This website [1] provides basic information on the reporting requirements of numerous environmental statutes, including the Clean Air Act, Clean Water Act, and EPCRA. Although designed to help small businesses, the information is valuable to any concerned citizen. The site is funded by the U.S. Environmental Protection Agency.
Environmental Reporting Requirements by Law and Checklist: http://www.smallbiz-enviroweb.org/Compliance/ReportingRequirements.aspx [1]
Links:
[1] http://www.smallbiz-enviroweb.org/Compliance/ReportingRequirements.aspx