supply chain management

How to Calculate Your Water Bill

Your water bill includes the following charges:      Minimum Bill  +  Volume Charge   =  Total Water Bill All customers pay the minimum bill, which includes up to 2 Ccf (1,496 gallons) of water. If you use more than 2 Ccf, you'll pay an additional volume charge. To determine your minimum bill and volume charge, you need to know three things:

How much water you used  This is listed on your bill in a unit called Ccf, which stands for hundred cubic feet. 1 Ccf equals 748 gallons. To convert Ccf to gallons, multiply by 748.         Example:   6 Ccf  x  748  =  4,488 gallons

Your water connection size This is also listed on your bill. Your connection size determines your minimum bill. This is because larger connection sizes place a greater demand on the water system. (Residential customers typically have a 3/4-inch connection size.)

Whether you live inside or outside the City of Charleston This affects your minimum bill and volume charge.

Here's how to calculate your water bill:

Determine your minimum bill Use the table below to find your minimum bill based on your water connection size and whether you live inside or outside the City of Charleston. Residential customers typically have a 3/4-inch connection. If you used between 0 and 2 Ccf of water, you will only pay the minimum bill amount. If you used more than 2 Ccf, continue to step 2.

Connection Size	Minimum Bill Inside City	Minimum Bill Outside City
3/4 inch	$12.25	$19.35
1 inch	$14.95	$22.45
1 1/2 inches	$26.90	$35.90
2 inches	$36.20	$46.40
3 inches	$76.00	$91.50
4 inches	$121.25	$142.50
6 inches	$236.00	$272.00
8 inches	$349.50	$400.50
10 inches	$463.50	$529.00
12 inches	$531.50	$606.00

Determine how much water you used above the 2 Ccf minimum For example, if you used a total of 6 Ccf, the first 2 are included in the minimum bill. That means you'll pay a volume charge for the other 4 Ccf.         6 Ccf (total usage)  -  2 Ccf (included in minimum bill)  =  4 Ccf   

Calculate the volume charge Find the appropriate unit rate based on whether you live inside or outside the City of Charleston and multiply by the amount of water you calculated in step 2. 

Water Use	Inside City Rate	Outside City Rate
Over 2 Ccf	$1.70 per Ccf	$3.24 per Ccf

Rates effective 1/1/2016 Continuing the example from above, if the customer lives inside City of Charleston, she would calculate her volume charge like this:            4 Ccf  x  $1.70  =  $6.80 (volume charge)

Add the volume charge to the minimum bill This is your total water bill. Here's what it would be for our residential customer inside who lives inside the City of Charleston and used 6 Ccf (4,488 gallons) of water:      $12.25 (minimum bill)  +  $6.80 (volume charge)  =  $19.05 (total water bill)