Highlights
- The Fountain Hills air quality station recorded ozone at 83.0 parts per billion at 1 a.m. on July 4, 2026.
- That reading crosses AirNow's 'Unhealthy for Sensitive Groups' breakpoint for ozone, per Maricopa County Air Quality Department data.
- Residents in sensitive groups should check the AirNow Phoenix-area page for current forecasts and any active advisories.
The Maricopa County Air Quality Department's monitoring station in Fountain Hills recorded ozone at 83.0 parts per billion at 1 a.m. on July 4, 2026, crossing AirNow's threshold for the Unhealthy for Sensitive Groups category.
The reading was reported through the EPA AirNow public hourly aggregate at AQS site ID 040139704. Maricopa County Air Quality is the reporting agency for the station.
Residents who fall into sensitive groups should consult the AirNow Phoenix-area forecast page for current conditions and any active alerts. For guidance specific to Maricopa County, the county's air quality page provides advisories and sign-up options for High Pollution Advisory notifications. The Town of Fountain Hills also maintains air quality and dust control resources for residents.
Check AirNow's Phoenix-area page for updated hourly readings as the holiday morning progresses.
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 02:27
- Maricopa County retrieved 04/07/2026 02:27
- fountainhillsaz.gov retrieved 04/07/2026 02:27
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 02:27. Every claim traces to a source.
