The City’s phased plan to reopen facilities and services is based on our commitment to protect City staff and residents, and in adherence with the most up-to-date State of Colorado and Boulder County public health orders. To learn more about which City facilities have reopened or plan to reopen, visit the COVID-19 webpage.

Wastewater Rates - Average Winter Consumption

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Current wastewater rates are:

  1. A fee based on your "average winter consumption" AWC) per 1,000 gallons of average winter consumption;
  2. Billing charge - This nominal charge recovers customer service costs to the City;
  3. Readiness to serve charge (per dwelling unit) -This charge recovers a portion of the cost of sewer facilities.

These changes in billing are the result of recommendations from the City's Utility Rate Task Force and their examination of the utility rate structure. The overall goals of the study were to ensure rates and fees are understandable, equitably distribute costs to system users, generate sufficient revenue to sustain utility operations, and facilitate effective planning and budgeting. The new rate structure will ensure long-term stability in the Utility Fund and pay for necessary upgrades to the wastewater system. The new rate structure was approved by the City Council on March 18, 2014.


Why use winter water use for the basis of sewer billing?
Sewer charges are for the treatment of water that drains into the sanitary sewer system and for taking care of the sewer system. Traditionally, the three lowest water consumption months for residential accounts are the winter months when customers are not watering their lawns and water usage is mainly inside the house. The majority of the water used during winter months is entering the sanitary sewer, thus it is an appropriate basis for base wastewater consumption.

How is my Average Winter Consumption determined?

Your AWC will be an average of your use for the months of December, January, and February.

Once I have my average, will it ever change?
Your new average will be recalculated automatically each year when we average your December through February use. It could change from year-to-year depending on how much water you use during the winter months.

If you have questions or comments about the new rate structure, please contact Kurt Kowar (303.335.4601).