Prevention of Significant Deterioration (PSD) Projects

Prevention of Significant Deterioration (PSD) applies to new major sources or major modifications at existing sources for pollutants where the area the source is located is in attainment or unclassifiable with the National Ambient Air Quality Standards (NAAQS).  For additional information regarding PSD permitting requirements in SCAQMD, please refer to Regulation XVII.

For projects that are subject to SCAQMD Regulation XVII - Prevention of Significant Deterioration (PSD), the public may request to be put on a mailing list for additional notices on permitting activities in accordance with 40 CFR Part 124, Section 124.10.

To search for the Public Notice and Draft Permit for proposed PSD project(s), click here.  (Enter * in the Facility Name field to view all Proposed PSD Projects)

To provide comments on proposed PSD project(s), click here.

To search for comments submitted for PSD projects, click here.
Anyone interested in these types of projects and who would like to be placed on a mailing list to receive further information on any PSD permitting activities can sign up for email alerts, or for mail alerts.

To sign up for email alerts, click here.    

To sign up for alerts by US postal mail, submit this form:  200PSD v2.  

If you have any questions regarding PSD permitting activities, please contact David Hauck ( or 909-396-2512.