18 AAC 80.300 - Maximum contaminant levels (MCLs)
(a)
General
requirement.Subject to a variance issued under
18
AAC 80.370, a variance issued under
18
AAC 80.371, or an exemption granted under
18
AAC 80.375, the owner or operator of a public water
system may not cause or allow the use of water from that system for human
consumption if the water contains, or has a significant potential for containing
(1) a contaminant in a concentration that
exceeds a primary maximum contaminant level (MCL) set under (b) of this section;
or
(2) a contaminant other than one
described in (1) of this subsection, if the department determines that the
concentration of that contaminant is high enough to make the water a hazard to
human health.
(b)
Primary MCL s: The primary MCLs for a public water system are as
follows:
(1) for inorganic chemical
contaminants, the MCLs set out in
40 C.F.R.
141.62(b), adopted by
reference in
18
AAC 80.010(a);
(2) for organic chemical contaminants that are
(A) synthetic organic chemicals, the MCLs set
out in 40 C.F.R.
141.61(c), adopted by
reference in
18
AAC 80.010(a);
(B) volatile organic chemicals, the MCLs set
out in 40 C.F.R.
141.61(a), adopted by
reference in
18
AAC 80.010(a);
(C) disinfection byproducts, the MCLs set out
in 40 C.F.R.
141.64(a), adopted by
reference in
18
AAC 80.010(a);
(3) for turbidity, for a community water
system , non-transient non-community water system , or transient non-community
water system that uses a surface water source or a GWUDISW source and that
(A) meets the criteria for avoiding filtration
under 40 C.F.R.
141.71, adopted by reference in
18
AAC 80.010(a), and under
18
AAC 80.620, the MCL as set out in
40 C.F.R.
141.71(a)(2);
(B) does not meet the criteria for avoiding
filtration , the MCL as set out in
40 C.F.R.
141.73, adopted by reference in
18
AAC 80.010(a);
(4) for Escherichia coli
bacteria, the MCL as set out in
40 C.F.R.
141.63(c) and (d), adopted by
reference in
18
AAC 80.010(a);
(5) for radionuclides, the MCL as set out in
40 C.F.R.
141.66, adopted by reference in
18
AAC 80.010(a).
(c)
Secondary MCL s. The secondary
MCLs for a public water system are set out in
40 C.F.R.
143.3, adopted by reference in
18
AAC 80.010(a). The department will
require a public water system to meet the secondary MCLs if the department
determines that public health is threatened or that exceeding a secondary MCL is
not in the public interest.
(d)
Repealed 4/24/2009.
Notes
Authority:AS 46.03.020
AS 46.03.050
AS 46.03.070
AS 46.03.710
AS 46.03.720
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.