It is estimated that each person uses around 100 gallons of water per day . The used water turns into sewage water, then flows down pipes and drains and into sewers that are located underneath roads. The sewage is then carried to waste treatment centers, where it is screened for bacteria, chemicals, floating objects, and other major water pollutants. Building these pipes and sewage water treatment plants for a water filtration system requires a lot of money and resources, especially energy resources, which many developing countries in Southeast Asia and Africa lack. As a result, large quantities of raw wastewater are released directly into rivers and oceans in these areas. According to the United Nations Sustainable Development Goal 6 Water Report in 2021, 44% of household wastewater is not safely treated globally, and over 80% of wastewater is released into the environment without adequate treatment.