Mo. Rev. Stat. § 250.230
When determined by its governing body to be in the public interest and necessary for the protection of the public health, any municipality is authorized to enter into and perform contracts, whether long-term or short-term, with any industrial establishment for the provision and operation by the municipality of sewerage facilities to abate or reduce the pollution of waters caused by discharges of industrial wastes by the industrial establishment and the payment periodically by the industrial establishment to the municipality of amounts at least sufficient, in the determination of such governing body, to compensate the municipality for the cost of providing (including payment of principal and interest charges, if any), and of operating and maintaining the sewerage facilities serving such industrial establishment.
§ 250.230, RSMo