Residential Sewer Averaging

Once a year, the amount of water that a house uses is averaged to establish a set rate for the account’s monthly sewer charge. By using sewer averaging, the residents can influence the sewer charges and the utility bill is more predictable. The averaging process considers the months of November, December, January, and February. By conserving water during this period, you can control your monthly sewer volume charge.

Why is the volume of water consumed at the address used to calculate the sewer volume rate?

The inflow of water to the property is directly related to the outflow of sewer and wastewater. By averaging the inflowing water consumption, a real expected outflow can be closely identified.   

Why does sewer averaging use the winter months? 

Historically, the four lowest water consumption months for residential customers are during the winter months.  Water use is lower during this time because most people are not engaging in outdoor watering.  Most of winter water use is directly entering the sanitary sewer for wastewater processing.

The process of sewer averaging: 

The water used during the consecutive months of November, December, January, and February is measured. The single winter month with the highest water usage is removed from the calculation. The water amount for each of the remaining three months is added together and then divided by 3. The outcome of this calculation reflects an address’ average winter water consumption. Each resident’s sewer volume charge is based on their specific house’s average consumption determined during Sewer Averaging. Each spring the utility bill is updated to reflect a new sewer volume charge (SVC) that is effective until the next sewer averaging.

Do all customers have their sewer averaged?  

Only established residential customers are eligible for sewer averaging. New residents who move into an address during the winter months will not be eligible until the next round of averaging because the process requires four full months of water use data. Commercial customers are excluded from the leveling of sewer charges.

How can I reduce my bill?   

You have control over the sewer average since you have control over how much water is used during the winter. Since residential sewer charges are based on each individual resident’s winter water consumption, you can lower your sewer charge by being highly water conscious during the winter months. Quickly take care of running toilets and dripping faucets. Keeping water usage as low as possible during the winter months will pay off for the next twelve months. 

Please contact Utility Billing at 972-564-7304 with questions regarding sewer averaging, the sewer volume charge (SVC), or the sewer service fee (SSF).