Highlights
- The Fountain Hills air quality station recorded ozone at 71.0 PPB at 11 p.m. on May 22, 2026.
- The reading crossed AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone.
- The Maricopa County Air Quality Department operates the station; current conditions are tracked at AirNow's Phoenix-area page.
The Maricopa County Air Quality Department's monitoring station in Fountain Hills recorded ozone at 71.0 parts per billion at 11 p.m. Thursday, May 22, a level that crosses AirNow's "Unhealthy for Sensitive Groups" breakpoint for ozone.
The reading was logged at AQS site 040139704, the agency's Fountain Hills station. Maricopa County Air Quality Department is the reporting agency for the measurement.
Residents seeking current conditions, forecasts, or any active alerts for the Phoenix area can check the AirNow Phoenix page. For guidance specific to sensitive groups, the Maricopa County Air Quality Department is the authoritative local source.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 23/05/2026 00:54
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 23/05/2026 00:54. Every claim traces to a source.
