Highlights
- The South Scottsdale air monitor recorded ozone at 71.0 PPB at 7 p.m. Monday, Aug. 17.
- The reading crossed AirNow's unhealthy-for-sensitive-groups breakpoint for ozone.
- PM10 particulate matter at the same station registered 22.0 micrograms per cubic meter at the same hour.
- Maricopa County Air Quality Department is the reporting agency; current conditions are tracked at AirNow's Phoenix-area page.
The air quality monitor at South Scottsdale (AQS site ID 040133003) recorded ozone at 71.0 parts per billion at 7 p.m. Monday, Aug. 17, crossing EPA AirNow's unhealthy-for-sensitive-groups breakpoint for ozone, according to the EPA AirNow public hourly aggregate reported by the Maricopa County Air Quality Department.
PM10 particulate matter at the same station registered 22.0 micrograms per cubic meter during the same hour.
Maricopa County's hot, sunny climate creates conditions that can increase the formation of ground-level ozone, a harmful air pollutant produced when emissions from vehicles and gasoline-powered equipment interact with sunlight, according to the county's air quality department.
Residents seeking health guidance or active advisories for the Phoenix area should monitor the AirNow Phoenix forecast page and can sign up for email or text alerts through Maricopa County Air Quality when a High Pollution Advisory is issued.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133003 retrieved 17/08/2026 20:55
- Maricopa County retrieved 17/08/2026 20:55
- Maricopa County retrieved 17/08/2026 20:55
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 17/08/2026 20:55. Every claim traces to a source.
