A new study by the University of Sydney highlights the impact of water insecurity on sugary drink consumption and rising obesity rates in Pacific Island nations, focusing on Kiribati.

The research provides insight into how limited access to clean drinking water contributes to the growing public health crisis in the region.

One in two people in the Pacific Islands is classified as overweight (with a body mass index of 25-29) or obese (a BMI 30 or above).

Obesity is linked to serious health risks, including diabetes, heart disease, strokes and some cancers.

The study, led by Dr Suneha Seetahul from the University of Sydney and Dr Pierre Levasseur from Inrae, analysed survey data from more than 2,000 households across 21 islands in Kiribati.

Researchers tracked water supply sources and sugary drink consumption, identifying a significant relationship between water insecurity and increased sugary drink intake.

In Kiribati, 40 per cent of households rely on unprotected groundwater, and 28 per cent depend on rainwater for drinking.

Only one-third of the population has access to a safe, piped water system.

The study found households relying on unprotected groundwater and rainwater consumed 381 to 406 grams more sugary drinks per week than those with piped water.

For water-insecure households, this equates to more than 1.7 litres of sugary drinks weekly.

Kiribati faces unique challenges as a nation, as it is comprised of 33 low-lying islands spread across a vast area of the Pacific Ocean.

Water scarcity is a persistent issue, compounded by climate change.

Rising sea levels are salinising freshwater sources, and more frequent droughts are putting additional strain on already limited resources.

Globalisation and urbanisation have also altered traditional diets in the Pacific.

Previously, diets consisted mainly of fresh fish, root vegetables, and local fruits.

These have been partially replaced by processed foods and sugary drinks, which are calorie-dense but lack nutritional value.

Combined with water insecurity, these changes contribute to the obesity crisis.

The study's researchers propose several interventions to address these interconnected issues.

They say providing households with rainwater harvesting kits, filters, and treatment systems could improve access to safe drinking water.

Though costly, developing seawater desalination plants powered by clean energy is another option.

They say taxing sugary drinks could also reduce consumption.

For instance, a 10 per cent price increase on sugary drinks in Mexico reportedly led to an 11.6% decrease in consumption.

The findings have broader implications for other Pacific Island nations, including Tonga, Tuvalu, and Palau, where similar trends in water insecurity and sugary drink consumption are observed.

Remote Indigenous communities in Australia, which also face water access challenges, are similarly affected.

The study underscores the importance of addressing water insecurity and obesity together.

Improving access to clean drinking water could reduce reliance on sugary drinks and create sustainable solutions to public health challenges.

This dual approach is vital for building resilience against climate change and ensuring healthier futures for vulnerable communities.