As of 2020, an estimated 2 billion people globally lacked access to safely managed drinking water services.

Sub-Saharan Africa has the highest proportion of people without access to improved sanitation facilities, with an estimated 23% of the population lacking access in 2020.

Diarrhea is the leading cause of death from unsafe water, sanitation, and hygiene, accounting for an estimated 437,000 deaths annually.

While lack of infrastructure, financial resources, and education and awareness are all key challenges to improving access to safe water and sanitation, lack of political will is not a direct challenge.

Fecal sludge management is the term for the practice of collecting, treating, and disposing of human excreta in a safe and sustainable manner.

Radiological contamination is not a type of water contamination, as it is not typically found in water sources.

The Sustainable Development Goals (SDGs), adopted in 2015, include a goal to ensure access to safe water and sanitation for all by 2030.

Filtration is not a recommended method for treating water at the household level, as it does not remove harmful bacteria and viruses.

Purification is the process of removing harmful substances from water, making it safe to drink.

Incinerator toilets are not a type of sanitation facility, as they are not commonly used for human waste disposal.

Handwashing is the practice of washing hands with soap and water to remove dirt, germs, and chemicals.

Reduced environmental pollution is not a direct benefit of improved access to safe water and sanitation.

Wastewater management is the process of collecting, treating, and disposing of wastewater in a safe and sustainable manner.

Influenza is not a waterborne disease, as it is spread through respiratory droplets.

Water conservation is the practice of using water efficiently and reducing water waste.