# 40 C.F.R. § 52.326 (2026): Area-wide nitrogen oxides (NO X ) exemptions

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_326

## Section

- **Citation:** 40 C.F.R. § 52.326 (2026)
- **Heading:** Area-wide nitrogen oxides (NO X ) exemptions
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 40 CFR: Protection of Environment / Chapter I / Part 52 / Subpart G / § 52.326: § 52.326   Area-wide nitrogen oxides (NO X ) exemptions.

## Text

The Denver Regional Council of Governments (DRCOG) submitted a NO X exemption petition to the EPA on May 25, 1994 and submitted supporting documentation via a letter dated August 1, 1994. This petition requested that the Denver metropolitan area, a transitional ozone nonattainment area, be exempted from the requirement to meet the NO X provisions of the Federal transportation and general conformity rule with respect to ozone. The exemption request was based on monitoring data which demonstrated that the National Ambient Air Quality Standard for ozone had been attained in this area for the 3 years prior to the petition. The EPA approved this exemption request on July 28, 1995. [60 FR 40291, Aug. 8, 1995]

## Nearby sections

- [40 C.F.R. § 52.319 (2026) § 52.319   Conditional approval.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_319.md)
- [40 C.F.R. § 52.320 (2026) § 52.320   Identification of plan.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_320.md)
- [40 C.F.R. § 52.321 (2026) § 52.321   Classification of regions.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_321.md)
- [40 C.F.R. § 52.322 (2026) § 52.322   Extensions.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_322.md)
- [40 C.F.R. § 52.323 (2026) § 52.323   Approval status.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_323.md)
- [40 C.F.R. § 52.324 (2026) § 52.324   Legal authority.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_324.md)
- [40 C.F.R. § 52.326 (2026) § 52.326   Area-wide nitrogen oxides (NO X ) exemptions.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_326.md)
- [40 C.F.R. § 52.329 (2026) § 52.329   Rules and regulations.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_329.md)
- [40 C.F.R. § 52.330 (2026) § 52.330   Control strategy: Total suspended particulates.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_330.md)
- [40 C.F.R. § 52.331 (2026) § 52.331   Committal SIP for the Colorado Group II PM 10 . areas.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_331.md)
- [40 C.F.R. § 52.332 (2026) § 52.332   Control strategy: Particulate matter.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_332.md)
- [40 C.F.R. § 52.343 (2026) § 52.343   Significant deterioration of air quality.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_343.md)
- [40 C.F.R. § 52.344 (2026) § 52.344   Visibility protection.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_344.md)
- [40 C.F.R. § 52.345 (2026) § 52.345   Stack height regulations.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_345.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T40_P52_S52_326. Check the current official text before relying on it. Not legal advice.