ARSD 74:51:01:07
ARSD 74:51:01:07. Acids and alkalis
Cite as S.D. Admin. R. 74:51:01:07
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.