Highlights
- The Central Phoenix air monitor recorded PM10 at 823.0 micrograms per cubic meter at 4 a.m. on July 13, 2026.
- The reading crossed AirNow's 'Unhealthy for Sensitive Groups' breakpoint for PM10, reported by the Maricopa County Air Quality Department.
- Other pollutants at the same station — CO, NO2, and ozone — remained within normal ranges at the same hour.
- Readers can check current conditions and any active advisories at AirNow's Phoenix-area page.
The air quality monitor at Central Phoenix (AQS site ID 040133002) recorded a PM10 concentration of 823.0 micrograms per cubic meter at 4 a.m. Monday, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department. That reading crossed AirNow's threshold for 'Unhealthy for Sensitive Groups' or worse for coarse particulate matter.
Other pollutants at the same station during the same hour showed no comparable spikes: carbon monoxide registered 0.1 PPM, nitrogen dioxide 5.0 PPB, and ozone 45.0 PPB.
Maricopa County operates a Rapid Response Notification System that sends email and text alerts when a High Pollution Advisory is issued or when dust levels rise at selected monitoring locations. Residents can sign up through the Maricopa County Air Quality Department.
For current conditions, forecast, and any active advisories across the Phoenix metro, the AirNow Phoenix-area page is updated hourly. Any health guidance specific to this reading should be sought from 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 05:35
- Maricopa County retrieved 13/07/2026 05:35
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 05:35. Every claim traces to a source.
