The Boise sewer system is a collection of more than 900 miles of pipes that weave underneath the city. Along with regular system maintenance, Public Works makes major repairs and is in charge of designing the system.
In general, fees paid to the city prior to connection to the sanitary sewer system consist of two major components: connection (capacity) fees and assessment fees. These fees do not pay a contractor to complete the physical connection from the building to the edge of the right of way.
All new and expanding water renewal customers must purchase capacity in the city’s system. Capacity fees are comprised of three parts: trunk fees, treatment fees, and equivalent assessment fees.
- Trunk fee – Designed to recover the cost of pipelines transporting used water throughout the city.
- Treatment fee –Designed to recover the cost of maintaining water renewal facilities.
- Equivalent Assessment fee –Any person initiating water renewal service in the City who has not contributed proportionately toward the costs and expenses of constructing pipelines, manholes, and lift stations adjacent to the property shall pay an additional fee. This fee is typically seen on a parcel that has never been developed or has never connected to the system.
For questions about capacity fees, please call 208-608-7150.
The assessment fee is based on the average cost of an 8-inch sewer line in the street and will include a service line to the edge of the right-of-way of your property. The assessment is an average cost to construct pipe, manholes, pavement restoration, and permits as well as design, survey and inspection of the project. The assessment fee is an average cost of projects rather than dividing the cost of the particular project which serves your area.
Not all properties will pay an assessment fee. New subdivisions are required to pay the assessment and to construct sanitary sewers within the subdivision boundaries at the time of development. The costs for sewer are then included in the cost of your subdivision lot. If you are building on an existing lot which is being split or connecting an existing building to sanitary sewer, you should expect to pay the assessment component of the fees.
Sewer Services and Information
If you are an industrial or commercial business that discharges or plans to discharge wastewater into the Boise sewer system, find out the requirements that may apply to your discharge.
Permits and Requirements
View development permits and requirements for sewer projects in the City of Boise.
Twenty Mile South Farm
The City of Boise owns and operates a 4225-acre farm on South Cloverdale Road. The Twenty-Mile South Farm receives biosolids from the city's two main water renewal facilities.
Residential Fats, Oils and Grease Program
Learn about items you should always try to keep out of your drain: fats, oils and grease.
The Boise WaterShed is a partnership with Public Works and provides educational services on water renewal, water treatment, and water protection and conservation.
For information on design requirements, please call (208) 608-7150.
Connection Fees or Extensions
For information on connection fees and / or extensions, please call (208) 608-7150.
For sewer back-ups, line breaks or construction issues, call (208) 608-7200.
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