The analytical requirements and method detection limits for water contaminants are as follows:

1. (1) for the organic chemicals listed in 40 C.F.R. 141.61, adopted by reference in 18 AAC 80.010(a), the analytical requirements and method detection limits are set out in 40 C.F.R. 141.24(e) and (f)(17), adopted by reference in 18 AAC 80.010(a);
2. (2) for the disinfection byproducts listed in 40 C.F.R. 141.64(a), adopted by reference in 18 AAC 80.010(a), the analytical requirements and method detection limits are set out in 40 C.F.R. 141.131, adopted by reference in 18 AAC 80.010(a);
3. (3) for the inorganic chemicals listed in 40 C.F.R. 141.62, adopted by reference in 18 AAC 80.010(a), the analytical requirements and method detection limits are set out in 40 C.F.R. 141.23(a)(4)(i) and (k), adopted by reference in 18 AAC 80.010(a);
4. (4) for the secondary contaminants listed in 40 C.F.R. 143.3, adopted by reference in 18 AAC 80.010(a), requirements for sampling and analysis are set out in 40 C.F.R. 143.4, adopted by reference in 18 AAC 80.010(a);

5. (5) analyses for microbial organisms must be conducted as follows:

   1. (A) for total coliform and Escherichia coli under 18 AAC 80.400 - 18 AAC 80.445, requirements set out in 40 C.F.R. 141.852, 40 C.F.R. 141.858(b), and if applicable, 40 C.F.R. 141.21(e)(2) and (f) as provided under 40 C.F.R. 141.21(h), all adopted by reference in 18 AAC 80.010(a);
   2. (B) for total coliform, fecal coliform, and heterotrophic plate count under 18 AAC 80.600 - 18 AAC 80.699, requirements are set out in 40 C.F.R. 141.74(a), adopted by reference in 18 AAC 80.010(a);
   3. (C) for Escherichia coli or other organisms under 40 C.F.R. 141.402(a) and (b), requirements are set out in 40 C.F.R. 141.402(c), adopted by reference in 18 AAC 80.010(a);
   4. (D) for Cryptosporidium and Escherichia coli under 18 AAC 80.701, requirements are set out in 40 C.F.R. 141.704 and 141.705, adopted by reference in 18 AAC 80.010(a);
6. (6) repealed 5/3/2019;
7. (7) analyses for lead and copper must be conducted using methods required by 40 C.F.R. 141.23(k), adopted by reference in 18 AAC 80.010(a); the practical quantitation limits for lead and copper are set out in 40 C.F.R. 141.89(a)(1)(ii) and (iii), adopted by reference in 18 AAC 80.010(a);
8. (8) analyses for pH, conductivity, calcium, alkalinity, orthophosphate, silica, and temperature must be conducted using methods required by 40 C.F.R. 141.23(k), adopted by reference in 18 AAC 80.010(a);
9. (9) the analytical requirements and method detection limits for the radiological contaminants listed in 18 AAC 80.335 are set out in 40 C.F.R. 141.25, adopted by reference in 18 AAC 80.010(a).

(Eff. 7/25/2010, Register 195; am 2/11/2017, Register 221; am 5/3/2019, Register 230)

Authority: AS 46.03.020, AS 46.03.050, AS 46.03.710, AS 46.03.720