Highlights
- The South Scottsdale air quality station recorded PM10 at 370.0 UG/M3 at 6 p.m. Tuesday, Aug. 4.
- That reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for PM10 particulate matter.
- Ozone at the same station registered 44.0 PPB during the same hour.
- Maricopa County Air Quality Department is the reporting agency; current conditions are tracked at AirNow's Phoenix-area page.
AIR QUALITY ALERT: The South Scottsdale monitoring station (AQS site ID 040133003) recorded PM10 particulate matter at 370.0 UG/M3 at 6 p.m. Tuesday, Aug. 4, according to EPA AirNow hourly aggregate data reported by the Maricopa County Air Quality Department. That reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for PM10.
Ozone at the same station registered 44.0 PPB during the same hour, per the same dataset.
Residents can track current conditions and any active advisories for the Phoenix area through AirNow's official Phoenix-area page. For health guidance specific to Maricopa County, the Maricopa County Air Quality Department is the authoritative source. Readings are 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 19:48
- Maricopa County retrieved 04/08/2026 19:48
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 19:48. Every claim traces to a source.
