In some developing countries, there are many kinds of problems which have to be faced by the society. One of the crucial problems which are usually emerging is about water problem. In some areas, the water which is available is sometimes not clean. What does it mean by clean in here? Clean water is water which is not containing any dangerous or at least not good substances on it.

 

However, people need to consume water. Therefore it is needed a system to clean the water. One of the examples of systems which are usually used, especially in developing countries, are SODIS. It is solar water disinfection. This is a good way to clean the water because it is quite effective. Besides, it is also efficient, in other word is it is cheap to be done. This kind of system is usually used by the house hold. Not many equipment which is needed to have by the household which want to clean the water with this water. The people only need to have a special bottle which is usually called as PET bottle. 
    
However, this solar water disinfection is the best to help the society in order to be able to consume the pure or clean water.