View current rates in the District Code.
To calculate your bill, you will first need to determine how many units of water you will use. One unit is equal to 748 gallons. You will multiply the first four units using the Tier 1 rate, units from 4 to 11 using the Tier 2 rate, and all units over 11 using the Tier 3 rate. Then add all together with your monthly fixed charge, which is determined by your meter size. The typical residential meter is 5/8".