# denver-metro-north-front-range-co-serious · COLORADO · Arapahoe County · 8-Hour Ozone (2015) — Current EPA nonattainment county designations by pollutant

For denver-metro-north-front-range-co-serious · COLORADO · Arapahoe County · 8-Hour Ozone (2015), pollutant / naaqs is 8-Hour Ozone (2015); nonattainment area name is Denver Metro/North Front Range, CO - (Serious); county or area is Arapahoe County; state is COLORADO; data current as of is August 31, 2026, recorded from its source on 2026-08-31.

- **Row ID:** denver-metro-north-front-range-co-serious _(our reading, not quoted from the source)_
- **State:** COLORADO _(our reading, not quoted from the source)_
- **County or area:** Arapahoe County _(verified: appears in the quote below)_
- **Pollutant / NAAQS:** 8-Hour Ozone (2015) _(verified: appears in the quote below)_
- **Nonattainment area name:** Denver Metro/North Front Range, CO - (Serious) _(verified: appears in the quote below)_
- **Data current as of:** August 31, 2026 _(verified: appears in the quote below)_

## What the source says

> Arapahoe County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2015) | | Denver Metro/North Front Range, CO - (Serious)

## 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/).