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Is Maui Tap Water Safe to Drink?

Yes! Generally Safe to Drink*

LAST UPDATED: 2:28 am, October 27, 2021

Table of Contents

Can You Drink Tap Water in Maui?

Yes, tap water is drinkable.

Tap Safe includes data from many publicly available sources, including the WHO (World Health Organization), CDC (Center for Disease Control), and user submitted databases, but unfortunately there's not enough data about Maui.

To see user submitted ratings of the water quality for Hawaii, see the "User Submitted Ratings" box on this page.

Why are there contaminants in my drinking water? 

Drinking water, including bottled water, may reasonably contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline at 800-426-4791 or 

The sources of drinking water (both tap and bottled water) include rivers, lakes, streams, ponds, reservoirs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals. In some cases, radioactive material can pick up substances resulting from animals or from human activity. 

How can consumers maintain water quality? 

Backflow Protection 

A simple but essential component in plumbing that safeguards the drinking water supply. Higher water pressures elsewhere can cause a reversal in the normal flow of water. This may allow contaminated water to enter the water distribution system. Backflow prevention devices enable the water to flow in only one direction. The air gap between a faucet and water in the sink is the most common form of backflow prevention. Never leave a running hose in a bucket of water. The bucket contents could be “sucked back” into your home plumbing and potentially contaminate the water. Businesses in Maui County that are required to have backflow prevention devices should check them annually to ensure that they are working correctly. 

Is Maui Tap Water Safe to Drink? Tap water & safety quality

The estimated price of bottled water

$4.88 in USD (1.5-liter)


Maui tap water
  • Drinking Water Pollution and Inaccessibility 1% Very Low
  • Water Pollution 1% Very Low
  • Drinking Water Quality and Accessibility 99% Very High
  • Water Quality 99% Very High

The above data is comprised of subjective, user submitted opinions about the water quality and pollution in Maui, measured on a scale from 0% (lowest) to 100% (highest).

Related FAQS



EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the Hawaii Department of Health, as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the U.S. EPA (January 2019 - March 2019), tap water provided by this water utility was in compliance with federal health-based drinking water standards.

Utility details

  • Serves: 68976
  • Data available: 2012-2017
  • Data Source: Surface water
  • Total: 20

Contaminants That Exceed Guidelines

  • Bromodichloromethane
  • Bromoform
  • Chromium (hexavalent).Dibromoacetic acid
  • Dibromochloromethane
  • Haloacetic acids (HAA5)†
  • Nitrate
  • Nitrate and nitrite
  • Total trihalomethanes (TTHMs)†

Other Detected Contaminants

  • 1.4-Dioxane
  • Barium
  • Bromochloroacetic acid
  • Chlorate
  • Chloroform
  • Chromium (total)
  • Di(2-ethylhexyl) phthalate
  • Fluoride
  • Selenium
  • Strontium
  • Vanadium


Always take extra precautions, the water may be safe to drink when it leaves the sewage treatment plant but it may pick up pollutants during its way to your tap. We advise that you ask locals or hotel staff about the water quality. Also, note that different cities have different water mineral contents.

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