Urban Service Area

The Urban Service Area defines areas outside the City of Columbia that reasonably could be provided with City services.
Some of these services, such as water and sewer, may already be available beyond the City limits but are subject to out-of-city rates. Other services are only available to properties within the City of Columbia.
While all properties adjacent to the City limits are eligible for annexation, the location and staffing of existing or proposed City services, such as police stations, fire stations, and solid waste routes, means that the City can more readily serve some adjacent areas than others.
In recognition of the importance of providing high quality services to all of its current and future residents, City Council adopted the Urban Service Area plan in 2009 to provide guidance to the public and staff in establishing priorities for annexation. This plan was updated in 2020 and is included within the Community Facilities section of our most recent comprehensive plan, Columbia Compass.
It is important to note that location of a property within the Urban Service Area does not mean that annexation of the property is imminent; instead the classifications within the Urban Service Area reflect a general ranking of the City of Columbia’s ability to provide municipal services to the areas. Ultimately, whether or not to approve a petition to annex a property is a legislative decision of City Council.
The classifications within the Urban Service Area are:

Secondary (light green) areas
Primary Areas consist of contiguous or nearby parcels
with adequate service availability
Will generally be annexed when petitioned
Secondary Areas consist of contiguous or nearby parcels
that have some service concerns
May require additional review to determine ability to service prior to annexation.
Long Range Areas are beyond Primary and Secondary areas that have more service concerns.
May require additional review to determine ability to service prior to annexation.

Donut Holes are islands of unincorporated
properties surrounded by a municipality
Donut Holes - Primary
These are the donut holes where services are readily available and the infrastructure is generally good
Will generally be annexed when petitioned
Donut Holes - Secondary
These are the donut holes where the ability to provide all services and/or the condition of existing infrastructure may not be at optimal levels for annexation at this time.
May require additional review to determine ability to service prior to annexation.
Urban Service Area Plan (PDF)
(from chapter 7 of Columbia Compass: Envision 2036)
Urban Service Area Map (PDF)