Highlights
- The Fountain Hills air monitoring station recorded ozone at 88.0 PPB at 11 p.m. Tuesday, June 10.
- 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 track 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 88.0 parts per billion at 11 p.m. Tuesday, June 10, crossing AirNow's threshold for Unhealthy for Sensitive Groups, according to the EPA AirNow public hourly aggregate.
The reading was logged at AQS site ID 040139704, the agency's Fountain Hills station. Sensitive groups, including people with respiratory or heart conditions, children, and older adults, face elevated risk at ozone levels in this range, according to Maricopa County Air Quality Department guidance.
Residents can monitor current readings and any active advisories for the Phoenix area at AirNow's Phoenix page. For Maricopa County-specific guidance, the department publishes advisories at maricopa.gov/1244/Air-Quality.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040139704 retrieved 11/06/2026 00:18
- Maricopa County retrieved 11/06/2026 00:18
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 11/06/2026 00:18. Every claim traces to a source.
