Missouri Public Service Commission

JEFFERSON CITY, Mo.---The Missouri Public Service Commission (PSC) has set an intervention deadline of September 19, 2025, in an application from Missouri-American Water Company (Missouri-American) to establish a water and sewer infrastructure rate adjustment (WSIRA) surcharge.

On September 3, 2025, Missouri-American filed a request with the PSC to recover the costs of eligible infrastructure system project costs through implementation of a WSIRA. If approved, the WSIRA surcharge would increase Missouri-American revenues by 2.7% for affected water customer rate classes and by 0.9% for affected sewer customer rate classes. Missouri-American currently provides water service to approximately 486,000 customers and sewer service to approximately 24,000 customers in several counties throughout the state of Missouri.

Applications to intervene and participate in this case must be filed with the Secretary of the Missouri Public Service Commission, P.O. Box 360, Jefferson City, Mo. 65102-0360, or by using the Commission’s Electronic Filing and Information System (EFIS) at psc.mo.gov.

Individual citizens wishing to comment may click the link below, or contact either the Office of the Public Counsel (Governor Office Building, 200 Madison Street, Suite 650, P.O. Box 2230, Jefferson City, Mo. 65102-2230, telephone 866-922-2959, email mopco@opc.mo.gov) or the Public Service Commission Staff (P.O. Box 360, Jefferson City, Mo. 65102, telephone 800-392-4211, email pscinfo@psc.mo.gov). The Office of the Public Counsel is a separate state agency that represents the general public in matters before the Commission.

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Case No. WR-2025-0345

• WR-2025-0345