Structural Stormwater Controls workgroup

The Phase I Municipal Stormwater Permit includes a program requirement for Structural Stormwater Controls, which requires permittees to prevent or reduce impacts to waters of the state caused by discharges from the MS4s. 

We are working through a stepwise approach with our stakeholders to inform the structural stormwater control program requirements for the 2024-2029 permit.

Go to our meeting webpage for the latest information

The Phase I Municipal Stormwater Permit regulates discharges from municipal separate storm sewer systems (MS4s) owned or operated by the state's largest cities and counties.