Can You Drink Tap Water in Tanzania? (2026) Safety Guide

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Key Statistics

Water Infrastructure & Supply

Tanzania's water infrastructure has evolved significantly since independence in 1961, though it remains underdeveloped compared to international standards. The Dar es Salaam Water and Sewerage Corporation (DAWASCO) serves the largest city, while regional water utilities (known as Urban Water Supply and Sanitation Authorities, or UWSSAs) operate in secondary cities. The National Rural Water Supply and Sanitation Programme (NRWSSP) has been the main vehicle for expanding rural access since 2006.

Urban water treatment plants in Dar es Salaam draw primarily from the Ruvu River, with the Upper Ruvu and Lower Ruvu plants having a combined capacity of approximately 504 million liters per day. However, actual output frequently falls short due to aging infrastructure, power outages, and high non-revenue water losses estimated at 40-50%. Many areas receive intermittent supply, and water pressure drops allow contaminants to enter the distribution network through cracked and corroded pipes.

Major improvement projects are underway, including the World Bank-funded Dar es Salaam Metropolitan Development Project and the Kigamboni New City water supply scheme. The government's Water Sector Development Programme Phase II (WSDP-II) aims to achieve 85% rural and 95% urban water coverage. Also, the Lake Victoria Water Supply Project is expanding treated water access to towns in the Lake Zone. Despite these efforts, significant investment gaps remain, particularly in wastewater treatment and rural distribution networks.

Contamination & Health Risks

The primary health risks from tap water in Tanzania include bacterial contamination from E. coli, Salmonella, and Vibrio cholerae, as well as parasitic infections from Giardia lamblia and Cryptosporidium. Cholera outbreaks occur periodically, particularly during rainy seasons when flooding overwhelms drainage systems and contaminates water sources. The CDC classifies Tanzania as a destination where travelers should avoid tap water entirely.

Naturally occurring fluoride is a notable concern in certain regions, particularly in the Rift Valley areas around Arusha, Manyara, and Singida. Fluoride levels in some groundwater sources exceed 8 mg/L , well above the WHO guideline of 1.5 mg/L , leading to endemic dental and skeletal fluorosis among local populations. Agricultural runoff containing pesticides and fertilizers also affects surface water quality, especially near large-scale farming areas in the Kilimanjaro and Morogoro regions.

For travelers, the most immediate risks are gastrointestinal illnesses including traveler's diarrhea, which affects an estimated 40-60% of visitors to East Africa. Even in upscale hotels in cities like Dar es Salaam and Zanzibar, tap water should not be consumed directly. Swallowing water while showering poses minimal risk, but brushing teeth should be done with bottled or treated water. Ice in drinks is unsafe unless you can confirm it was made with purified water, which is common only in international hotels and high-end restaurants.

Regional Water Quality Breakdown

Practical Tips for Travelers

• Always carry a reliable filter bottle (such as LifeStraw Go or Grayl GeoPress) when traveling in Tanzania , it's essential for safari trips, hiking, and areas where bottled water may not be readily available.
• In Swahili, ask for bottled water by saying 'Maji ya chupa, tafadhali' (Bottled water, please) or 'Maji safi' (clean water) to ensure you receive sealed, purified water.
• Check that bottled water seals are intact before purchasing , refilled bottles with broken seals are occasionally sold, especially from street vendors.
• Avoid ice in drinks unless you're at an international hotel or high-end restaurant that confirms they use purified water for ice-making.
• Brush your teeth with bottled or filtered water only. Keep a bottle next to your sink as a reminder, and keep your mouth closed while showering.
• Peel all fruits and vegetables yourself, or wash them thoroughly with purified water before eating. Avoid pre-cut fruit from street vendors.
• Pack oral rehydration salts (ORS) and anti-diarrheal medication as a precaution. Traveler's diarrhea is common, and prompt treatment prevents dehydration.
• When on safari, ask your lodge or camp about their water purification system , many reputable operators provide filtered or UV-treated water for refilling bottles, which reduces plastic waste.

Bottled Water Availability & Cost

Bottled water is widely available throughout Tanzania, including in remote areas and national parks. Popular local brands include Kilimanjaro, Uhai, and Afya, while international brands like Dasani (Coca-Cola) are also common. A 500ml bottle typically costs 500-1,000 Tanzanian Shillings (approximately $0.20-$0.40 USD), while a 1.5L bottle ranges from 1,000-2,000 TSh ($0.40-$0.80 USD). In tourist areas, lodges, and national parks, prices can be 2-3 times higher, with a 500ml bottle reaching 2,000-3,000 TSh.

Buying water in bulk (5L or 20L containers) from supermarkets in cities is significantly more economical if you're staying in one location. A 5-liter jerrycan of purified water costs around 3,000-5,000 TSh ($1.20-$2.00 USD). Many safari lodges and eco-lodges now provide refill stations with filtered water to reduce plastic waste , bringing a reusable filter bottle like a LifeStraw or Grayl is both cost-effective and environmentally responsible. Tanzania has a growing plastic waste problem, so minimizing single-use bottle consumption is encouraged.

Frequently Asked Questions