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Tap Water Safety in Guam

Yes! Generally Safe to Drink*

LAST UPDATED: April 8, 2021 12:53 pm

Table of Contents

How do People In Guam Rate The Tap Water?

Travellers and residents of Guam have rated the water quality and pollution as follows, according to subjective survey data. A score of 100% is considered very high, and a score of 0% is very low. Please be cautious that "moderate to very high" water pollution is bad and the higher the rate of water quality the better.

Can you drink the tap water in Guam?

The US Center for Disease Control's travel advisory recommends avoiding tap water and drinking bottled or disinfected water in Guam (source). Like all countries though, water accessibility, sanitation, and treatment vary widely from location to location, so we encourage looking for specific city information.

What do people in Guam think about the tap water?

Guam Tap water is generally considered safe to drink.

Guam’s water authority (which is regulated by the EPA) states: “Guam’s drinking water is most definitely safe to drink! Guam’s water system is tested continuously to ensure the safety of your drinking water. The routine microbiological test we perform on the distribution system looks for the presence of indicator organisms called coliform bacteria.
Strict federal regulations from the Safe Drinking Water Act presses the agency to abide by these laws.”

For more up to date info on Guam’s drinking water status, please check out their most recent EPA mandated water quality report, containing information on it’s test results.


tap water
  • Drinking Water Pollution and Inaccessibility 47% Moderate
  • Water Pollution 47% Moderate
  • Drinking Water Quality and Accessibility 53% Moderate
  • Water Quality 53% Moderate

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


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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