Sao Tome and Principe

/ 100

Unsafe

Not safe to drink. Not safe from the tap. Water should be boiled, filtered, or bottled before you drink it.

Can you…

Drinkable?

Brush teeth?

Ice?

Cooking?

Careful

Source → Tap

Aging network · frequent contamination points

Treatment

Limited treatment, aging network

Contamination risk

high

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Is tap water safe in Sao Tome and Principe?

Sao Tome and Principe scores 35/100 on our water-safety index — not safe to drink. Not safe from the tap. Water should be boiled, filtered, or bottled before you drink it. Scores above 70 mean tap water is generally safe to drink. 40–69 means treat it with caution — filtering or bottled water is wise. Below 40 means it’s best avoided straight from the tap.

Drinking, brushing, ice & cooking

Drinkable?: No — don’t drink it unfiltered. Boil, filter, or buy bottled.
Brush teeth?: Risky — use bottled or boiled water to brush, especially for children.
Ice?: Avoid ice — it’s frequently made from untreated water.
Cooking?: Generally okay, since a rolling boil kills most pathogens; rinse raw produce with filtered water when you can.

Water treatment & pipe infrastructure

Sao Tome and Principe relies on limited treatment, aging network, delivered through a aging network — frequent contamination points. That puts the practical contamination risk between source and tap at high. Even where water leaves the plant clean, aging mains and rooftop storage are where quality most often slips.

Frequently asked questions

Can you drink tap water in Sao Tome and Principe?+

Sao Tome and Principe scores 35/100 on our water-safety index — not safe to drink. No — don’t drink it unfiltered. Boil, filter, or buy bottled.

Is it safe to brush your teeth with tap water in Sao Tome and Principe?+

Risky — use bottled or boiled water to brush, especially for children.

Is ice safe to use in drinks in Sao Tome and Principe?+

Avoid ice — it’s frequently made from untreated water.

Is tap water in Sao Tome and Principe safe for cooking?+

Generally okay, since a rolling boil kills most pathogens; rinse raw produce with filtered water when you can.

Data & sources

36.7%safely-managed access

Official monitoring (WHO/UNICEF JMP, 2024) puts safely-managed drinking water access in Sao Tome and Principe at 36.7%. Access to a safe source isn’t the same as tap-drinkability for visitors — our 35/100 score weights traveler drinkability, informed by this data.

Read the full methodology — how the 0–100 score is built and what it does (and doesn’t) mean.