Obtaining clean water after an emergency

In the midst of rapid global climate change, Pakistan has been hit by the most devastating flood the country has ever faced in more than a decade. Tens of millions of people were affected when the monsoon rains continued since last June 2022, resulting in floods that submerged a third of Pakistan. The disaster has claimed more than 1,100 lives, destroyed many crops and damaged or destroyed more than a million homes. This also resulted in a critical supply of clean water to the remaining survivors and surrounding areas. Although having received some support from various countries, the victims of the flood still need tons of help.
The Challenge: Provide ideas that could utilise cost-efficient and eco-friendly technology in providing clean water to the victims in Pakistan.