Sewer Rates

Effective Feb. 01, 2023

Charges for sewer service are calculated based on one of the following methods (whichever quantity is greater):

Average Winter Consumption (AWC)**$3.63 x AWC
Equivalent Residential Unit (ERU)$14.52 x ERU

  • All new accounts are charged a flat, monthly rate of $21.78 per ERU (minimum ERU of 1) until a winter average is established for that account.
  • The minimum charge for any account is $14.52 per dwelling unit.

Sewer charges are updated annually and become fixed until the winter averages are re-evaluated at the end of March. The new rate will appear on your utility statement beginning in April.

**Please be advised that our billing system uses standard rounding methods when calculating winter averages, so your actual sewer charges may vary slightly. For more detailed information on your specific account(s), please contact the Utility Billing office at 303-438-6319 or


Water usage is analyzed from four monthly bills between November 1 and March 31 (typically involving Nov-Feb readings for Cycle 1, or Dec-Mar readings for Cycles 2-4). We calculate the average usage across those four months, which then becomes your AWC.


This value is based on a comparison to the demand of a single-family residence (approximately 116,800 gallons of sewage per year). The standard ERU is 1, and then varies according to the predicted usage once development is complete. The ERU is determined at the time that the sewer license is purchased, and that value permanently remains with the property address. (ERUs are only reassessed in the event that there would be an increase.) Multi-unit, residential buildings are usually assigned 1 ERU for each dwelling unit.


Once the sewer license has been purchased, minimum charges for sewer service are billed monthly until permanent service is established. These service charges are comparable to the current Equivalent Residential Unit rate described above (minimum ERU of 1). For questions on water license fees, please visit the building division.
(Broomfield Municipal Code: 13-08-080)