CARB EMFAC Off Model Emission Adjustment Factors Lunch-and-Learn
2/24/2026 12:00 PM - 1:00 PM PST
Location: Zoom
Event Description
This lunch‑and‑learn will provide an overview of the recently released EMFAC2021 off‑model adjustment factors, including why they were developed, what they change, and how they affect air quality and greenhouse gas (GHG) emissions modeling and analysis.
For context, in November 2025, U.S. EPA approved CARB’s off‑model adjustment factors for EMFAC2021 to remove the emissions benefits of several California regulations following Congressional resolutions intended to disapprove EPA’s prior waiver decisions. Although those federal actions are currently being contested, CARB staff provided the adjustment factors solely for State Implementation Plan development and conformity determinations, where federal consistency is required.
Because these adjustment factors have raised questions for CEQA practitioners and lead agencies, this lunch‑and‑learn is intended to offer practical background and technical insight to support informed, project‑specific decision‑making.
Recognizing that this is a rapidly evolving area, the session will also provide an opportunity for participants to share experiences and exchange perspectives.
Date: Tuesday, February 24th
Time: 12:00-1:00pm
Ticket: Free for Members and $20 for Non-members
Location: Zoom webinar, zoom link will be sent in confirmation email
