Haw. Code R. § 11-20-6 - Maximum microbiological contaminant levels
(a)
Beginning April 1, 2016, a system is in compliance with the MCL for E.
coli for samples taken under the provisions of section
11-20-9.1 unless any of the conditions identified in paragraphs (1) through 4) occur. For
purposes of the public notification requirements in section
11-20-18,
violation of the MCL may pose an acute risk to health.
(1) The system has an E.
coli-positive repeat sample following a total coliform-positive
routine sample.
(2) The system has
a total coliform-positive repeat sample following an E.
coli-positive routine sample.
(3)
The system fails to take all required repeat samples following an
E. coli-positive routine sample.
(4) The system fails to test for E.
coli when any repeat sample tests positive for total
coliform.
(b) Beginning
April 1, 2016, a public water system must determine compliance with the MCL for
E. coli in subsection (a) for each month in which it is
required to monitor for total coliforms.
(c)
The director hereby identifies the following as the best
technology, treatment techniques, or other means available for achieving
compliance with the MCL for E. coli in subsection (a):
(1) Protection of wells from contamination by
coliforms by appropriate placement and construction;
(2) Maintenance of a disinfectant residual
throughout the distribution system;
(3)
Proper maintenance of the distribution system including
appropriate pipe replacement and repair procedures, main flushing programs,
proper operation and maintenance of storage tanks and reservoirs, cross
connection control, and continual maintenance of positive water pressure in all
parts of the distribution system;
(4)
Filtration and disinfection of surface water, as described in
sections
11-20-46,
11-20-46.1,
and
11-20-46.2,
or disinfection of ground water, as described in section
11-20-50,
using strong oxidants such as chlorine, chlorine dioxide, or ozone;
and
(5) For systems using ground
water, compliance with the requirements of an EPA-approved State Wellhead
Protection Program developed and implemented under section 1428 of the
Act.
(d) The director,
pursuant to section 1412 of the Act, hereby identifies the technology,
treatment techniques, or other means available identified in subsection (c) as
affordable technology, treatment techniques, or other means available to
systems serving ten thousand or fewer people for achieving compliance with the
MCL for E. coli in subsection (a).
Notes
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