Is Honolulu Tap Water Safe To Drink?
Yes! The tap water is safe to drink.
Yes, tap water in Honolulu is generally safe to drink. The Honolulu Board of Water Supply treats and routinely tests the city’s groundwater to meet federal and Hawaii drinking water standards.
Water quality can be affected by lead or other materials in older building plumbing, especially in homes built before 1986. Let the cold tap run briefly after water has been sitting for several hours, and use a certified filter if plumbing concerns exist.
Last checked: 2026-08-31
United States is ranked as number 15 globally with a score of 96.2% in the water quality EPI research conducted by Yale University.
Source of Water in Honolulu, United States
Honolulu’s tap water comes mainly from groundwater stored in underground aquifers beneath Oahu. Rainfall filters through the island’s volcanic rock and replenishes these natural water supplies.
The Honolulu Board of Water Supply pumps the water from wells and underground shafts, then disinfects it before distribution. The water is delivered through the city’s water system to homes and businesses.
Honolulu Drinking Fountains
Public drinking fountains in Honolulu are generally safe to use when they are connected to the municipal drinking-water system and properly maintained. The water supply is treated and regulated to meet federal and Hawaii drinking-water standards.
Avoid fountains that are visibly dirty, damaged, stagnant, or marked out of service. Let the water run briefly before drinking, especially if the fountain has not been used recently, and follow any posted boil-water advisory.
Drinking Water Map
Here is a map showing all the locations of drinking water spots in Honolulu. You can click on each water drop to open the spot directly in Google Maps for directions. For easy access on the go, download our iOS app to find water fountains nearby.
About the Author
Hi, I'm Emily Hartman, a researcher and water quality specialist with a background in public health.
I've spent the last few years studying how everyday water systems impact our health, and I'm passionate about making that information clear and useful for everyone.
Safe, clean tap water isn't just my job, it's something I truly care about.