Mo. Rev. Stat. § 640.735

Within twenty-four hours, any unauthorized discharge by a flush system animal waste wet handling facility that has crossed the property line of the facility or any unauthorized discharge by a flush system animal waste wet handling facility of which the failsafe containment structure or earthen dam has failed to contain and has crossed the property line of the facility, or enters waters of the state shall be reported to the department and to all adjoining property owners of the facility as listed on the site-specific permit.