Hawaii Administrative Rules › Title 11 - DEPARTMENT OF HEALTH › Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS › Chapter 20 - RULES RELATING TO PUBLIC WATER SYSTEMS › Section 11-20-50 - Ground Water Rule

Current through June, 2024
(a) General requirements and applicability.
(1) Scope of this section. The requirements
				of this section constitute National Primary Drinking Water
				Regulations.
(2) Applicability.
				This section applies to all public water systems that use ground water except
				that it does not apply to public water systems that combine all of their ground
				water with surface water or with ground water under the direct influence of
				surface water prior to treatment under section
				11-20-46.
				For the purposes of this section, "ground water system" is defined as any
				public water system meeting this applicability statement, including consecutive
				systems receiving finished ground water.
(3)
				 General requirements. Systems subject to this section must comply
				with the following requirements:
(A) Sanitary
				survey information requirements for all ground water systems as described in
				subsection (b).
(B) Microbial
				source water monitoring requirements for ground water systems that do not treat
				all of their ground water to at least 99.99 percent (4-log) treatment of
				viruses (using inactivation, removal, or a state-approved combination of 4-log
				virus inactivation and removal) before or at the first customer as described in
				subsection (c).
(C) Treatment
				technique requirements, described in subsection (d), that apply to ground water
				systems that have fecally contaminated source waters, as determined by source
				water monitoring conducted under subsection (c), or that have significant
				deficiencies that are identified by the State or that are identified by EPA
				under SDWA section 1445. A ground water system with fecally contaminated source
				water or with significant deficiencies subject to the treatment technique
				requirements of this section must implement one or more of the following
				corrective action options: correct all significant deficiencies; provide an
				alternative source of water; eliminate the source of contamination; or provide
				treatment that reliably achieves at least 4-log treatment of viruses (using
				inactivation, removal, or a state-approved combination of 4-log virus
				inactivation and removal) before or at the first customer.
(D) Ground water systems that provide at
				least 4-log treatment of viruses (using inactivation, removal, or a
				State-approved combination of 4-log virus inactivation and removal) before or
				at the first customer are required to conduct compliance monitoring to
				demonstrate treatment effectiveness, as described in subsection
				(d)(2).
(E) If requested by the
				State, ground water systems must provide the State with any existing
				information that will enable the State to perform a hydrogeologic sensitivity
				assessment. For the purposes of this section, "hydrogeologic sensitivity
				assessment" is a determination of whether ground water systems obtain water
				from hydrogeologically sensitive settings.
(4) Compliance date. Ground water systems
				must comply, unless otherwise noted, with the requirements of this section
				beginning December 1, 2009.