Calculating Your Bill
From the reading, we then calculate in the thousands. For example, if the
water meter shows a reading of 3,859, the bill would be calculated from
3,000 gallons. The hundreds would carry over to the next month. Subtract
the previous reading from the new reading and you will know how many
thousands of gallons of water you have used. (ie. 5,000 (current month
read) - 2,000 (previous month read) = 3,000 gallons.