ARSD 74:51:01:32. Effluent limits for discharges to coldwater fishery waters

Effluents discharged from water pollution control facilities into waters classified for the beneficial use of coldwater permanent fish life propagation and coldwater marginal fish life propagation must be of high quality. In order to protect these uses, the effluent may not exceed 10 mg/L of suspended solids and 10 mg/L of 5-day biochemical oxygen demand as a 30-day average. Neither pollution characteristic may exceed 17.5 mg/L in any one sample collected during the sampling period. Facilities that apply for a permit to discharge to the reach of the Missouri River from the Big Bend Dam to the North Dakota border are exempt from this section.