Share of the population using improved water sources in Tonga
Tonga: Share of the population using improved water sources was 99.8% in 2024. ▬ Flat
Share of the population using improved 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 the population using improved water sources in Tonga is 99.8%, measured in 2024. That is the highest value across all 25 years on record.
Compared with earlier readings it is up 0.4% over ten years.
Over the whole period, share of the population using improved water sources in Tonga peaked at 99.8% in 2024 and was at its lowest, 99.0%, in 2004.
Tonga ranks 73rd of 231 countries on this measure, in the middle of the range.
Share of the population using improved water sources in Tonga, year by year
| Year | % | Change |
|---|---|---|
| 2000 | 99.0% | — |
| 2001 | 99.0% | -0.0% |
| 2002 | 99.0% | -0.0% |
| 2003 | 99.0% | -0.0% |
| 2004 | 99.0% | -0.0% |
| 2005 | 99.0% | +0.0% |
| 2006 | 99.1% | +0.0% |
| 2007 | 99.1% | +0.0% |
| 2008 | 99.1% | +0.0% |
| 2009 | 99.2% | +0.0% |
| 2010 | 99.2% | +0.0% |
| 2011 | 99.3% | +0.0% |
| 2012 | 99.3% | +0.0% |
| 2013 | 99.4% | +0.0% |
| 2014 | 99.4% | +0.0% |
| 2015 | 99.5% | +0.0% |
| 2016 | 99.5% | +0.0% |
| 2017 | 99.6% | +0.0% |
| 2018 | 99.6% | +0.0% |
| 2019 | 99.7% | +0.0% |
| 2020 | 99.7% | +0.0% |
| 2021 | 99.7% | +0.0% |
| 2022 | 99.8% | +0.0% |
| 2023 | 99.8% | +0.0% |
| 2024 | 99.8% | +0.0% |
Tonga compared with similar countries
- Tonga's 99.8% is above the median for upper middle income countries, which is 98.8%, 1.0× the median. (58 countries reporting)
- Tonga's 99.8% is above the median for East Asia & Pacific, which is 98.8%, 1.0× the median. (37 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 99.0% | 99.0% | 99.2% | 10 |
| 2010s | 99.4% | 99.2% | 99.7% | 10 |
| 2020s | 99.8% | 99.7% | 99.8% | 5 |
Countries ranked near Tonga
- 70 Belarus 99.9% compare
- 71 Reunion 99.9% compare
- 72 British Virgin Islands 99.9% compare
- 74 Libya 99.8% compare
- 75 Montenegro 99.8% compare
- 76 Kazakhstan 99.8% compare
More environment data for Tonga
- Standard Deviation, annual growth rate 0 % change on previous year (2025)
- Standard Deviation 0.234 °C (2025)
- Temperature change 0.858 °C (2025)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), annual 3.06 % change on previous year (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per unit 0 Mt CO2e per US$ of GDP (2024)
- Total greenhouse gas emissions excluding LULUCF (Mt CO2e), per capita 0 Mt CO2e per person (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), annual growth rate 0.1689 % change on previous year (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), per unit of GDP 0 Mt CO2e per US$ of GDP (2024)
- Methane (CH4) emissions from Agriculture (Mt CO2e), per capita 0 Mt CO2e per person (2024)
- Methane (CH4) emissions from Building (Energy) (Mt CO2e), annual 0 % change on previous year (2024)
Frequently asked questions
- What is share of the population using improved water sources in Tonga?
- Share of the population using improved water sources in Tonga was 99.8% 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 the population using improved water sources recorded in Tonga?
- The highest recorded value was 99.8% in 2024.
- What is the lowest share of the population using improved water sources recorded in Tonga?
- The lowest recorded value was 99.0% in 2004.
- How does Tonga rank for share of the population using improved water sources?
- Tonga ranks 73rd out of 231 countries with data for 2024.
- Is share of the population using improved water sources rising or falling in Tonga?
- Over the last ten years it is up 0.4%. The long-run trend across the full record is flat.
- 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 the population using improved 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 who use an improved drinking water source, regardless of collection time. An improved drinking water source is a safely designed drinking water source and includes e.g. piped water, boreholes or tubewells and packaged or delivered water.