Hawaii Administrative Rules › Title 11 - DEPARTMENT OF HEALTH › Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS › Chapter 20 - RULES RELATING TO PUBLIC WATER SYSTEMS › Section 11-20-46.2 - Enhanced treatment for Cryptosporidium

Current through June, 2024
(a) General
				Requirements
(1) The requirements of this
				section constitute national primary drinking water regulations. The regulations
				in this section establish or extend treatment technique requirements in lieu of
				maximum contaminant levels for Cryptosporidium. These requirements are in
				addition to requirements for filtration and disinfection in sections
				11-20-46
				and
				11-20-46.1.
(2)  Applicability. The
				requirements of this section apply to all subpart H systems, which are public
				water systems supplied by a surface water source and public water systems
				supplied by a ground water source under the direct influence of surface water.
(A) Wholesale systems, as defined in section
				11-20-2,
				must comply with the requirements of this section based on the population of
				the largest system in the combined distribution system.
(B)  The requirements of this section for
				filtered systems apply to systems required by National Primary Drinking Water
				Regulations to provide filtration treatment, whether or not the system is
				currently operating a filtration system.
(C) The requirements of this section for
				unfiltered systems apply only to unfiltered systems that timely met and
				continue to meet the filtration avoidance criteria in sections
				11-20-46
				and
				11-20-46.1,
				as applicable.
(3)
				Requirements. Systems subject to this section must comply with the following
				requirements:
(A)  Systems must conduct an
				initial and a second round of source water monitoring for each plant that
				treats a surface water or GWUDI source. This monitoring may include sampling
				for Cryptosporidium, E. coli, and turbidity as described in subsections (b)
				through (g), to determine what level, if any, of additional Cryptosporidium
				treatment they must provide.
(B)
				Systems that plan to make a significant change to their disinfection practice
				must develop disinfection profiles and calculate disinfection benchmarks, as
				described in subsections (i) through (j).
(C) Filtered systems must determine their
				Cryptosporidium treatment bin classification as described in subsection (k) and
				provide additional treatment for Cryptosporidium, if required, as described in
				subsection (l). All unfiltered systems must provide treatment for
				Cryptosporidium as described in subsection (m). Filtered and unfiltered systems
				must implement Cryptosporidium treatment according to the schedule in
				subsection (n).
(D) Systems with
				uncovered finished water storage facilities must comply with the requirements
				to cover the facility or treat the discharge from the facility as described in
				subsection (o).
(E) Systems
				required to provide additional treatment for Cryptosporidium must implement
				microbial toolbox options that are designed and operated as described in
				sections (p) through (u).
(F)
				Systems must comply with the applicable recordkeeping and reporting
				requirements described in subsection (v) through (w).
(G) Systems must address significant
				deficiencies identified in sanitary surveys performed by EPA as described in
				subsection (x).