Highlights
- The Fountain Hills AQS monitor (site 040139704) recorded ozone at 81.0 PPB at 9 p.m. on Aug. 10.
- That reading crosses AirNow's Unhealthy for Sensitive Groups breakpoint for ozone, per Maricopa County Air Quality Department data.
- Residents can check current conditions and active alerts on the AirNow Phoenix-area page.
The ozone monitor at Fountain Hills recorded 81.0 parts per billion at 9 p.m. Monday, Aug. 10, crossing EPA AirNow's Unhealthy for Sensitive Groups breakpoint for ozone, according to data reported by the Maricopa County Air Quality Department from AQS site 040139704.
The reading was sourced from EPA AirNow's public hourly aggregate. Maricopa County Air Quality Department is the reporting agency for the Fountain Hills station.
Residents, particularly those in sensitive groups, can monitor current conditions and any active advisories on the AirNow Phoenix-area page. For health guidance specific to the reading, contact the Maricopa County Air Quality Department directly.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 10/08/2026 22:45
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 10/08/2026 22:45. Every claim traces to a source.
