Lessons from Phase 2 compliance with the U.S. Acid Rain Program

Working Paper
Lessons from Phase 2 compliance with the U.S. Acid Rain Program
Ellerman, A.D. (2003)
MIT Center for Energy and Environmental Policy Research Working Paper, MIT-CEEPR WP 03-009

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Abstract/Summary:

The acid rain provisions of the 1990 Clean Air Act Amendments, included in Title IV, required fossil-fuel-fired electricity generating units to reduce sulfur dioxide (SO2) emissions by 50% in two phases. In the first, known as Phase I and extending from 1995 through 1999, generating units of 100 MWe of capacity and larger, having an SO2 emission rate in 1985 of 2.5 lbs. per million Btu (#/mmBtu) or higher, were required to take a first step and to reduce SO2 emissions to an average of 2.5 #/mmBtu during these transitional years. Phase II, which began in 2000 and continues indefinitely, expanded the scope of the program by including all fossil-fuel-fired generating units greater than 25 MWe and increased its stringency by requiring affected units to reduce emissions to an average emission rate that would be approximately 1.2 #/mmBtu at average annual heat or Btu input in 1985-87, and that would be proportionately lower for increased total fossil-fuel fired heat input.

Citation:

Ellerman, A.D. (2003): Lessons from Phase 2 compliance with the U.S. Acid Rain Program. MIT Center for Energy and Environmental Policy Research Working Paper, MIT-CEEPR WP 03-009 (http://ceepr.mit.edu/publications/working-papers/173)
  • Working Paper
Lessons from Phase 2 compliance with the U.S. Acid Rain Program

Ellerman, A.D.

MIT Center for Energy and Environmental Policy Research Working Paper
MIT-CEEPR WP 03-009

Abstract/Summary: 

The acid rain provisions of the 1990 Clean Air Act Amendments, included in Title IV, required fossil-fuel-fired electricity generating units to reduce sulfur dioxide (SO2) emissions by 50% in two phases. In the first, known as Phase I and extending from 1995 through 1999, generating units of 100 MWe of capacity and larger, having an SO2 emission rate in 1985 of 2.5 lbs. per million Btu (#/mmBtu) or higher, were required to take a first step and to reduce SO2 emissions to an average of 2.5 #/mmBtu during these transitional years. Phase II, which began in 2000 and continues indefinitely, expanded the scope of the program by including all fossil-fuel-fired generating units greater than 25 MWe and increased its stringency by requiring affected units to reduce emissions to an average emission rate that would be approximately 1.2 #/mmBtu at average annual heat or Btu input in 1985-87, and that would be proportionately lower for increased total fossil-fuel fired heat input.

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