Author Archives: Cody Hess

Yolo-Solano AQMD Releases 2023 Annual Report

2023 stands out as a truly transformative period marked by innovation, collaboration, and heightened efficiency. This report summarizes the collective efforts of each division, illustrating the strides made in attaining goals and advancing the overall mission of the District.

The 2023 Annual Report provides an overview to the public on District activities and programs, local air quality issues, offers transparency in budgeting and accounting practices, and highlights work completed during the last year to protect health and improve air quality within the District. This comprehensive document not only encapsulates the district’s endeavors over the past year but also sets a promising trajectory for the future of air quality management in the region.

Moreover, the report highlights the collaborative efforts undertaken by the YSAQMD in partnership with local governments, businesses, community organizations, and residents. Through strategic alliances and stakeholder engagement initiatives, the district has fostered a culture of shared responsibility and collective action towards achieving cleaner air for all.

Read Full Report Here

Submit Your Annual Throughput Reports

For every Permit to Operate (PTO), facilities are required to submit an annual throughput form that identifies the level of production for that permitted process. This information is compiled by the District to quantify actual emissions from each of the permitted sources, and then the District develops an emissions inventory which is reported annually to the California Air Resources Board.

The District doesn’t mail Throughput Forms. Instead, they are provided electronically. The forms have been emailed to each facility’s responsible contact and are also available by clicking the link FIND YOUR FORM below.

Click the link INSTRUCTIONS for guidance on completing the Throughput Forms. The forms are due by March 31, 2024. Please note electronic or digital signatures are accepted.

Permit holders who fail to submit the requested information may have their PTOs revoked. Operating without a permit is a violation of District rules and state law and involves serious penalties.

Please submit your throughput report(s) by e-mail to the District at (best option) or via mail or fax (530-757-3670).

If you have questions, need assistance, or would like the District to send you a blank Throughput Report form specific to your permit(s), please send an e-mail request with your permit number(s) to

If you need to speak with someone, please call the District at (530) 757-3650.