Excess power bill and low water output

3 phase 20hp motor running at 1000ft and the voltage shows as 360-380v at 11am and the motor runs for 24 hrs everyday. The water output has reduced significantly and the mcb is 63A 415V. Not able to figure out the problem why the water bill is coming up to 1,65000 to 1,80000. Varies monthly, but in none of the months it has fluctuated more than 10,000 but in the past month it has fluctuated of over 30,000. Please help.