Highlights
- The Fountain Hills air quality monitor recorded ozone at 75.0 PPB at 1 a.m. on Aug. 19, 2026.
- The reading crossed AirNow's Unhealthy for Sensitive Groups breakpoint for ozone.
- Maricopa County Air Quality Department is the reporting agency for AQS site 040139704.
- Readers can track current conditions and active alerts on AirNow's Phoenix-area page.
The Maricopa County Air Quality Department's Fountain Hills monitoring station recorded ozone at 75.0 parts per billion at 1 a.m. Wednesday, Aug. 19, crossing AirNow's threshold for Unhealthy for Sensitive Groups.
The reading came from AQS site 040139704, the county's station serving the Fountain Hills area. Sensitive groups, including people with respiratory or heart conditions, children, and older adults, are advised to consult official guidance. For health recommendations, contact the Maricopa County Air Quality Department directly at 602-506-6010.
Current conditions, forecasts, and any active advisories for the Phoenix metro are available on AirNow's Phoenix-area page.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 19/08/2026 02:55
- fountainhillsaz.gov retrieved 19/08/2026 02:55
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 19/08/2026 02:55. Every claim traces to a source.
