New York (Web Desk): Billions of people die each year because they are forced to drink water contaminated with waste matter, the World Health Organization said Thursday, adding that improvements are needed in ensuring access to clean water and sanitation worldwide.

The WHO urged that large investments required to help providing universal access to safe drinking water .

Maria Neira, who head’s WHO’s public health department, said in a statement, “Today, almost two billion people use a source of drinking-water contaminated with faeces, putting them at risk of contracting cholera, dysentery, typhoid and polio.”

She further stated, “Contaminated drinking-water is estimated to cause more than 500,000 diarrhoeal deaths each year and is a major factor in several neglected tropical diseases, including intestinal worms, schistosomiasis and trachoma.”

In 2015, the UN General Assembly adopted Sustainable Development Goals (SDGs) — a series of aspirational targets for eradicating poverty and boosting human wellbeing, including vowing to ensure universal access to safe and affordable water and sanitation by 2030.

According to a fresh report published by WHO on behalf of UN-Water on Thursday, countries will fall far short of this goal if they do not radically increase their investments.

The report welcomed the fact that countries had on average raised their annual budgets for water , sanitation and hygiene by 4.9 percent over the past three years.

But 80 percent of countries acknowledge that their financing is still not enough to meet their nationally-set targets for increasing access to safe water and sanitation, it found.

WHO warned in a statement, “In many developing countries, current national coverage targets are based on achieving access to basic infrastructure, which may not always provide continuously safe and reliable services.”

The World Bank has meanwhile estimated that investments in infrastructure will need to triple to $114 billion per year — not including operating and maintenance costs — in order to meet the SDG targets.

Guy Ryder, Chair of UN-Water and head of the International Labour Organization said, “This is a challenge we have the ability to solve.”

“Increased investments in water and sanitation can yield substantial benefits for human health and development, generate employment and make sure that we leave no one behind,” he added.