The Utilities and Transportation Commission (commission) regulates privately-owned water companies that serve more than 100 customers or have charges that exceed an average of $471 per customer per year. The commission does not regulate the rates or services of city, town or county water systems, Public Utility Districts, cooperative or homeowners associations. The commission regulates over 60 privately owned water companies, serving 80,000 customers.

List of Regulated Water Companies UTC Water Contacts Water Customer Information Frequently Asked Questions Water Rates Water Services Water Conservation About Commission Water Regulation Interest Rate for Customer Deposits Comment on an Active Case Consumer Guide: Public Utility Services Water Company Information Generic Water Tariff Annual Report Forms Affiliated Interest Report Form How to File Electronic Tariffs Consultant List Commission Laws and Water Rules Title 80 RCW Water Company Rules (Chapter 480-110 WAC) Tariffs and Contracts (Chapter 480-80 WAC) Procedures (Chapter 480-07 WAC) Resources Regulation Definitions Commission Consumer Protection When to Call the Commission Department of Health - Office of Drinking Water National Association of Water Companies UTC Hearing Page UTC Rulemaking Page

Active Cases: Aquarius Utilities, LLC, UW-090819 Burton Water Company, Inc. UW-091050 Burton Water Company, Inc. UW-091051 Cristalina LLC UW-090839 Rainier View Water Company UW-091466 Recent Cases: Cristalina LLC. UW-090516 Summit View Water Works, LLC, UW-090732 Washington Water Service Company, UW-090733