SB 375 Regional Targets - 2026 Update
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MPO Regional Targets Recommendations
This page has emails and letters between CARB and MPOs about the 2026 SB 375 regional targets update. See the SB 375 Regional Targets webpage for general information about the targets.
CARB exchanges technical information with MPOs as part of the regional targets update. This is required in SB 375 and promotes an inclusive process. CARB staff sent a formal request on July 29, 2024, for MPOs’ recommendations and analysis. Several rounds of communication followed. The links below show the primary written communications through the end of 2025.
As available, these communications will be linked from the list below.
2024 CARB target recommendation request
July 29, 2024 – CARB email to MPOs requesting target recommendations
July 29, 2024 – CARB letter attachment to MPOs requesting target recommendations
July 29, 2024 – CARB spreadsheet to MPOs requesting target recommendations – Excel file; please contact CARB to request a copy
2024 Joint MPO letters to CARB
September 20, 2024 – Big 4 MPOs letter to CARB regarding guidelines and targets
September 23, 2024 – CCC MPOs letter to CARB regarding guidelines and targets
September 27, 2024 – BCAG, SRTA, and TRPA letter to CARB regarding guidelines and targets
October 15, 2024 – San Joaquin Valley MPOs letter to CARB regarding guidelines and targets
2024 CARB responses to joint MPO letters
October 23, 2024 – CARB letter to Big 4 MPOs
October 24, 2024 – CARB letter to CCC MPOs and small MPOs
November 1, 2024 – CARB letter to San Joaquin Valley MPOs
2024 Individual MPO letters and responses
October 25, 2024 – SLOCOG email to CARB regarding target recommendation request
November 1, 2024 – BCAG email to CARB regarding target recommendation
November 1, 2024 - BCAG spreadsheet – Excel file; please contact CARB to request a copy
2025 Joint MPO letter to CARB
June 9, 2025 – Big 4 MPO letter to CARB on the target update