1. (1) The department adopts and incorporates by reference:

   1. (a) 40 CFR 141.6(j) and 141.6(k), which set forth effective dates associated with a revised maximum contaminant level for arsenic;
   2. (b) 40 CFR 141.11 and 141.62(b), which set forth maximum contaminant levels for inorganic contaminants;
   3. (c) 40 CFR 141.65, which sets forth maximum residual disinfectant levels; and
   4. (d) 40 CFR 141.80(c), which sets forth the action levels for lead and copper.

Authorizing statute(s): 75-6-104, MCA

Implementing statute(s): 75-6-104, MCA

History: NEW, 1977 MAR p. 1187, Eff. 12/24/77; AMD, 1982 MAR p. 594, Eff. 3/26/82; AMD, 1991 MAR p. 1492, Eff. 8/16/91; AMD, 1994 MAR p. 2131, Eff. 8/12/94; TRANS, from DHES, 1996 MAR p. 1499; AMD, 2000 MAR p. 3400, Eff. 12/8/00; AMD, 2003 MAR p. 1279, Eff. 6/27/03; AMD, 2004 MAR p. 3016, Eff. 1/1/05; AMD, 2008 MAR p. 2625, Eff. 12/25/08; AMD, 2010 MAR p. 1798, Eff. 8/13/10; AMD, 2024 MAR p. 253, Eff. 2/10/24.