Hawaii Administrative Rules
Title 11 - DEPARTMENT OF HEALTH
Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS
Chapter 20 - RULES RELATING TO PUBLIC WATER SYSTEMS
Section 11-20-34 - Special monitoring for sodium
Current through February, 2024
(a) Suppliers of water for community public water systems shall collect and analyze one sample per plant at the entry point of the distribution system for the determination of sodium concentration levels; samples shall be collected and analyzed annually for public water systems utilizing solely surface water sources in whole or in part, and at least every three years for public water systems utilizing ground water sources The minimum number of samples required to be taken by the public water system shall be based on the number of treatment plants used by the public water system, except that multiple wells drawing raw water from a single aquifer may, with the director's approval, be considered one treatment plant for determining the minimum number of samples The supplier of water may be required by the director to collect and analyze water samples for sodium more frequently in locations where the sodium content is variable
(b) The supplier of water shall report to the director the results of the analyses for sodium within the first ten days of the month following the month in which the sample results were received or within the first ten days following the end of the required monitoring period as stipulated by the director, whichever of these is first. If more than annual sampling is required, the supplier shall report the average sodium concentration within ten days of the month following the month in which the analytical results of the last sample used for the annual average was received.
(c) The supplier of water shall notify appropriate local and state public health officials of the sodium levels by written notice by direct mail within three months. A copy of each notice required to be provided by this paragraph shall be sent to the director within ten days of its issuance.
(d) Analyses for sodium shall be performed by the methods specified in 40 C.F.R. § 141.23(k)(1).
