No materials may be discharged or caused to be discharged which affect the pH of the receiving waters by more than 0.5 pH unit. This does not apply to pH fluctuations of more than 0.5 pH unit contributable to natural influences.

Source: SL 1975, ch 16, § 1; transferred from § 34:04:02:25, effective July 1, 1979; 10 SDR 145, effective July 4, 1984; 13 SDR 129, 13 SDR 141, effective July 1, 1987; 19 SDR 111, effective January 31, 1993; transferred from § 74:03:02:25, July 1, 1996.

General Authority: SDCL 34A-2-11 , 34A-2-93.

Law Implemented: SDCL 34A-2-10 , 34A-2-11.