C.R.S. § 31-35-701
31-35-701. Cities or towns may provide service outside boundaries
31-35-701. Cities or towns may provide service outside boundaries. Any city or town owning an established sewerage system may, by ordinance, fix just, reasonable, and necessary rates for the connection with and use of the sewerage system, directly or indirectly, by owners of property situated in unincorporated territory without the boundaries of said city or town.