Highlights
- South Scottsdale's air quality monitor logged PM10 at 317.0 micrograms per cubic meter at 9 p.m. Tuesday, Aug. 4.
- The reading crossed AirNow's 'Unhealthy for Sensitive Groups' breakpoint for coarse particulate matter.
- Ozone at the same station read 56.0 parts per billion during the same hour.
- Maricopa County Air Quality Department is the reporting agency; current Phoenix-area conditions are tracked at AirNow.
AIR QUALITY ALERT: The South Scottsdale air monitoring station (AQS site 040133003) recorded PM10 at 317.0 micrograms per cubic meter at 9 p.m. Tuesday, Aug. 4, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department. That reading crossed AirNow's threshold for the 'Unhealthy for Sensitive Groups' category or worse for coarse particulate matter.
Ozone at the same station registered 56.0 parts per billion during the same hour.
The Maricopa County Air Quality Department issues High Pollution Advisories and operates email and text alert subscriptions for residents who want notification when dust pollution levels rise at selected monitoring locations. For current forecast conditions and any active advisories across the Phoenix area, the AirNow Phoenix page is updated hourly.
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 22:48
- Maricopa County retrieved 04/08/2026 22:48
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 22:48. Every claim traces to a source.
