Highlights
- The Fountain Hills air monitor recorded ozone at 75.0 ppb at 10 p.m. Wednesday, per Maricopa County Air Quality Department data.
- That reading crosses AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone.
- Residents can check current conditions and any active advisories on the AirNow Phoenix-area page.
The Maricopa County Air Quality Department reported an ozone reading of 75.0 parts per billion at the Fountain Hills monitoring station (AQS site 040139704) at 10 p.m. Wednesday, July 2. That level crosses the EPA AirNow threshold designated as unhealthy for sensitive groups.
The reading was recorded in the EPA AirNow public hourly aggregate and attributed to the Maricopa County Air Quality Department. Sensitive groups, a category defined by AirNow, face elevated risk at this concentration level.
Residents can monitor current readings and any active advisories for the Phoenix area at AirNow's official Phoenix page. For health guidance specific to this reading, consult the Maricopa County Air Quality Department directly.
Sources
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- 040139704 retrieved 02/07/2026 23:13
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 02/07/2026 23:13. Every claim traces to a source.
