Phase II Small Municipal Separate Storm Sewer System (MS4) Program

Introduction

On December 8, 1999, U.S. EPA promulgated the Storm Water Phase II Final Rule under authority of the Clean Water Act (CWA) § 402(p)(6). The regulations require State Water Board to issue an NPDES permit for operators of Small MS4s. Visit the California State Water Board website for more information on the Small MS4 Phase II program. The current Phase II Small MS4 permit is Water Quality Order No. 2003-0005-DWQ, NPDES General Permit CAS000004.

• Link to California State Water Board
• Subscribe to the Regional 9 Small (Phase II) MS4 Permit Lyris list for emailed notifications and updates

Current Entities Seeking Coverage Under the Phase II Small MS4 Permit (updated August 15, 2011)

• 22nd District Agricultural Association - Del Mar Fairgrounds and Horse Park

Notice of Public Comment Period

The San Diego Water Board hereby notifies the public that the 22nd District Agricultural Association (22nd DAA) - Del Mar Fairgrounds and Horse Park Storm Water Management Plan (SWMP) is available for review and public comment. Written comments on the SWMP must be received by 5:00pm on October 18, 2011. The Public Notice, SWMP, and Attachments are available below:

• Public Notice
• 22nd DAA - Phase II SWMP - Del Mar Fairgrounds and Horse Park
• Attachment 1 - Nutrient Management Plan
• Attachment 2 - San Diego County Model SUSMP