Highlights
- The Fountain Hills air quality station recorded ozone at 74.0 PPB at 11 p.m. Sunday, Aug. 9.
- That reading crossed AirNow's unhealthy-for-sensitive-groups breakpoint for ozone.
- The reading is reported by the Maricopa County Air Quality Department via EPA AirNow.
- Residents can check current conditions and forecasts at the AirNow Phoenix-area page.
The Maricopa County Air Quality Department monitor in Fountain Hills recorded ozone at 74.0 parts per billion at 11 p.m. Sunday, Aug. 9, crossing AirNow's unhealthy-for-sensitive-groups breakpoint for ozone, according to EPA AirNow hourly data for station AQS site ID 040139704.
The reading was reported through the EPA AirNow public hourly aggregate feed. Maricopa County Air Quality is the reporting agency for the Fountain Hills station.
Residents can track current readings and any active advisories for the Phoenix area at the AirNow Phoenix-area forecast page. For guidance specific to Maricopa County, the department can be reached through its website or, per the town of Fountain Hills, at 602-506-6010.
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 00:45
- fountainhillsaz.gov retrieved 10/08/2026 00:45
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 00:45. Every claim traces to a source.
