GroundRules
40 CFR 52.1021: Classification of regions.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER C—AIR PROGRAMS
- PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
- Subpart U—Maine
The Maine plan was evaluated on the basis of the following classifications:
Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone
Metropolitan Portland Intrastate I II III III III
Androscoggin Valley Interstate IA IA III III III
Down East Intrastate IA IA III III III
Aroostook Intrastate III III III III III
Northwest Maine Intrastate III III III III III
Collected 2026-08-27T02:26:04Z. Source file · JSON