Includes bibliographical references and index.

Introduction : acidic deposition and aquatic ecosystems : regional case studies / Donald F. Charles -- Processes influencing the acid-base chemistry of surface waters ; Hydrochemical assessment methods for analyzing the effects of acidic deposition on surface waters / Ronald K. Munson and Steven A. Gherini -- Historical trends in atmospheric sulfur deposition and methods for assessing long-term trends in surface water chemistry / Rudolf B. Husar, Timothy J. Sullivan, and Donald F. Charles -- Effects of acidification on biological communities in aquatic ecosystems / Joan P. Baker and Sigurd W. Christensen -- Geographic overview of the regional case study areas / Joseph M. Eilers and Anthony R. Selle -- Northeast overview / Charles T. Driscoll -- Adirondack Mountains / Charles T. Driscoll [and others]. Maine / Jeffrey S. Kahl [and others] -- Catskill Mountains / John L. Stoddard and Peter S. Murdoch -- Southeastern Canada : an overview of the effect of acidic deposition on aquatic resources / Dean S. Jeffries -- Southeast overview / Jerry W. Elwood -- Mountains of Western Virginia / B. Jack Cosby [and others] -- The Southern Blue Ridge Province / Jerry W. Elwood [and others] -- Florida overview / Curtis D. Pollman -- Florida / Curtis D. Pollman and Daniel E. Canfield, Jr. -- Upper Midwest overview / Robert B. Cook -- Upper Midwest / Robert B. Cook and Henriette I. Jager -- West overview / John M. Melack -- Rocky Mountains / John T. Turk and Norman E. Spahr -- Sierra Nevada, California / John M. Melack and John L. Stoddard -- Cascade Mountains / Peter O. Nelson. Interregional comparisons of surface water chemistry and biogeochemical processes / Lawrence A. Baker [and others] -- Long-term temporal trends in surface water chemistry / Timothy J. Sullivan -- Appendix A : Ion enrichment analysis for the Regional Case Studies Project ; Appendix B : Regional estimates of atmospheric dry deposition / Lawrence A. Baker -- Appendix C : Estimation of precipitation amount and chemistry at Eastern Lake Survey : phase I lakes / Rudolf B. Husar.