Nigeria vs Tanzania: People not using improved drinking water sources

Nigeria
32.13 million people
in 2024
Tanzania
15.46 million people
in 2024
Nigeria rank
3rd
Tanzania rank
6th

People not using improved drinking water sources over time

  • Nigeria
  • Tanzania
20.0M30.0M40.0M50.0M60.0M200020122024

How they compare

Nigeria currently reports 32.13 million people against 15.46 million people in Tanzania, a difference of 16.67 million people.

That makes Nigeria's figure about 2.1 times Tanzania's.

Across all 25 years both countries report, Nigeria has been ahead every year.

Nigeria ranks 3rd and Tanzania ranks 6th of 231 countries.

Individual pages

About this data

Indicator
People not using improved drinking water sources
Unit
people
Source
WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data
Licence
CC BY 4.0 (Our World in Data)
Coverage
231 places, 5,586 data points, 2000–2024
Last refreshed

Number of people not using improved drinking water sources. These people might use surface water sources or unprotected springs or wells, as no safe and reliable improved drinking water source is available to them.