Highlights
- The Fountain Hills air monitoring station recorded ozone at 85.0 PPB at 11 p.m. on July 3, 2026.
- That reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for ozone.
- The reading was reported by the Maricopa County Air Quality Department via the EPA AirNow network.
- Residents can check current conditions and any active alerts at AirNow's Phoenix-area page.
The Maricopa County Air Quality Department's monitoring station in Fountain Hills recorded ozone at 85.0 parts per billion at 11 p.m. Thursday, July 3, crossing AirNow's threshold for the Unhealthy for Sensitive Groups category.
The reading was logged at AQS site 040139704 and reported through the EPA AirNow public hourly aggregate. Sensitive groups, which Maricopa County Air Quality and the Arizona Department of Environmental Quality identify as including children, older adults, and people with heart or lung disease, face elevated risk at this level.
Current conditions and any active advisories for the Phoenix area are available at AirNow's Phoenix page. Maricopa County also offers email and text alerts for High Pollution Advisories at its air quality portal.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 04/07/2026 00:27
- Maricopa County retrieved 04/07/2026 00:27
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 04/07/2026 00:27. Every claim traces to a source.
