Certified water treatment and water distribution operators and third-party technical assistance providers are approved to use DPD colorimetric test kits, in addition to the methods specified in C.F.R. § 141.131(c)(1) (July 1, 2018), to measure residual disinfectant concentrations for chlorine, chloramines, and chlorine dioxide.

Source: 31 SDR 21, effective August 24, 2004; 36 SDR 111, effective January 11, 2010 ; 45 SDR 159, effective July 1, 2019 .

General Authority: SDCL 34A-3A-3.

Law Implemented: SDCL 34A-3A-3(2).

Prior versions effective: 2010-01-11.