Is Tap Water Safe to Drink in Nigeria?

Lagos draws water primarily from the Adiyan and Iju Waterworks, both sourced from the Ogun River, though coverage reaches a minority of the city's over 20 million residents. Abuja relies on the Lower Usuma Dam, while the Niger Delta region's rivers, including the Niger and Benue, suffer significant pollution from decades of oil extraction, forcing many communities onto boreholes of variable quality.

Fecal coliform bacteria and inadequate sewage treatment contaminate much of Nigeria's surface and shallow groundwater, contributing to recurring cholera outbreaks in states like Bayelsa and Borno. In the Niger Delta, oil spills have introduced hydrocarbons and heavy metals into rivers and groundwater, creating additional long-term health concerns beyond typical bacterial risks.

Lagos and Abuja have the country's most developed treated networks, but even there, most residents supplement or replace tap water with sachet water or borehole-fed storage tanks. The Niger Delta states of Rivers and Bayelsa face the most severe water contamination nationally due to oil pollution, while northern states like Borno struggle with conflict-damaged infrastructure and drought-related scarcity.

Nigeria's tap water hardness varies widely by region, from soft water around 30–80 mg/L in the humid south to harder water exceeding 200 mg/L in parts of the drier north..

Most Nigerians drink sachet water, commonly called 'pure water,' sold in small sealed plastic bags from street vendors, alongside bottled water in urban areas, since municipal tap water is widely distrusted.

• •Drink only sealed bottled water or trusted sachet water brands
• •Avoid tap water entirely, even in mid-range hotels in Lagos or Abuja
• •Be cautious of water in the Niger Delta region due to oil contamination
• •Carry a portable filter for travel to conflict-affected northern states

• •Boil water for at least one minute before drinking or cooking if bottled water is unavailable
• •Avoid water and seafood from Niger Delta rivers due to oil pollution risk