What is the difference in people using improved drinking water sources between Saint Lucia and Tonga?

48.26 people, with Tonga ahead.

How many years of comparable data are there for Saint Lucia and Tonga?

25 years are reported by both, from 2000 to 2024.

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 using improved drinking water sources. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Saint Lucia vs Tonga: People using improved drinking water sources

Saint Lucia

116.49 people

in 2024

Tonga

164.75 people

in 2024

Saint Lucia rank

166th

Tonga rank

164th

People using improved drinking water sources over time

Saint Lucia
Tonga

How they compare

Tonga currently reports 164.75 people against 116.49 people in Saint Lucia, a difference of 48.26 people.

That makes Tonga's figure about 1.4 times Saint Lucia's.

The two have swapped places 1 time across 25 shared years of data; in 2000 it was Saint Lucia ahead.

Saint Lucia ranks 166th and Tonga ranks 164th of 231 countries.

Saint Lucia has averaged higher in every one of the 3 decades both report.

Head to head by decade

Decade	Saint Lucia	Tonga	Difference	Ahead
2000s	10,827 people	1,015 people	9,812 people	Saint Lucia
2010s	5,156 people	587.91 people	4,568 people	Saint Lucia
2020s	475.27 people	224.53 people	250.74 people	Saint Lucia

Averages of every year both report within each decade.

Frequently asked questions

Which has higher people using improved drinking water sources, Saint Lucia or Tonga?: Tonga, at 164.75 people against 116.49 people in Saint Lucia as of 2024.
What is the difference in people using improved drinking water sources between Saint Lucia and Tonga?: 48.26 people, with Tonga ahead.
How many years of comparable data are there for Saint Lucia and Tonga?: 25 years are reported by both, from 2000 to 2024.
How do Saint Lucia and Tonga rank globally for people using improved drinking water sources?: Saint Lucia ranks 166th and Tonga ranks 164th 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 using improved drinking water sources. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Saint Lucia vs Tonga: People using improved drinking water sources. Statizoid, drawing on WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data. Retrieved 07 September 2026, from https://environment.statizoid.com/compare/number-of-people-in-the-world-with-and-without-access-to-improved-water-sources/st-lucia/tonga/

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<a href="https://environment.statizoid.com/compare/number-of-people-in-the-world-with-and-without-access-to-improved-water-sources/st-lucia/tonga/">Saint Lucia vs Tonga: People using improved drinking water sources</a> — Statizoid

About this data

Indicator: People 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: 28 August 2026

Number of people using only unimproved drinking water sources.