38 M.R.S. § 584-B
This is the official text of 38 M.R.S. § 584-B, part of Maine’s M.R.S — part of the compiled statutory law of Maine, published by the state as "M.R.S." Browse the sections below, each linked to its official government source.
Not legal advice. This page reproduces the official text of a government statute for reference only. Laws change, and how a statute applies depends on your specific facts. For advice about your situation, consult a licensed attorney in your state.
38 §584-B. Establishment of ambient increments -- Class I regions
Official statutory text
In addition to the ambient air quality standards set forth in section 584‑A , any Class I region or part thereof within the State, including those federal lands designated by the Federal Clean Air Act Amendments of 1977, is subject to a maximum allowable increase in concentration of sulfur dioxide, particulate matter and nitrogen oxides over the baseline concentration of that pollutant. An increase shall not be exceeded more than once annually for any period other than an annual period. The maximum allowable increase consists of: [PL 1989, c. 860, §1 (AMD).]
1. PM10. In regards to PM10: A. An increase in the annual arithmetic mean at any location not to exceed 4 micrograms per cubic meter; and [PL 1995, c. 493, §12 (AMD).] B. An increase in concentration for any 24-hour period at any location not to exceed 8 micrograms per cubic meter; and [PL 1995, c. 493, §12 (AMD).] [PL 1995, c. 493, §12 (AMD).]
2. Sulfur dioxide. In regards to sulfur dioxide: A. An increase in the annual arithmetic mean at any location not to exceed 2 micrograms per cubic meter; [PL 1979, c. 381, §7 (NEW).] B. An increase in concentration for any 24-hour period at any location not to exceed 5 micrograms per cubic meter; and [PL 1979, c. 381, §7 (NEW).] C. An increase in concentration for any 3-hour period at any location not to exceed 25 micrograms per cubic meter. [PL 1979, c. 381, §7 (NEW).] [PL 1979, c. 381, §7 (NEW).]
3. Nitrogen oxides. In regards to nitrogen oxides: A. An increase in the annual arithmetic mean at any location not to exceed 2.5 micrograms per cubic meter to be expressed as nitrogen dioxide. [PL 1989, c. 860, §2 (NEW).] [PL 1989, c. 860, §2 (NEW).]
1. PM10. In regards to PM10: A. An increase in the annual arithmetic mean at any location not to exceed 4 micrograms per cubic meter; and [PL 1995, c. 493, §12 (AMD).] B. An increase in concentration for any 24-hour period at any location not to exceed 8 micrograms per cubic meter; and [PL 1995, c. 493, §12 (AMD).] [PL 1995, c. 493, §12 (AMD).]
2. Sulfur dioxide. In regards to sulfur dioxide: A. An increase in the annual arithmetic mean at any location not to exceed 2 micrograms per cubic meter; [PL 1979, c. 381, §7 (NEW).] B. An increase in concentration for any 24-hour period at any location not to exceed 5 micrograms per cubic meter; and [PL 1979, c. 381, §7 (NEW).] C. An increase in concentration for any 3-hour period at any location not to exceed 25 micrograms per cubic meter. [PL 1979, c. 381, §7 (NEW).] [PL 1979, c. 381, §7 (NEW).]
3. Nitrogen oxides. In regards to nitrogen oxides: A. An increase in the annual arithmetic mean at any location not to exceed 2.5 micrograms per cubic meter to be expressed as nitrogen dioxide. [PL 1989, c. 860, §2 (NEW).] [PL 1989, c. 860, §2 (NEW).]
Status: in_force · Read it on the official government site
Need a lawyer in Maine?
Find a Maine lawyer
About this page: Statute text is reproduced from official government publishers via the
Open US Law dataset
(Vaquill AI, snapshot v2026.08, CC BY 4.0). Primary legislative text like this is public domain under the government-edicts doctrine
(Georgia v. Public.Resource.Org, 2020). We link every section back to its official source so you can verify it independently.