"The principal federal program to aid municipal wastewater treatment plant construction is authorized in the Clean Water Act (CWA). Established as a grant program in 1972, it now capitalizes state loan programs. Authorizations since 1972 have totaled $65 billion, while appropriations have totaled nearly $90 billion. It has represented 25%-30% of total funds appropriated to the Environmental Protection Agency (EPA) in recent years. In appropriations legislation, funding for EPA wastewater assistance is contained in the measure providing funds for the Department of the Interior, Environment, and Related Agencies, which includes EPA. Within the portion of that bill which funds EPA, wastewater treatment assistance is specified in an account now called State and Tribal Assistance Grants (STAG). Three trends in the funding of this account are most prominent: inclusion of non-infrastructure environmental grants to states, beginning in FY1993; increasing number and amount of special purpose grants since FY1989; and the addition of grant assistance for drinking water treatment projects in FY1997. This report summarizes, in chronological order, congressional activity to fund items in this account since 1987."
CRS Report for Congress, 96-647
National Agricultural Law Center: http:nationalaglawcenter.org/