State of Hawaii
08/10/2026 | News release | Distributed by Public on 08/11/2026 13:26
News Release – Trace Levels of Selenium Detected in Wailuku Water System
STATE OF HAWAIʻI
KA MOKU ʻĀINA O HAWAIʻI
JOSH GREEN, M.D.
GOVERNOR
KE KIA'ĀINA
DEPARTMENT OF HEALTH
KA ʻOIHANA OLAKINO
KENNETH S. FINK, MD, MGA, MPH
DIRECTOR
KA LUNA HO'OKELE
TRACE LEVELS OF SELENIUM DETECTED IN WAILUKU WATER SYSTEM
26-096
FOR IMMEDIATE RELEASE
August 10, 2026
HONOLULU - Trace levels of selenium have been detected for the first time in water samples collected at Waiheʻe Wells 1, 2 and 3 Chlorinator, as well as Kupaa Well 1 Chlorinator, which are part of the County of Maui Department of Water Supply's (MDWS) Wailuku water system (Public Water System HI0000212) serving the Māʻalaea, Kīhei, Wailea and Mākena areas of the island of Maui.
The detected selenium levels ranged from 2.4 to 6.5 micrograms per liter (ug/L), which are below the U.S. Environmental Protection Agency (EPA) and Hawaiʻi Department of Health (DOH) Maximum Contaminant Level for selenium of 50 ug/L. The detected levels are unlikely to pose a public health risk.
Selenium was detected in samples collected on May 27, 2026, and June 18, 2026. MDWS notified DOH of the initial detection via phone and email on Aug. 3, 2026. Per Hawaii Revised Statutes (HRS), Chapter 340E, Section 24, the DOH must notify the public within 14 days of being notified by the purveyor (MDWS). As a courtesy, the DOH allowed MDWS to issue its notification first.
Map of the service area of Wailuku Water System (Māʻalaea, Kīhei, Wailea and Mākena)
Selenium is a naturally occurring mineral element that is distributed widely in nature in most rocks and soils. The presence of selenium in drinking water can be attributed to the erosion of natural mineral deposits.
To date, MDWS is and continues to be in compliance with the federal and state selenium standard for drinking water. Impacted users can contact the MDWS at [email protected] and 808-270-7816.
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State of Hawaii published this content on August 10, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on August 11, 2026 at 19:26 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]