A person was using water supplied by Municipality. Due to shortage of water he started using underground water. He felt laxative effect. What could be the cause ?

A person was using water supplied by Municipality. Due to shortage of

1.	A person was using water supplied by Municipality. Due to shortage of water he started using underground water. He felt laxative effect. What could be the cause ?
Answer» Solution :The laxative effect is observed only when the sulphates present on water have concentration GREATER than `gt` 500 ppm. Otherwise at MODERATE LEVELS it is charmless.