Highlights
- The South Scottsdale monitoring station (AQS 040133003) recorded PM10 at 364.0 UG/M3 at 7 a.m. Tuesday, Aug. 4.
- That reading exceeds AirNow's unhealthy-for-sensitive-groups breakpoint for PM10 particulate matter.
- Ozone at the same station measured 44.0 PPB during the same hour.
- Maricopa County Air Quality Department is the reporting agency; current Phoenix-area conditions are tracked at AirNow.
The South Scottsdale air quality monitoring station logged PM10 particulate matter at 364.0 UG/M3 at 7 a.m. Tuesday, Aug. 4, crossing AirNow's unhealthy-for-sensitive-groups threshold for that pollutant, according to data published by the EPA AirNow public hourly aggregate and reported by the Maricopa County Air Quality Department.
The station, identified by AQS site ID 040133003, also recorded ozone at 44.0 PPB during the same hour. The PM10 figure is the reading that triggered the alert designation.
Readers seeking current forecasts, active advisories, or health guidance for the Phoenix area can visit the AirNow Phoenix page. For any official health guidance, the Maricopa County Air Quality Department is the authoritative local source.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133003 retrieved 04/08/2026 08:48
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 08:48. Every claim traces to a source.
