Questions

Removing the contaminents if any in the water which causes harm to our health is involved in the purifying of water. 

This process involves chemicals. Chloramines, Hydrogen peroxide, Iodine are the chemicals which are used in purifying water.

At that time, the king would directly consult to a priest whenever He want to make the decision for the people. This mean that the role of the priest at that time is similar to the role of ministers on modern day's government. This make the priests have equal standing with other nobles.

Hence, Village priests led a lifestyle similar to that of the nobility according to clergy is true.