Phase II Small Municipal Separate Storm Sewer System (MS4) Program
Phase II Small MS4 Permit
On February 5, 2013, the State Water Board adopted the Phase II Small MS4 General Permit. Since 2013, the State Water Board adopted five amendments to this Permit. The links below provide the adopted permit, which incorporates all the adopted amendments. This combined Permit will remain marked "unofficial" until an Order number is assigned; however, the Permit, as amended, is fully in effect and enforceable.
- Phase II Small MS4 Permit (Unofficial Draft)
- Provisions for all Small MS4 Permittees
- Fact Sheet
- Attachments and Flow charts
- Attachment A - Traditional Small MS4 List
- Attachment B - Non-Traditional Small MS4 List
- Attachment C - Special Conditions for ASBS Discharges
- Attachment D - ASBS dischargers List
- Attachment E - Education and Outreach Requirements
- Attachment F - Standard Provisions
- Attachment G - Total Maximum Daily Load Requirements
- Attachment H - Acronyms & Abbreviations
- Attachment I - Glossary
- Designation Flow Chart
- Monitoring Flow Chart
Resources
(Updated 09/20/2022)Subscribe to our Email Lists
- Subscribe to our "Storm Water Municipal Permitting Issues" list under the "Water Quality" section.
Questions or Comments
- Paul Levy
Paul.Levy@waterboards.ca.gov
(916) 323-5598
