When is a stormwater permit required?
A COSESCO permit is required for any site that requires coverage by an NPDES General Permit #2 issued by the IDNR.

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1. What is a stormwater utility?
2. What is the stormwater utility rate?
3. What to do if you witness anything other than rain water or snow melt entering a storm drain?
4. When is a stormwater permit required?
5. How do I apply for a COSESCO (Construction Site Erosion and Sediment Control Ordinance) permit?
6. What is a rain garden/bioretention cell?
7. What is a rain barrel?