Rule 17.30.620 - SPECIFIC SURFACE WATER QUALITY STANDARDS-GENERAL(1) Specific surface water quality standards, along with general provisions in ARM 17.30.635 through 17.30.637, 17.30.640, 17.30.641, 17.30.645, and 17.30.646, protect the beneficial water uses set forth in the water-use descriptions for the following classifications of water.(2) Standards for Escherichia coli bacteria are based on a minimum of five samples obtained during separate 24-hour periods during any consecutive 30-day period analyzed by the most probable number or equivalent membrane filter methods.Mont. Admin. r. 17.30.620
Eff. 12/31/72; AMD, Eff. 11/4/73; AMD, Eff. 9/5/74; AMD, 1980 MAR p. 2252, Eff. 8/1/80; TRANS, from DHES, 1996 MAR p. 1499; AMD, 2006 MAR p. 528, Eff. 2/24/06.75-5-201, 75-5-301, MCA; IMP, 75-5-301, MCA;