Sewer Connection Fees

Frequently Asked Questions

  • Why are there differences in fees?

    The waste discharged from a single family home is different than waste discharged from a small office building, just as the waste from a small office building is different than a restaurant. A general rule of thumb is that the greater the volume of flow, and the greater the amount of food waste in that flow discharge, the greater the fees.

    For example, data collected from sampling of wastewater shows that restaurants have a greater impact on our treatment plants than most any other type of business. Restaurants serve food on plates and cook with pots and pans. Imagine cooking 50 dinners for your family each night and how much more dish washing you would have to do, how many more sinks you would have to have, and how many more times people would use the restroom.

    Restaurants are broken down into different categories based on types of food service and equipment installed. Categories include full service restaurants (use lots of pots, pans, and plates) to fast food, pizza parlors, and low impact places like sandwich shops. The fees vary per category. Full service restaurants are typically the most costly.

  • When are my fees due?

    All sewer fees are due prior to the completion of the physical connection or at the time building plans are picked up either from Boise City or Ada County Building Departments.

  • Why pay sewer connection fees?

    Sewer connection fees are a one-time charge to pay for the cost of the pipeline and treatment facilities to transport and treat your waste. This wastewater infrastructure consists of 782 miles of pipe, two large treatment plants, and a 4225 acre biosolids application site.

  • What are sewer connection fees?

    The fees are made up of three elements:

    1. Treatment fees pay for facilities at the wastewater treatment plants
    2. Trunk fees pay for the pipelines that transport your wastewater
    3. Service line and equivalent assessment fees pay for the pipe that collects your wastewater
  • How are the fees calculated?

    We calculate the fees during the plan review process based on the information you or your representative provide to us— each instance is different. Fees are charged for using additional sewer system capacity. This includes the construction of a new building or making improvements to an existing building that adds plumbing fixtures or changes the facility's use.

    The fees are calculated based on the impact your expected wastewater discharges will have on the system. We look at the expected volume of flow, the expected strength of the wastewater, and in some cases, the length of pipe running in from of your property to calculate the fee amounts.

  • The fees can amount to a lot of money. Can you help in any way?

    We have a low interest fee deferral program for existing single family residences, commercial buildings, and restaurants. The deferrals must be secured by property with Ada County. We do not offer reduced fees or fee waivers. 

  • What else do I need to know?

    Once you are connected to the system, you will receive a monthly bill that pays for the operation and maintenance of the system based on the amount of wastewater you discharge.

    It is also important to know that Boise staff is required by law to periodically evaluate discharges from our major customers. Restaurants are required to follow grease abatement standards. Industrial businesses are monitored mostly for metals and chemicals used in the manufacturing processes. For more information, you may contact the pretreatment staff at 384-3901.

  • How do I find out what my fees are?

    Call Sewer Rating at 208-608-7150 for sewer fee calculation and information.