The standards of performance for sewage treatment plants are those in 40 C.F.R. Part 60, Subpart O (July 1, 2024).

Source: 14 SDR 72, effective November 24, 1987; 17 SDR 170, effective May 13, 1991; transferred from § 74:26:15:06, 19 SDR 157, effective April 22, 1993; 21 SDR 119, effective January 5, 1995; 23 SDR 106, effective December 29, 1996; 30 SDR 26, effective September 1, 2003; 31 SDR 101, effective January 2, 2005; 32 SDR 209, effective June 13, 2006; 33 SDR 217, effective June 13, 2007; 36 SDR 207, effective June 28, 2010; 39 SDR 219, effective June 25, 2013; 42 SDR 52, effective October 13, 2015 ; 44 SDR 43, effective September 13, 2017; 46 SDR 64, effective November 25, 2019 ; 52 SDR 27, effective September 17, 2025 .

General Authority: SDCL 34A-1-6 , 34A-1-18 .

Law Implemented: SDCL 34A-1-18 .

Prior versions effective: 2019-11-25, 2017-09-13, 2015-10-13, 2013-06-25.