Regional Haze / BART

Contact: Robert Irvine, 517-284-6749
Agency: Environment, Great Lakes, and Energy

In July 1999, the U.S. Environmental Protection Agency (USEPA) published regulations to address visibility impairment in our nation's largest national parks and wilderness (Class I) areas. This rule was commonly known as the "Regional Haze Rule" (64 Federal Register 35714 - July, 1999) and is found in 40 CFR Part 51, Sections 51.300 through 51.309. On July 6, 2005, USEPA published a revised final rule, including Appendix Y to 40 CFR part 51, "Guidelines for BART Determinations Under the Regional Haze Rule." Under the USEPA Regional Haze Rule, certain emission sources "that may reasonably be anticipated to cause or contribute" to visibility impairment in downwind Class I areas are required to install Best Available Retrofit Technology (BART). The rule also requires affected states to demonstrate reasonable progress towards reaching natural background conditions by 2064. The first progress goal is 2018.

Within its boundary, Michigan has two Class I areas: Isle Royale National Park and Seney Wilderness Area. Michigan must submit to USEPA a Regional Haze State Implementation Plan (SIP) that identifies sources that cause or contribute to visibility impairment in these areas and require these sources to apply BART controls to reduce emissions. The SIP must also include a demonstration of reasonable progress toward reaching the first incremental progress goal (2018) for each of the state's Class I areas.


Documents and Resources


USEPA Links and Other Resources