Highlights
- The Central Phoenix air monitor recorded PM10 at 170.0 micrograms per cubic meter at 1 p.m. on Aug. 4, 2026.
- That reading crosses AirNow's Unhealthy for Sensitive Groups breakpoint for PM10 particulate matter.
- Maricopa County Air Quality Department operates the station; residents can track current conditions and alerts at AirNow.
The Central Phoenix air quality monitor recorded PM10 particulate matter at 170.0 micrograms per cubic meter at 1 p.m. Tuesday, crossing AirNow's Unhealthy for Sensitive Groups breakpoint for that pollutant, according to the EPA AirNow public hourly aggregate.
The reading comes from AQS site 040133002, operated by the Maricopa County Air Quality Department. Other pollutants measured at the station during the same hour were within lower ranges: carbon monoxide at 0.3 parts per million, nitrogen dioxide at 14.0 parts per billion, and ozone at 27.0 parts per billion.
Maricopa County offers a Rapid Response Notification System that sends email and text alerts when a High Pollution Advisory is issued or when dust pollution levels rise at selected monitoring locations. Residents can sign up through the county's air quality page or check the Rapid Response Notifications portal.
For current forecast conditions and any active advisories for the Phoenix area, the AirNow Phoenix page is updated hourly. Health guidance for sensitive groups should be sought from Maricopa County Air Quality Department directly.
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 14:48
- Maricopa County retrieved 04/08/2026 14:48
- Maricopa County retrieved 04/08/2026 14:48
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 14:48. Every claim traces to a source.
