---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part52/subpartNN"
level: "subpart"
label: "Subpart NN"
heading: "Pennsylvania"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part52-subpartNN"
sections_count: 33
---

# Subpart NN — Pennsylvania

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs › Part 52 — Approval and Promulgation of Implementation Plans

## Sections

- [§52.2020. Identification of plan.](/cfr/40/52.2020.md)
- [§52.2021. Classification of regions.](/cfr/40/52.2021.md)
- [§52.2022. Reserved](/cfr/40/52.2022.md)
- [§52.2023. Approval status.](/cfr/40/52.2023.md)
- [§52.2024-52.2026. Reserved](/cfr/40/52.2024-52.2026.md)
- [§52.2027. Approval status of Pennsylvania's Generic NO X and VOC RACT Rules.](/cfr/40/52.2027.md)
- [§52.2028-52.2032. Reserved](/cfr/40/52.2028-52.2032.md)
- [§52.2033. Control strategy: Sulfur oxides.](/cfr/40/52.2033.md)
- [§52.2034. Reserved](/cfr/40/52.2034.md)
- [§52.2035. Photochemical Assessment Monitoring Stations (PAMS) Program.](/cfr/40/52.2035.md)
- [§52.2036. Base year emissions inventory.](/cfr/40/52.2036.md)
- [§52.2037. Control strategy plans for attainment and rate-of-progress: Ozone.](/cfr/40/52.2037.md)
- [§52.2038. Rate of Progress Plans: Ozone.](/cfr/40/52.2038.md)
- [§52.2039. Interstate transport.](/cfr/40/52.2039.md)
- [§52.2040. Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of nitrogen oxides?](/cfr/40/52.2040.md)
- [§52.2041. Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of sulfur dioxide?](/cfr/40/52.2041.md)
- [§52.2042. Visibility protection.](/cfr/40/52.2042.md)
- [§52.2043. Control strategy for maintenance plans: ozone.](/cfr/40/52.2043.md)
- [§52.2044-52.2051. Reserved](/cfr/40/52.2044-52.2051.md)
- [§52.2052. Motor vehicle emissions budgets for Pennsylvania ozone areas.](/cfr/40/52.2052.md)
- [§52.2053. The Motor Vehicle Emissions Budgets for the Pennsylvania Counties in the Philadelphia-Wilmington, PA-NJ-DE 1997 Fine Particulate Matter Nonattainment Area](/cfr/40/52.2053.md)
- [§52.2054. Control of asphalt paving material.](/cfr/40/52.2054.md)
- [§52.2055. Control strategy: Lead.](/cfr/40/52.2055.md)
- [§52.2056. Determinations of attainment.](/cfr/40/52.2056.md)
- [§52.2057. Reserved](/cfr/40/52.2057.md)
- [§52.2058. Prevention of significant air quality deterioration.](/cfr/40/52.2058.md)
- [§52.2059. Control strategy: Particulate matter. \](/cfr/40/52.2059.md)
- [§52.2060. Small Business Assistance Program.](/cfr/40/52.2060.md)
- [§52.2061. Operating permits.](/cfr/40/52.2061.md)
- [§52.2062. Plan approvals.](/cfr/40/52.2062.md)
- [§52.2063. Original identification of plan section.](/cfr/40/52.2063.md)
- [§52.2064. EPA-approved Source-Specific Reasonably Available Control Technology (RACT) for Volatile Organic Compounds (VOC) and Oxides of Nitrogen (NO X ).](/cfr/40/52.2064.md)
- [§52.2065. Federal implementation plan addressing reasonably available control technology requirements for certain sources.](/cfr/40/52.2065.md)