Capitol Water Corporation Rate Increase - 4.4% Approved

Orders

Published March 30th, 2026

Detected March 30th, 2026

Summary

The Idaho Public Utilities Commission issued Order No. 36980 approving Capitol Water Corporation's compliance filing with tariffs reflecting a 4.4% rate increase. The increase was originally authorized in Order No. 36948 based on an $859,867 revenue requirement. The tariffs became effective February 26, 2026, and were approved as filed on March 30, 2026.

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What changed

The Idaho Public Utilities Commission issued Order No. 36980 approving Capitol Water Corporation's compliance filing. The Commission verified that updated tariffs filed March 4, 2026, were consistent with Order No. 36948, which authorized a 4.4% increase to base tariff rates for water service based on an $859,867 revenue requirement. The tariffs are approved as filed with an effective date of February 26, 2026.\n\nThis is a routine compliance approval with no new obligations created. The Company has completed its compliance filing, which is now finalized. Consumers in Capitol Water's service territory will see the 4.4% rate increase reflected in their bills. Any person may petition for reconsideration within 21 days of the service date (March 30, 2026).

Source document (simplified)

Office of the Secretary Service Date March 30, 2026

BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION

IN THE MATTER OF CAPITOL WATER ) CASE NO. CAP-W-25-02 CORPORATION’S APPLICATION FOR ) ORDER NO. 36980 AUTHORITY TO INCREASE ITS RATES ) AND CHARGES FOR WATER SERVICE IN ) THE STATE OF IDAHO ) ) On August 14, 2025, Capitol Water Corporation, (“Company”) filed an application (“Application”) with the Idaho Public Utilities Commission (“Commission”) requesting authority to increase rates and charges for water service in the State of Idaho. On February 26, 2026, the Commission issued Order No. 36948, authorizing a 4.4% increase to the Company’s base tariff rates for water service based on an $859,867 revenue requirement. The Commission directed the Company to submit tariffs in compliance with the rates and charges approved in Order No. 36948 within 30 days of the Order. On March 4, 2026, the Company filed tariffs reflecting the rates approved in Order No.

At the Commission’s Decision Meeting on March 17, 2026, Commission Staff presented a Decision Memo indicating that it had reviewed the compliance filing and verified that the updated tariffs were consistent with Order No. 36948. The Commission now issues this Order approving the updated tariffs contained in the Company’s compliance filing. COMMISSION FINDINGS AND DECISION The Commission has jurisdiction over the Company’s Application and the issues in this case under Title 61 of the Idaho Code including Idaho Code §§ 61-301 through 303. The Commission is empowered to investigate rates, charges, rules, regulations, practices, and contracts of all public utilities and to determine whether they are just, reasonable, preferential, discriminatory, or in violation of any provisions of law, and to fix the same by order. Idaho Code §§ 61-501 through 503. Having reviewed the record and the Company’s compliance filing, the Commission finds that the Company has complied with Order No. 36948.

ORDER NO. 36980 1

ORDER IT IS HEREBY ORDERED that the Company’s compliance filing is accepted. The Company’s tariffs and schedules filed on March 4, 2026, are approved as filed, with an effective date of February 26, 2026. THIS IS A FINAL ORDER. Any person interested in this Order may petition for reconsideration within twenty-one (21) days of the service date upon this Order regarding any matter decided in this Order. Within seven (7) days after any person has petitioned for reconsideration, any other person may cross-petition for reconsideration. Idaho Code § 61-626. DONE by Order of the Idaho Public Utilities Commission at Boise, Idaho, this 30 day of th March 2026. __________________________________________ EDWARD LODGE, PRESIDENT __________________________________________ JOHN R. HAMMOND JR., COMMISSIONER __________________________________________ DAYN HARDIE, COMMISSIONER ATTEST: Monica Barrios-Sanchez Commission Secretary

I:\Legal\WATER\CAP-W-25-02GRC\orders\CAPW2502Comp_jl.docx

ORDER NO. 36980 2