I am over charged for water usage

Do you think that there is a leak on your side of the meter?  There is an easy check.  Turn off all of the water inside and outside of the house.  If the meter spins, then water is running past the meter and you have a leak. If it's not due to a leak and you think that this is a billing issue, then call the water company.  Ask them to calibrate the meter.  Ask them to review your bill.  Ask them to explain the bill to you.  Be persistent.  They are going to stonewall you along the way.  Be nice, but firm.  If that doesn't work, then write a demand letter.  If they don't respond, then sue in small claims court for the overcharges.  You can sue in small claims court for up to $10,000.