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New MS4 Permit Resources

The Indiana Department of Environmental Management (IDEM) has converted the 327 IAC 15-13 (Rule 13 – Municipal Separate Storm Sewer Permit) and 327 IAC 15-5 (Rule 5 – Construction Stormwater Permit) to master general permits. 


Helpful information and supplemental links are included below:


Permit Information/Links:

IDEM's web site with more information on stormwater permits: 

IDEM: Storm Water Permitting: Stormwater Program Transition to Master General Permits

The new MS4 general permit: mgp_ms4_final.pdf

The new Construction Stormwater General Permit (CSGP): mgp_csgp_final.pdf

Stormwater Model Ordinance and Technical Standards publications:

Popular Publications - Local Technical Assistance Program (LTAP) - Purdue University

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