Seven countries still provide less than half of their population with access to basic drinking water, while another 40 countries have no basic sanitation services for at least 50% of citizens, new research shows.

It comes to light after a new study, entitled Forward-Thinking Countries, reveals the most and least progressive nations based on key social, environmental and economic indicators.

The proportion of the global population using safe drinking water services was reported to be 71% in 2017, with an additional 19% using basic services. This means that 785 million people still lacked access to even basic drinking water according to the latest available figures.

Out of the 146 assessed countries, just four provide 100% of the population with access to at least basic drinking water and basic sanitation: New Zealand, Israel, Qatar and Singapore.

The UN has called for universal and equal access to safe and affordable drinking services by 2030, to reduce the preventable health risks caused by contaminated or polluted water. These risks include infectious diseases like cholera, hepatitis A and typhoid fever.

Analysis reveals that the countries with the poorest water provisions experience a higher number of deaths from infectious diseases compared to countries with better provisions.

In countries where less than 70% of people have access to basic drinking water, an average of 486 deaths per 100,000 people were reported in 2018, compared to just 88.3 deaths per 100,000 people from countries with better drinking water services.

Of the 146 countries with water provision data available, the Central African Republic experienced the most deaths from infectious diseases in 2018, with 1,209.3 reported per 100,000 people. Just 54% of the population has access to at least basic drinking water, and 25% has access to basic sanitation facilities.

Countries with poor water provisions also experience a higher infant mortality rate. Countries where less than 70% of the population have access to basic drinking water reported 486 infant deaths per 1,000 live births, compared to just 88.3 deaths per 1,000 live births in other locations.