Highlights
- The South Scottsdale station (AQS 040133003) logged PM10 at 310.0 UG/M3 at 3 a.m. Tuesday, July 21.
- The reading crossed AirNow's 'Unhealthy for Sensitive Groups' threshold for particulate matter.
- Ozone at the same station registered 53.0 PPB during the same hour.
- Maricopa County Air Quality Department is the reporting agency; current conditions are available on AirNow.
The South Scottsdale air monitoring station recorded PM10 particulate matter at 310.0 micrograms per cubic meter at 3 a.m. Tuesday, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department. The reading crossed AirNow's threshold for the 'Unhealthy for Sensitive Groups' category or worse for PM10.
The same station (AQS site ID 040133003) recorded ozone at 53.0 PPB during the same hour.
Maricopa County Air Quality Department is the reporting agency for this station. Residents seeking current forecasts, active advisories, or health guidance should consult the AirNow Phoenix-area page or the Maricopa County Air Quality Department, which also offers email and text alerts when a High Pollution Advisory is issued or when dust pollution levels rise at selected monitoring locations.
Updated hourly readings for the South Scottsdale station are available through the AirNow feed as conditions develop.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133003 retrieved 21/07/2026 04:19
- Maricopa County retrieved 21/07/2026 04:19
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 21/07/2026 04:19. Every claim traces to a source.
