Share of population not using improved drinking water sources in Tonga
Tonga: Share of population not using improved drinking water sources was 0.2% in 2024. ▼ Falling
Share of population not using improved drinking water sources in Tonga, 2000–2024
Source: WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data. Measured in %.
Analysis
The most recent figure for share of population not using improved drinking water sources in Tonga is 0.2%, measured in 2024. That is the lowest value across all 25 years on record.
That represents a change of down 72.5% over ten years.
Over the whole period, share of population not using improved drinking water sources in Tonga peaked at 1.0% in 2004 and was at its lowest, 0.2%, in 2024.
Tonga ranks 159th of 231 countries on this measure, in the middle of the range.
The long-run direction has been consistently falling across the 25 years of available data.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 1.0% | 0.8% | 1.0% | 10 |
| 2010s | 0.6% | 0.3% | 0.8% | 10 |
| 2020s | 0.2% | 0.2% | 0.3% | 5 |
Countries ranked near Tonga
- 156 Kazakhstan 0.2% compare
- 157 Montenegro 0.2% compare
- 158 Libya 0.2% compare
- 160 British Virgin Islands 0.1% compare
- 161 Reunion 0.1% compare
- 162 Belarus 0.1% compare
More environment data for Tonga
- Total greenhouse gas emissions excluding LULUCF 0.2929 Mt CO2e (2024)
- Total greenhouse gas emissions excluding LULUCF per capita 2.81 t CO2e/capita (2024)
- Methane (CH4) emissions from Agriculture 0.0593 Mt CO2e (2024)
- Methane (CH4) emissions from Building (Energy) 0.0003 Mt CO2e (2024)
- Methane (CH4) emissions from Fugitive Emissions (Energy) 0.0007 Mt CO2e (2024)
- Methane (CH4) emissions from Industrial Combustion (Energy) 0 Mt CO2e (2024)
- Methane (CH4) emissions (total) excluding LULUCF 0.0975 Mt CO2e (2024)
- Methane (CH4) emissions from Power Industry (Energy) 0 Mt CO2e (2024)
- Methane (CH4) emissions from Transport (Energy) 0.0002 Mt CO2e (2024)
- Methane (CH4) emissions from Waste 0.037 Mt CO2e (2024)
Frequently asked questions
- What is share of population not using improved drinking water sources in Tonga?
- Share of population not using improved drinking water sources in Tonga was 0.2% in 2024, according to WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data.
- What is the highest share of population not using improved drinking water sources recorded in Tonga?
- The highest recorded value was 1.0% in 2004.
- What is the lowest share of population not using improved drinking water sources recorded in Tonga?
- The lowest recorded value was 0.2% in 2024.
- How does Tonga rank for share of population not using improved drinking water sources?
- Tonga ranks 159th out of 231 countries with data for 2024.
- Is share of population not using improved drinking water sources rising or falling in Tonga?
- Over the last ten years it is down 72.5%. The long-run trend across the full record is falling.
- Where does this Tonga data come from?
- The figures come from WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data, published as part of Share of population not using improved drinking water sources. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 25 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Proportion 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.