Try to use more foam giving shampoo like alclear. And wash your hair thoroughly.because of the hard water shampoo wont get washed finely from your hair and this causes dandruff problem and finally leads to hair fall. So be careful
Make sure that the shampoo you use is not a detergent.
Shampoos are of two types- one is detergent shampoos used for cleaning glass or cleaning automobiles,etc and the other is surfactant shampoos used for washing hair.
Before you buy any shampoo, please check on the label as 'surfactant' then proceed to buy as it is ideal for hair wash