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17.30.656    E-5 CLASSIFICATION STANDARDS

(1) Waters classified E-5 are to be maintained suitable for agricultural purposes, secondary contact recreation, saline tolerant aquatic life, and wildlife.

(2) No person may violate the following specific water quality standards for waters classified E-5:

(a) the designated uses of a receiving water body under a different classification must be fully maintained;

(b) 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.

(3) Changes in the water quality must support existing and designated uses.

History: 75-5-301, MCA; IMP, 75-5-301, MCA; NEW, 2002 MAR p. 2196, Eff. 8/16/02; AMD, 2004 MAR p. 725, Eff. 4/9/04; AMD, 2006 MAR p. 528, Eff. 2/24/06.

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