ARM 17.30.658. G-1 CLASSIFICATION STANDARDS

(1) Waters classified G-1 are to be maintained suitable for watering wildlife and livestock, aquatic life not including fish, secondary contact recreation, and marginally suitable for irrigation after treatment or with mitigation measures. No person may violate the following specific water quality standards for waters classified G-1: (a) the geometric mean number of Escherichia coli bacteria may not exceed 630 colony forming units per 100 milliliters and 10% of the samples may not exceed 1,260 colony forming units per 100 milliliters during any 30-day period; (b) EC shall not exceed 3000 µS/cm; (c) the surface and ground water standards listed in DEQ-7 do not apply.