Rate Summaries and History

Browse this section to view our billing rate summaries, history of general rate changes, history cost of gas and Oregon and Washington billing rate histories.

  • Billing rate summaries—Summary of monthly sales and transportation billing rates for Oregon and Washington.
  • General rate case filing—On Dec. 29, 2017, NW Natural filed for a general rate increase. The filing will be reviewed by the Public Utility Commission of Oregon and other stakeholders. The process could take up to 10 months with new rates effective Nov. 1, 2018. This general rate case filing does not include the impact to customers’ rates of the newly passed federal tax legislation. The implications of tax reform will be addressed with the regulators in the coming months through this general rate case filing or as part of other regulatory processes that could include all utilities in Oregon.
  • History of general rate changes—General rate case history from 1975 - present.
  • History of cost of gas—Annual and winter sales weighted average cost of gas from 1988 - present.
  • Oregon billing rate histories—Rates - Schedule 2 through 33.
  • Washington billing rate histories—Rates - Schedule 1 through 43.