# 40 C.F.R. § 81.15 (2026): Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware)

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_15

## Section

- **Citation:** 40 C.F.R. § 81.15 (2026)
- **Heading:** Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware)
- **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 81 / Subpart B / § 81.15: § 81.15   Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware).

## Text

The Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware) consists of the territorial area encompassed by the boundaries of the following jurisdictions (including the territorial area of all municipalities (as defined in section 302(f) of the Clean Air Act, 42 U.S.C. 1857h(f)) geographically located within the outermost boundaries of the area so delimited): In the State of Pennsylvania: Bucks County, Chester County, Delaware County, Montgomery County, Philadelphia County. In the State of New Jersey: Burlington County, Camden County, Gloucester County, Mercer County, Salem County. In the State of Delaware: New Castle County.

## Nearby sections

- [40 C.F.R. § 81.11 (2026) § 81.11   Scope.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_11.md)
- [40 C.F.R. § 81.12 (2026) § 81.12   National Capital Interstate Air Quality Control Region (District of Columbia, Maryland, and Virginia).](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_12.md)
- [40 C.F.R. § 81.13 (2026) § 81.13   New Jersey-New York-Connecticut Interstate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_13.md)
- [40 C.F.R. § 81.14 (2026) § 81.14   Metropolitan Chicago Interstate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_14.md)
- [40 C.F.R. § 81.15 (2026) § 81.15   Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware).](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_15.md)
- [40 C.F.R. § 81.16 (2026) § 81.16   Metropolitan Denver Intrastate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_16.md)
- [40 C.F.R. § 81.17 (2026) § 81.17   Metropolitan Los Angeles Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_17.md)
- [40 C.F.R. § 81.18 (2026) § 81.18   Metropolitan St. Louis Interstate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_18.md)
- [40 C.F.R. § 81.19 (2026) § 81.19   Metropolitan Boston Intrastate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_19.md)
- [40 C.F.R. § 81.20 (2026) § 81.20   Metropolitan Cincinnati Interstate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_20.md)
- [40 C.F.R. § 81.21 (2026) § 81.21   San Francisco Bay Area Intrastate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_21.md)
- [40 C.F.R. § 81.22 (2026) § 81.22   Greater Metropolitan Cleveland Intrastate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_22.md)
- [40 C.F.R. § 81.23 (2026) § 81.23   Southwest Pennsylvania Intrastate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_23.md)
- [40 C.F.R. § 81.24 (2026) § 81.24   Niagara Frontier Intrastate Air Quality Control Region.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_24.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T40_P81_S81_15. Check the current official text before relying on it. Not legal advice.