C.R.S. § 31-35-708

In the event any person using said sewerage system neglects, fails, or refuses to pay when due the rates and charges as fixed by said ordinance, the property of such delinquent person shall not be disconnected from said sewerage system or denied the use thereof, but the rates and charges due and unpaid therefor shall be certified by the clerk to the board of county commissioners of the county in which said delinquent user’s property is located on or before November 1 of each year and thereupon and until paid shall be a lien upon the real property so served by said sewerage connections. The lien shall be levied, certified, received, or collected by sale, annually from year to year by the proper county officials, as are county taxes, and the proceeds thereof shall be remitted each month to such city or town.