Highlights
- The West Phoenix air quality station recorded PM2.5 at 116.9 micrograms per cubic meter at noon Sunday, July 5.
- That reading crosses AirNow's 'Unhealthy for Sensitive Groups' breakpoint for fine particulate matter.
- PM10 at the same station reached 143.0 micrograms per cubic meter in the same hour.
- Maricopa County Air Quality Department is the reporting agency; current conditions are tracked at AirNow's Phoenix page.
The West Phoenix air monitoring station (AQS site ID 040130019) recorded PM2.5 at 116.9 micrograms per cubic meter at noon Sunday, July 5, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department. That reading crosses AirNow's threshold for the 'Unhealthy for Sensitive Groups' category for fine particulate matter.
The same station logged PM10 at 143.0 micrograms per cubic meter during the same hour. Other pollutants recorded at noon: carbon monoxide at 0.8 parts per million, nitrogen dioxide at 28.0 parts per billion, and ozone at 1.0 part per billion.
Readers can check current conditions and any active advisories for the Phoenix area at AirNow's Phoenix forecast page. Maricopa County also operates a Rapid Response Notification System for dust and high-pollution alerts at specific monitoring locations across the valley.
The next hourly update from the West Phoenix station is expected at 1 p.m.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040130019 retrieved 05/07/2026 13:44
- Maricopa County retrieved 05/07/2026 13:44
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 05/07/2026 13:44. Every claim traces to a source.
