General Industrial activities Storm Water Permit
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Industrial site with exposure.
Photo by Gerry Jarmuz
Storm Water Program Coordinator
Learn more about the different types of industrial storm water permits and requirements.
Tier 1 and Tier 2 industrial facilities
Natural Resources Chapter 216, Wis. Adm. Code, (NR 216) lists certain types of industries in the state that need to obtain storm water discharge permits from the Department of Natural Resources. Permits are issued under a tiered system that groups industries by type and by how likely they are to contaminate storm water. NR 216 lists industries by Standard Industrial Classification (SIC) code. See NR 216 [PDF] for complete information on listings of industrial activities by SIC and tier. Here is a brief summary of how industries are classified by Tier:
See EPA guidelines for Conditional No Exposure Exclusion [exit DNR]. The no exposure exclusion is determined on a case-by-case basis at industrial sites where storm water is not contaminated by industrial activity.
To request the no exposure exclusion, an appropriate representative of the facility must file a request on the DNR No Exposure Certification Form # 3400-188 [PDF].
An industry facility granted no exposure status is required to reapply for no exposure every five years to re-certify the facility’s no exposure status.
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