Mo. Rev. Stat. § 701.059 – Creation of a nuisance on certain residential property is an infraction — sewage disposal system in violation, statute of limitations starts to run, when

1. Any person or property owner who creates a nuisance or imminent health hazard as defined in section 701.025 on any single-family residence lot of three acres or more is guilty of an infraction.
2. For the purposes of section 516.120, the statute of limitations begins to run when an owner knows or should have known that an on-site sewage disposal system contractor had installed a defective system, a system which was inappropriate for the site or had installed a system incorrectly.

(L. 1994 S.B. 446 § 701.055 subsecs. 4, 5)