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Pipeline & Water

Water Utilities

The Commission regulates eight water utilities that provide retail water service to Wyoming customers. These water utilities serve a relatively small number of Wyoming customers, the vast majority of service in the state being provided by municipalities and water and improvement districts which are not regulated by the Commission. The PSC has the following primary duties regarding the regulation of water utilities: Hearing rate cases and approving rates and tariffs for the companies Reviewing, analyzing and hearing water utility applications to pass-on wholesale cost increases in the cost of water Granting certificates of public convenience and necessity for major facilities Establishing accounting and depreciation procedures for utilities Approving mergers, acquisitions and transactions between companies Approving the issuance of securities and creation of liens by the utility Mediating consumer complaints regarding water service issues

Gas and Pipeline Safety Program

The Wyoming Public Service Commission has been authorized by the U.S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration, Office of Pipeline Safety (PHMSA) to perform inspections of Natural Gas Intrastate Transmission Pipelines, Natural Gas Distribution Systems, Liquid Propane Gas Distribution Systems, Direct Sales Lateral, Certain Regulated Gas Gathering Systems and Liquefied Natural Gas Systems in the State of Wyoming. The Commission's Facility Engineering Section will inspect 34 Natural Gas Pipeline Operators and Gas Utilities. The types of inspections that are conducted include the Standard Transmission and Distribution safety inspections, Accident and Incident investigations, Drug and Alcohol Program inspections, Operator Qualification inspections, Integrity Management Program inspections, and any investigations that the Commission may deem necessary.

The Facility's Engineering Staff attempts to inspect each operator annually, but never longer than every other year. The inspections are conducted to insure compliance with 49 CFR §§ 191, 192, 193 and 199. See the PHMSA's website, and click on the regulations button.

If you have any questions or concerns about pipeline safety issues please contact the Commission's Engineering Supervisor at (307) 777-7427 or by email to

2017 Interest Rate

Pursuant to the Wyoming Public Service Commission’s (Commission) Rule Chapter 1, Section 2(a)(xv), the Commission has set the Commission’s Authorized Interest Rate (interest rate) payable on customer deposits held by gas, electric, and water utilities, pursuant to Commission Rule Chapter 3, Section 7; and, affected telecommunications companies, pursuant to Commission Rule Chapter 4, Section 9(g) in the state of Wyoming, at its open meeting held on December 6, 2016. Notice of the requested increase in the interest rate was provided by the Commission’s on-line GovDelivery Email Distribution System on November 30, 2016. The interest rate is set at 2.02% per annum for the period of January 1, 2017, through December 31, 2017.

The interest rate provided for in Commission Rule Chapter 3, Section 7 is also incorporated by reference in Chapter 3, Section 26(i), electric, gas, and water public utility Commodity Balancing Account, as a basis for periodic pass-on filings, when a utility is authorized to charge or collect interest on any over- or under-collected balance in an authorized Commodity Balancing Account.


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Pipeline Utilities
Registration Form

Contact / Address Update Form

Water Utilities
Registration Form

Contact / Address Update Form
Required Filings Cover Sheet