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
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.
Nigeria has averaged higher in every one of the 3 decades both report.
Head to head by decade
| Decade | Nigeria | Tanzania | Difference | Ahead |
|---|---|---|---|---|
| 2000s | 57.27 million people | 21.49 million people | 35.79 million people | Nigeria |
| 2010s | 48.38 million people | 19.56 million people | 28.83 million people | Nigeria |
| 2020s | 36.18 million people | 16.65 million people | 19.53 million people | Nigeria |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher people not using improved drinking water sources, Nigeria or Tanzania?
- Nigeria, at 32.13 million people against 15.46 million people in Tanzania as of 2024.
- What is the difference in people not using improved drinking water sources between Nigeria and Tanzania?
- 16.67 million people, with Nigeria ahead.
- How many years of comparable data are there for Nigeria and Tanzania?
- 25 years are reported by both, from 2000 to 2024.
- How do Nigeria and Tanzania rank globally for people not using improved drinking water sources?
- Nigeria ranks 3rd and Tanzania ranks 6th of 231 countries.
- Where does this data come from?
- WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data, published as People not using improved drinking water sources. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
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.