Action on Climate Change


DEQ is in the process of developing a new program to reduce greenhouse gas emissions and address the worsening effects of climate change. This program will establish limits on emissions from some of the most significant sources in Oregon, including large stationary sources, transportation fuels and other fossil fuels, such as natural gas.

DEQ is gathering public input to help identify key issues and will soon move into a formal rulemaking process to develop and propose rules establishing the program. The rulemaking will include further opportunities for public engagement. DEQ intends to propose rules in late 2021, for the program to begin in 2022.

Contracted modeling study

DEQ is contracting with ICF for specialized economic and greenhouse gas and co-pollutant emissions modeling to study design options for the new program to reduce greenhouse gas emissions in Oregon. ICF will model different program scenarios, as instructed by DEQ, to analyze potential effects on:

  • Forecasted greenhouse gas emissions
  • Air quality and public health co-benefits
  • Economic effects on regulated entities, businesses, consumers, and Oregon's economy

ICF will use different modeling tools to forecast emissions and project program effects on public health and the economy. The study will start with a “business as usual" case to represent current regulations, requirements and programs forecasted into the future. In early November, DEQ held an open comment period requesting public and stakeholder feedback on the initial inputs and assumptions to be considered for the business as usual case. Next, various program scenarios will be modeled and compared to the business as usual case as part of the analysis. These results will help inform DEQ's proposed program design for the rulemaking.

Next steps

Program scenarios to be modeled will be developed beginning in early 2021 and will be informed by the Rulemaking Advisory Committee and rulemaking process. Rulemaking Advisory Committee meetings will be held regularly starting in January 2021, where there will be an opportunity to provide input on potentially modeled program scenarios. All Rulemaking Advisory Committee meetings are open to the public and each meeting will provide an opportunity for the public to comment. For the latest information, please visit the Greenhouse Gas Emissions Program 2021 Rulemaking page.

Initial results of the study are expected in early 2021, with final results expected later in 2021. This study is intended to inform the overall program design as well as the fiscal impacts analysis conducted as part of formal rulemaking.​