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The municipal separate storm sewer system (MS4) toolkit is a resource for stormwater program staff. It is intended to help entities regulated under the MS4 program meet the requirements of the general permit. It offers a wide range of stormwater education information including sample fact sheets, newsletters, videos, and other resources.

Documents in the MS4 toolkit are available to all site users for download and use.

MCM 1: Public education and outreach

The information in this section provides MS4 permittees with tools they can use to meet MCM 1, which addresses public education and outreach.

Stormwater overview

The following pages address general general stormwater topics.

What residents can do

The following pages address what residents can do to reduce negative impacts on stormwater.

Special audiences

MCM 3: Illicit discharge detection and elimination (IDDE)

The information in this section provides MS4 permittees with tools they can use to meet MCM 3, which addresses illicit discharge detection and elimination.

MCM 4: Construction site stormwater runoff

The information in this section provides MS4 permittees with tools they can use to meet MCM 4, which addresses construction site stormwater runoff.

MCM 5: Post-construction stormwater management

The information in this section provides MS4 permittees with tools they can use to meet MCM 5, which addresses post-construction stormwater management.

MCM 6: Pollution prevention/good housekeeping for municipal operations

The information in this section provides MS4 permittees with tools they can use to meet MCM 6, which addresses pollution prevention/good housekeeping for municipal operations.