Highlights
- The Fountain Hills AirNow monitoring station recorded ozone at 79.0 PPB at 11 p.m. on Sept. 10, 2026.
- That reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for ozone, per the Maricopa County Air Quality Department.
- Residents with respiratory or cardiovascular conditions should check the AirNow Phoenix-area page for current forecasts and any active advisories.
The EPA AirNow monitoring station in Fountain Hills recorded ozone at 79.0 parts per billion at 11 p.m. Wednesday, Sept. 10, 2026, according to the Maricopa County Air Quality Department. That reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for ozone.
The reading was logged at AQS site ID 040139704, the Fountain Hills station in the EPA's hourly aggregate feed. Maricopa County Air Quality Department manages air quality oversight for the area; residents can reach the department at 602-506-6010 or visit the county's air quality page.
For the current forecast and any active alerts, check the AirNow Phoenix-area page. Health guidance for sensitive groups should be sought from Maricopa County Air Quality Department.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 11/09/2026 00:39
- fountainhillsaz.gov retrieved 11/09/2026 00:39
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 11/09/2026 00:39. Every claim traces to a source.
