Guinea-Bissau
Not safe to drink. Not safe from the tap. Water should be boiled, filtered, or bottled before you drink it.
Can you…
Source → Tap
Aging network · frequent contamination pointsCan you drink the tap water in Guinea-Bissau?
Last reviewed September 2026
Guinea-Bissau scores 23/100 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. So when people ask whether tap water is safe in Guinea-Bissau, the honest answer is “not safe to drink.” 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.
Ice, brushing your teeth & cooking: what’s safe in Guinea-Bissau?
- 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?
- Boil first — water that reaches a full boil is far safer than raw tap; don’t rinse salad or fruit in it.
Should you boil the tap water in Guinea-Bissau?
If you have to use the tap water in Guinea-Bissau, boil it first: a rolling boil for one minute makes it microbiologically safe to drink. Boiling does not remove chemicals, heavy metals, or lead, so filtered or bottled water is better where you can get it. More on what boiling does and doesn’t remove.
Do you need bottled water or a filter in Guinea-Bissau?
Bottled water is the safest choice for drinking in Guinea-Bissau, and it's widely sold — always check the seal is intact before you buy. A reusable bottle with a built-in purifier cuts both cost and plastic waste on longer stays.
A basic taste filter won't make the tap water in Guinea-Bissau safe. If you filter, use a purifier certified to remove bacteria and viruses; otherwise rely on bottled or boiled water.
Waterborne illness risk in Guinea-Bissau
Untreated water in Guinea-Bissau can carry the organisms behind travelers' diarrhea and, in some areas, more serious infections such as typhoid and hepatitis A. The CDC advises drinking only bottled, boiled, or properly filtered water, and checking your routine and travel vaccinations before you go. See CDC food & water precautions.
Worried about a specific tap? How to tell if your tap water is contaminated.
Water treatment & pipe infrastructure in Guinea-Bissau
Guinea-Bissau relies on basic / inconsistent treatment, 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.
Common questions about tap water in Guinea-Bissau
Can you drink tap water in Guinea-Bissau?+
Guinea-Bissau scores 23/100 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 Guinea-Bissau?+
Risky — use bottled or boiled water to brush, especially for children.
Is ice safe to use in drinks in Guinea-Bissau?+
Avoid ice — it’s frequently made from untreated water.
Is tap water in Guinea-Bissau safe for cooking?+
Boil first — water that reaches a full boil is far safer than raw tap; don’t rinse salad or fruit in it.
Data & sources
Official monitoring (WHO/UNICEF JMP, 2024) puts safely-managed drinking water access in Guinea-Bissau at 24%. Access to a safe source isn’t the same as tap-drinkability for visitors — our 23/100 score weights traveler drinkability, informed by this data.
- WHO/UNICEF JMP — 24% safely managed (2024)
- World Bank · safely managed drinking water (SH.H2O.SMDW.ZS)
- CDC · food & water safety for travelers
Read the full methodology — how the 0–100 score is built and what it does (and doesn’t) mean.
More countries in Africa
See the full Africa ranking — all 54 countries, safest to least safe.