# phoenix-mesa-az-moderate · ARIZONA · Maricopa County · 8-Hour Ozone (2008) — Current EPA nonattainment county designations by pollutant

For phoenix-mesa-az-moderate · ARIZONA · Maricopa County · 8-Hour Ozone (2008), pollutant / naaqs is 8-Hour Ozone (2008); nonattainment area name is Phoenix-Mesa, AZ - (Moderate); partial county is yes; county or area is Maricopa County; state is ARIZONA; data current as of is August 31, 2026, recorded from its source on 2026-08-31.

- **Row ID:** phoenix-mesa-az-moderate _(our reading, not quoted from the source)_
- **State:** ARIZONA _(our reading, not quoted from the source)_
- **County or area:** Maricopa County _(verified: appears in the quote below)_
- **Pollutant / NAAQS:** 8-Hour Ozone (2008) _(verified: appears in the quote below)_
- **Partial county:** yes _(our reading, not quoted from the source)_
- **Nonattainment area name:** Phoenix-Mesa, AZ - (Moderate) _(verified: appears in the quote below)_
- **Data current as of:** August 31, 2026 _(verified: appears in the quote below)_

## What the source says

> Maricopa County | PM-10 (1987) | * | Maricopa and Pinal Counties; Phoenix planning area, AZ - (Serious) | 8-Hour Ozone (2008) | * | Phoenix-Mesa, AZ - (Moderate)

## Source

- https://www3.epa.gov/airquality/greenbook/ancl.html

Last verified: 2026-08-31. Review by: 2027-02-27.
Part of [Current EPA nonattainment county designations by pollutant](https://referencesource.org/nonattainment-county-designations-by-pollutant/).