Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Acid rain reduced in eastern United States

Conference ·
OSTI ID:617895
 [1]; ;  [2]
  1. Illinois State Water Survey, Champaign, IL (United States)
  2. Pennsylvania State Univ., University Park, PA (United States)
Sulfate and free hydrogen ion concentrations in precipitation decreased 10 to 25 percent over large areas of the eastern United States in 1995. The largest decreases in both ions occurred in and downwind of the Ohio River Valley, the same area where Phase I of the 1990 Clean Air Act Amendments set limitations, effective January 1, 1995, on sulfur dioxide emissions from affected coal-fired sources. Based on our analysis of precipitation chemistry and emissions data, we conclude that substantial declines in acid rain occurred in the eastern United States in 1995 because of large reductions in sulfur dioxide emissions in the same region.
OSTI ID:
617895
Report Number(s):
CONF-970145--
Country of Publication:
United States
Language:
English