In 2019, California Assembly Bill 423 (AB 423) amended the
California Health and Safety Code which directed the District to
consider adopting an indirect source rule to address pollution from
mobile sources that is associated with stationary sources such as
ports, warehouses, and distribution centers. Per the AB 423
requirement, District staff researched potential indirect source rule
concepts, met with stakeholders, and evaluated indirect sources such
as ports, warehouses, and distribution centers located throughout San
Diego County. The District's Governing Board also directed staff to
convene a working group of community and industry stakeholders to
consider and develop potential alternative regulatory and
non-regulatory strategies that could further reduce indirect source
emissions at the community level. The purpose of the Warehouse
Working Group (WWG) was to offer input to the District regarding
potential regulatory and non-regulatory strategies to reduce air
pollution and public health impacts from heavy-duty trucks and other
indirect sources associated with warehouses and distribution centers
in the San Diego region, with priority to those facilities in
under-resourced communities. At its meeting on May 14, 2026, the San
Diego County Air Pollution Control District Governing Board considered
an item relating to indirect source emissions at Warehouses and
Distribution Centers. A recording of the meeting can be viewed
here.
**At its April meeting, the San Diego County Air
Pollution Control District Governing Board voted to continue the
item regarding Strategies to Reduce Indirect Source Emissions at
Warehouses and Distribution Centers. The Board is scheduled to hear
the continued item at a special meeting on May 14, 2026. The public
will have an opportunity to submit written and verbal comments at
the May meeting.**
Strategies to Reduce Indirect Source Emissions at Warehouses and
Distribution Centers White Paper
Warehouse Indirect Source Rule (ISR) Framework Supplement - April
2025
Warehouse Working Group Meetings and Documents
10/07/2024, 3:00 p.m. - 5:00 p.m.
09/03/2024, 3:00 p.m. - 5:00 p.m.
08/05/2024 - Meeting Cancelled
07/01/2024 - Meeting Cancelled
06/03/2024, 3:00 p.m. - 5:00 p.m.
05/06/2024, 3:00 p.m. - 5:00 p.m.
04/02/2024 - No Meeting
03/04/2024, 3:00 p.m. - 5:00 p.m.
02/05/2024, 3:00 p.m. - 5:00 p.m.
01/02/2024, 3:00 p.m. - 5:00 p.m.
12/04/2023, 1:00 p.m. - 3:00 p.m.
11/06/2023, 1:00 p.m. - 3:00 p.m. (Kick-off Meeting)
09/25/2023, 2:00 p.m. - 4:00 p.m. (Orientation Meeting)
References