Highlights
- The Fountain Hills air monitor recorded ozone at 82.0 PPB at 9 p.m. on August 3, crossing AirNow's Unhealthy for Sensitive Groups breakpoint.
- The reading was reported by the Maricopa County Air Quality Department from AQS site 040139704.
- Residents can check current conditions and active alerts on the AirNow Phoenix-area page.
The Maricopa County Air Quality Department's Fountain Hills monitoring station recorded ozone at 82.0 parts per billion at 9 p.m. Monday, August 3, crossing AirNow's threshold for the Unhealthy for Sensitive Groups category.
The reading came from AQS site 040139704, the county's fixed monitor serving the Fountain Hills area. The Unhealthy for Sensitive Groups designation applies when ozone concentrations reach levels that may affect people with respiratory conditions, the elderly, and children, according to the EPA AirNow framework.
The Maricopa County Air Quality Department administers the monitoring network and issues High Pollution Advisories when conditions warrant. Residents seeking guidance specific to health conditions should consult the county directly at 602-506-6010 or the Fountain Hills Air Quality page.
Current readings and any active advisories for the Phoenix area are available on AirNow. Updated hourly data will indicate whether conditions improve overnight.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 03/08/2026 22:59
- Maricopa County retrieved 03/08/2026 22:59
- fountainhillsaz.gov retrieved 03/08/2026 22:59
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 03/08/2026 22:59. Every claim traces to a source.
