active alerts via AirNow's Phoenix page.
The air quality monitor at Central Phoenix recorded PM10 at 207.0 µg/m³ at 2 p.m. Tuesday, Aug. 4, crossing AirNow's Unhealthy for Sensitive Groups threshold for coarse particulate matter, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department.
The reading comes from AQS site ID 040133002. Other pollutants logged at the same station and hour were CO at 0.2 PPM, NO2 at 12.0 PPB, and ozone at 29.0 PPB.
Maricopa County operates a Rapid Response Notification System that sends email and text alerts when dust pollution levels rise at selected monitoring locations, including a South Phoenix station on Central Avenue. Residents can sign up or report an air quality concern through the county's air quality page.
Current conditions and the Phoenix-area forecast are available on AirNow's Phoenix page; the county's notification system page is at maricopa.gov/1628. Check AirNow for any updated advisory issued after the 2 p.m. reading.
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 15:48
- Maricopa County retrieved 04/08/2026 15:48
- Maricopa County retrieved 04/08/2026 15:48
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 15:48. Every claim traces to a source.
