Mo. Rev. Stat. § 77.530
The council may make regulations and pass ordinances for the prevention of the introduction of contagious diseases into the city, and for the abatement of the same, and may make quarantine laws and enforce the same within five miles of the city. The council may purchase or condemn and hold for the city, within or without the city limits, within ten miles therefrom, all necessary lands for hospital purposes, waterworks, sewer carriage and outfall, and erect, establish and regulate hospitals, workhouses, poorhouses, police stations, fire stations and provide for the government and support of the same, and make regulations to secure the general health of the city, and to prevent and remove nuisances; provided, however, that the condemnation of any property outside of the city limits shall be regulated in all respects as the condemnation of property or railroad purposes is regulated by law; and provided further, that the police jurisdiction of the city shall extend over such lands and property to the same extent as over public cemeteries, as provided in this chapter.
§ 77.530, RSMo