Teton Water and Sewer Company Tariff Revisions Notice

ORDER NO. 36973 1 Office of the Secretary Service Date March 19, 2026 BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION IN THE MATTER OF TETON WATER AND SEWER COMPANY, LLC’S APPLICATION FOR TARIFF REVISIONS ) ) ) ) ) ) ) ) ) ) ) ) CASE NO. TTS-W-26-02 NOTICE OF SUSPENSION OF PROPOSED EFFECTIVE DATE NOTICE OF MODIFIED PROCEDURE ORDER NO. 36973 On February 19, 2026, Teton Water and Sewer Company, LLC (“Company”) applied to the Idaho Public Utilities Commission (“Commission”) requesting to revise Rate Schedule No. 2, Non-Recurring Fees and Charges (“Schedule No. 2”). The Company requested a March 1, 2026 effective date. With this Order we issue notice of the Company’s Application, suspend the Company’s proposed effective date, and set public comment and Company reply deadlines. YOU ARE HEREBY NOTIFIED that the Company proposes to increase the Hookup Charge from $600 plus incremental costs to a single flat charge of $2,913. Application at 1. YOU ARE FURTHER NOTIFIED that the Company proposes to modify the language of Schedule No. 2 to include: 1. “Installation of the meter vault, service line, fittings, and related appurtenances located at the curb stop are performed by the customer’s contractor, and not by the Company.” 2. “The Company’s role in a standard new service connection is limited to: inspection of customer-installed facilities prior to backfilling; pressure testing to verify the absence of leaks; and installation and activation of the water meter.”

ORDER NO. 36973 2 3. A definition of customer responsibility for actual construction costs associated with a request for a service connection larger than one (1) inch, subject to Company inspection and approval. Id. YOU ARE FURTHER NOTIFIED that the Company believes the proposed updates to Schedule No. 2 are necessary to provide greater transparency between the Company and its customers. Id. at 2. YOU ARE FURTHER NOTIFIED that the Application is available for public inspection during regular business hours at the Commission’s office. The Application is also available on the Commission’s website at www.puc.idaho.gov. Click on the “WATER” icon, select “Open Cases,” and click on the case number as shown on the front of this document. YOU ARE FURTHER NOTIFIED that all proceedings in this case will be held pursuant to the Commission’s jurisdiction under Title 61 of the Idaho Code, and that all proceedings in this matter will be conducted pursuant to the Commission’s Rules of Procedure, IDAPA 31.01.01.000 et seq. SUSPENSION OF PROPOSED EFFECTIVE DATE The Company filed its Application on February 19, 2026, proposing a March 1, 2026, effective date. The Commission finds that the Company’s proposed effective date does not provide adequate time for Commission Staff (“Staff”), and interested persons, to evaluate the Company’s proposal. Pursuant to Idaho Code § 61-622, the Commission suspends the proposed changes for thirty (30) days and five (5) months or until the Commission enters an order accepting, rejecting, or modifying the proposed rate increases. YOU ARE FURTHER NOTIFIED that the Commission has determined that the public interest may not require a formal hearing in this matter, and that it will proceed under Modified Procedure pursuant to the Commission’s Rules of Procedure 201-204, IDAPA 31.01.01.201-.204. The Commission notes that Modified Procedure and written comments have proven to be an effective means for obtaining public input and participation. YOU ARE FURTHER NOTIFIED that persons desiring to state a position on this Application may file a written comment explaining why the person supports or opposes the Application. Persons who would like a hearing must specifically request a hearing in their written

ORDER NO. 36973 3 comments and explain why written comments alone are insufficient. Persons interested in filing written comments, must do so by April 21, 2026. Comments must be filed through the Commission’s website or by e-mail unless computer access is unavailable. To comment electronically, please access the Commission’s website at http://www.puc.idaho.gov/. Click the “Case Comment Form” and complete the form using the case number as it appears on the front of this document. To file by e-mail, persons must e-mail the comments to the Commission Secretary and all parties at the e-mail addresses listed below. Persons submitting a comment by e-mail must provide their name, address, and the Case Number under which they are commenting. Persons submitting a comment by e-mail also acknowledge that submitting a comment in an open case constitutes a public record under Idaho Code § 74-101(13), and all information provided by such person is available for public and media inspection. If computer access is unavailable, then comments may be mailed to the Commission and the Parties at the addresses below. Persons submitting a comment by mail must provide their name, address, and the Case Number under which they are commenting. Persons submitting a comment by mail also acknowledge that submitting a comment in an open case constitutes a public record under Idaho Code § 74-101(13), and all information provided by such person is available for public and media inspection. For the Idaho Public Utilities Commission: Commission Secretary Idaho Public Utilities Commission P.O. Box 83720 Boise, ID 83720-0074 secretary@puc.idaho.gov For the Company: Jon Pinardi Teton Water & Sewer Company P.O. Box 786 Driggs, ID 83433 tetonws@silverstar.com YOU ARE FURTHER NOTIFIED that the Company must file any reply comments by April 28, 2026. YOU ARE FURTHER NOTIFIED that if no written comments or protests are received within the time limit set, the Commission will consider this matter on its merits and enter its final order without a formal hearing. If written comments are received within the time limit set, the Commission will consider them and, in its discretion, may set the same for formal hearing.

ORDER NO. 36973 4 ORDER IT IS HEREBY ORDERED that this Application be processed under Modified Procedure. Persons interested in submitting written comments must do so by April 21, 2026. The Company must file any reply comments by April 28, 2026. IT IS FURTHER ORDERED that the Company’s proposed effective date of March 1, 2026, for its proposed update to Schedule No. 2 is suspended for thirty (30) days plus five (5) months or until the Commission enters an earlier order accepting, rejecting, or modifying the proposed rate increases. IT IS FURTHER ORDERED that parties comply with Order No. 35375, issued April 21, 2022. Generally, all pleadings should be filed with the Commission electronically and will be deemed timely filed when received by the Commission Secretary. See Rule 14.02. Service between parties should continue to be accomplished electronically when possible. However, voluminous discovery-related documents may be filed and served on CD-ROM or a USB flash drive. DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho this 19 th day of March, 2026. __________________________________________ EDWARD LODGE, PRESIDENT __________________________________________ JOHN R. HAMMOND JR., COMMISSIONER __________________________________________ DAYN HARDIE, COMMISSIONER ATTEST: Monica Barrios-Sanchez Commission Secretary I:\Legal\WATER\TTS-W-26-02RRSch2\orders\TTSW2602ntcappsusmodem.docx