Highlights
- The Fountain Hills air monitor recorded ozone at 75.0 PPB at midnight on Aug. 9, 2026.
- That reading crossed AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone.
- Maricopa County Air Quality Department is the reporting agency; residents can track current conditions via AirNow.
- Those with respiratory or heart conditions are the population most affected at this threshold.
The Maricopa County Air Quality Department recorded ozone at 75.0 parts per billion at the Fountain Hills monitoring station (AQS site ID 040139704) at midnight on Aug. 9, 2026, crossing AirNow's threshold for the 'Unhealthy for Sensitive Groups' category.
The reading was reported through the EPA AirNow public hourly aggregate. Maricopa County Air Quality is the reporting agency for the station. Residents seeking current readings, forecasts, and any active advisories for the Phoenix area can check the AirNow Phoenix page directly. For county-specific guidance, the Fountain Hills Air Quality and Dust Control page directs residents to Maricopa County Air Quality at 602-506-6010.
Check the AirNow Phoenix forecast for updated readings as conditions develop through the day.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 09/08/2026 01:45
- fountainhillsaz.gov retrieved 09/08/2026 01:45
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 09/08/2026 01:45. Every claim traces to a source.
