Environmental effects of alternatives to abate wastewater pollution in the Lower Missouri River Basin's three watersheds: Creve Coeur, Fee Fee, and Lower Bonhomme, in St. Louis County were evaluated. Three basic alternatives were considered: (1) No Action; (2) Subregional; (3) The applicant-proposed Regional. Both the regional and subregional alternatives would result in long-term water quality improvement, and would have minor impact on the growth pattern of this approximately 80%-developed study area. Alternatives were considered: (1) No Action; (2) Subregional; (3) The applicant-proposed Regional. Both the regional and subregional alternatives would result in long-term water quality improvement, and would have minor impact on the growth pattern of this approximately 80%-developed study area.