Highlights
- The Fountain Hills air quality station recorded ozone at 74.0 PPB at 10 p.m. Monday, July 14.
- That 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 monitoring station in Fountain Hills recorded ozone at 74.0 parts per billion at 10 p.m. Monday, July 14, according to EPA AirNow hourly data. That reading crossed AirNow's unhealthy-for-sensitive-groups breakpoint for ozone.
The station carries AQS site ID 040139704. Sensitive groups, which the Arizona Department of Environmental Quality identifies as including children, older adults, adults exercising outdoors, and people with heart or lung disease, asthma, or bronchitis, face elevated risk at this level.
Current readings and any active advisories for the Phoenix area are available at AirNow's Phoenix page. For guidance specific to Maricopa County, contact the Maricopa County Air Quality Department directly.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
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 14/07/2026 23:52. Every claim traces to a source.
