Our paper focuses on the environmental disclosures made by 51 United States (US) manufacturing firms for 1992 and 1993. Content analysis of annual report disclosures, made within the president's letter, the management's discussion and analysis (MD&A), and note sections, was used in conjunction with environmental ratings of US corporations, as compiled by the Council on Economic Priorities (CEP). Our study investigated whether disclosures differed between firms who had been rated good, mixed or poor in their environmental activities and whether these disclosure differences could be used to differentiate between actual environmental performance levels. Our study also investigated how a change in disclosure standard for one section of the annual report changes disclosures in other sections of the annual report. The results are important in light of Dunlap and Scarce's (1991, p. 657) findings that public concern about the environment was at an all-time high, and Epstein and Freedman's (1994, p. 106) finding that individual investors consider annual report information about environmental activities to be more desirable than information about any other social activity.