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Rates Information

The Value of Water

Before it reaches your home or business, water is treated, stored and delivered through a complex process. Water begins its journey at the source -- rivers or wells -- and travels through sophisticated water treatment plants to its final destination, your tap. All along the way, our teams of certified operators, scientists and engineers use the latest technology to monitor the water's quality and progress. Reliable high-quality water service improves our lives and communities by:

  • Protecting public health
  • Providing fire protection
  • Creating opportunities for economic growth

Missouri American Water teams are dedicated to being responsible stewards of our communities' water systems. We invest in needed system improvements and manage operating and maintenance costs to help ensure quality, reliable water service now and in the future. At about a penny a gallon, water service is an exceptional value.

PSC Rate Order – March 7, 2012

Following an eight-month review, the Missouri Public Service Commission (MOPSC) has approved a rate adjustment on a statewide basis for customers of Missouri American Water.  Missouri American Water’s ongoing investments in water and wastewater system improvements, and the increasing costs of delivering high-quality, reliable service to customers, were the main drivers behind the rate changes. The new rates reflect infrastructure investments of approximately $115 million statewide from May 1, 2010 to December 31, 2011. Following are summaries of the water and wastewater rates and service information for the districts that we serve.

Rate Case Fact Sheets

Brunswick Water
Cedar Hill Wastewater
Jefferson City Water
Jefferson City-area Wastewater (former Aqua Missouri customers)
Joplin Water
Lake Carmel Water and Wastewater
Lake Taneycomo Water
Lakewood Manor Water
Loma Linda Water
Maplewood Water and Wastewater
Mexico Water
Ozark Meadow Wastewater
Ozark Mountain Water
Platte County Water and Wastewater
Rankin Acres Water
Riverside Estates Water
St. Charles County Water
St. Joseph Water
St. Louis County Water
Spring Valley Water
Stonebridge Water and Wastewater
Warren County Water and Wastewater
Warrensburg Water
White Branch Water

How Water Rates are Set

Water service rates are based on the real costs of treating and delivering water to customers, and are regulated by the Missouri Public Service Commission (PSC). All Missouri American Water customers are charged rates approved by the PSC. You can learn more at the PSC web site:

 Public Service Commission To determine rates, Missouri American Water and the PSC staff study the costs that the company has incurred for system improvements, maintenance, operation, administration and financing. Once the studies are complete, the company, the PSC and other interested parties present any differing conclusions before an administrative law judge. The public may attend public hearings or submit comments directly to the PSC staff.  The rate review process typically requires eleven months to complete and a final decision is made by the PSC. Rates and billing frequency vary based on geographic area. In most areas, customers are billed based on a regular meter reading. Some wastewater service customers are billed based on a flat-rate billing. Missouri American Water rates are based on the true cost of providing water service to our customers. Rates vary based on the cost of providing service in each of the communities we serve.


ISRS charge for Saint Louis County Operations

Following are the tariffs issued by the Missouri Public Service Commission on March 30, 2012.

Certified Area and Table of Contents

Tariff - MO Water Rates 

Tariff - Cedar Hill 

Tariff - Incline Village 

Tariff - Sewer Stone & Taney Counties