The Washington Tariff Book.

The following tariff is on file with the Washington Utilities & Transportation Commission and includes all general rules, regulations and rate schedules relating to NW Natural’s service to customers within its service territory in the state of Washington.

See the Index.

Certain documents made available here are approved by the OPUC and the WUTC. Part or all of these documents are subject to change without prior notice. NW Natural does not warrant the accuracy, reliability, or timeliness of any information in this public access system, and shall not be liable for any losses caused by such reliance on the accuracy, reliability, or timeliness of such information. Portions of such information may be incorrect or not current. Any person who relies on any information obtained from this system does so at his or her own risk.

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