ARM 17.30.654. E-3 CLASSIFICATION STANDARDS

(1) Waters classified E-3 are to be maintained suitable for agricultural purposes, secondary contact recreation, and wildlife. (2) No person may violate the following specific water quality standards for waters classified E-3: (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) the designated uses of a receiving water body under a different classification must be fully maintained. (3) The narrative standards in ARM 17.30.637(1) (d) and (2) that pertain to aquatic life do not apply.