Most of our villagers are exposed to filthy and unhygienic drinking water leading to many kinds of diseases.
At least 1.2 billion people are without clean water globally, and 1.8 million children die each year from diarrhea
There is a very cheap solution to purify water called SODIS (Solar water disinfection).
The method is so simple. Plastic water bottles if kept in the sun light for 8 hours (on a cloudy day the bottle should be kept for 20 to 22 hours) kills most of the disease causing bacteria. During this period, UV radiation of the sun kills the diarrhea-causing pathogens in the water. Water treated by the SODIS method therefore helps to prevent diarrhea and saves lives.
Today, at least 5 million people in about 30 countries disinfect their drinking water daily with SODIS, and 750,000 more will start using this method. SODIS works by exposing contaminated water to the sun’s UV rays, destroying the genetic material and cellular structure of viruses, bacteria, and protozoa. PET plastic bottles work best, as they’re both durable and allow much of the UV radiation to pass through them.
More details can be found by clicking this link