Highlights
- The Fountain Hills air quality station recorded ozone at 79.0 PPB at 1 a.m. on Aug. 11, 2026.
- The reading crossed AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone.
- Maricopa County Air Quality Department operates the station; residents can track current conditions via AirNow's Phoenix-area page.
The Maricopa County Air Quality Department's Fountain Hills monitoring station (AQS site 040139704) recorded ozone at 79.0 parts per billion at 1 a.m. Tuesday, a level that crosses AirNow's threshold for the "Unhealthy for Sensitive Groups" category.
The reading was reported through the EPA AirNow public hourly aggregate. Sensitive groups, which Maricopa County and the Arizona Department of Environmental Quality identify as including children, older adults, and people with heart or lung conditions, face elevated risk at ozone concentrations in this range.
Residents can monitor current readings and any active advisories on AirNow's Phoenix-area page. For guidance specific to Maricopa County, the Air Quality Department can be reached at 602-506-6010, per the town of Fountain Hills' air quality page.
Updated hourly readings for the Fountain Hills station will reflect whether conditions improve through the morning.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 11/08/2026 02:45
- azdeq.gov retrieved 11/08/2026 02:45
- fountainhillsaz.gov retrieved 11/08/2026 02:45
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 11/08/2026 02:45. Every claim traces to a source.
