AQ Programs

​Implementing EPA’s Clean Power Plan in Oregon

This webpage covers DEQ’s process to develop an Oregon plan for implementing the EPA’s requirement to reduce carbon pollution at coal and natural gas power plants.
DEQ’s process to implement the Clean Power Plan in Oregon is on hold. The U.S. Supreme Court ordered EPA to halt enforcement of the federal rule while it is reviewed by a lower court. DEQ will reinitiate Oregon’s process once there is more clarity on the status of the federal rule. 
Sign up for email updates on the Clean Power Plan.

EPA’s proposal to repeal the Clean Power Plan

EPA is proposing to repeal the Clean Power Plan. EPA proposes a change in the legal interpretation as applied to section 111(d) of the Clean Air Act, on which the Clean Power Plan was based. EPA is accepting comment on their proposed repeal until January 16, 2018. More information about EPA’s proposal is available here.
DEQ, in cooperation with staff at the Oregon Department of Energy and the Public Utility Commission, is developing a comment letter to submit to EPA. A draft outline of this comment letter is available here:
  • Draft outline for letter from DEQ to EPA on proposal to repeal the Clean Power Plan
DEQ is soliciting to comments on this draft outline until January 5, 2018. We will hold a public meeting on January 4, 2018 to discuss our input on EPA’s proposed repeal.
Comments can be submitted to DEQ by email to or mailed to:
Attn: Air Quality - Clean Power Plan
Oregon Department of Environmental Quality
700 NE Multnomah
Portland OR, 97232

Public meeting:

  • What: Discuss Oregon input on EPA’s proposed repeal of the Clean Power Plan
  • Where: DEQ Headquarters: 700 NE Multnomah, Portland OR 97232, 3rd floor
  • When: January 4th, 2018 at 9:30am


On June 2, 2014 U.S. EPA issued a proposal known as the Clean Power Plan to reduce carbon dioxide emissions from existing fossil fuel power plants. Power plants are the largest source of carbon pollution in the U.S., accounting for roughly one-third of all domestic greenhouse gas emissions. EPA estimates that the proposed Clean Power Plan would cut national carbon pollution from power plants by 30 percent from 2005 levels. Smog and soot pollution from power plants are also expected to be reduced by 25 percent.
On August 3, 2015 the EPA finalized the Clean Power Plan. The final rule includes state specific CO2 reduction targets based on the composition of natural gas and coal plants within each state. The rule also provides states with broad flexibility to determine the preferred mechanisms for reducing CO2 emissions from these facilities.
An important part of our early planning is to determine the type of emission standard that will work best for Oregon. EPA gives states the option to choose from two types of emission targets:
  1. Emission rate: This would apply an emission rate standard at each coal and natural gas power plant that is expressed as pounds of CO2 emitted per megawatt hour (MWh) of electricity generated at the facility.
  2. Mass cap: this would establish an overall limit to the total CO2 emissions from all existing coal and natural gas power plants within the state.
To help inform our assessment of this important decision, we issued a document outlining conceptual compliance scenarios with different ways that an emission rate or a mass cap could be implemented in Oregon.
DEQ issued the two documents linked above for comments by stakeholders in December 2015. Following is a summary of the comments received by stakeholders sent in January 2016.

Current work

DEQ’s Clean Power Plan work is on hold while the EPA rule is reviewed in federal court. DEQ will reinitiate work with the Department of Energy, the Public Utility Commission, and stakeholders once the timeline and requirements of the Clean Power Plan are reissued.
wind turbines


Phone: 503-229-5094
Toll-free in Oregon: 800-452-4011, ext. 5094.