Hawaii Administrative Rules
Title 11 - DEPARTMENT OF HEALTH
Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS
Chapter 20 - RULES RELATING TO PUBLIC WATER SYSTEMS
Section 11-20-5 - Maximum contaminant levels for turbidity
Current through February, 2024
(a) The MCLs for turbidity apply to all public water systems using surface water sources in whole or in part.
(b) The requirements in this subsection apply to filtered surface water systems until June 29, 1993. The requirements in this subsection apply to unfiltered systems until June 29, 1993, or until filtration is installed, whichever is later. The director shall determine, in writing pursuant to 42 U.S.C. § 300g-1(b)(7)(C)(iii), which systems must install filtration. The MCLs measured at a representative entry point(s) to the distribution system, are:
(c) The MCL for filtered water turbidity levels, after June 29, 1993, shall be less than or equal to the applicable value in this subsection in ninety-five per cent of the measurements taken every month, and shall not exceed 5 nephelometric turbidity units or NTU at any time for the following filter units: