Wisconsin Department of Natural Resources

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Storm water management Frequently asked questions

1) Why do I need a storm water permit? What types of permits are there?

The goal of the Storm water Program is to prevent the movement of pollutants to Wisconsin's water resources by way of runoff. To achieve this goal, there are two types of storm water permits: Construction and Industrial. Construction permits focus in on land disturbing activities that your business may perform when building or expanding. Industrial permits focus on the activities that occur as part of normal business operations (outside storage of materials, utilization of heavy equipment).

2) When do I need a storm water permit? Do I always need a storm water permit?

A construction storm water permit is required for land disturbing activities greater than or equal to one acre. An industrial storm water permit is required depending on what type of business you run (Tier I or Tier 2). A permit is not required for non-exposure conditions.

3) How much do the permits cost?

$260 for a tier 1 industrial general permit; $130 for a tier 2 industrial general permit.

The construction site storm water discharge permit fee is based on the area of land disturbance, from $140 - $350.

4) Generally, when do I need to submit my storm water permit application?

Submittal information is contained in the permit application. Please read your permit application carefully to determine when to submit various portions. Permit applications can be downloaded as Adobe Acrobat PDFs from the Permit Primer Web Site.

5) When is an industrial NOI (for industrial storm water discharges) to be submitted to the Department for a newly constructed industrial facility regulated under subch. II of NR 216?

An industrial NOI must be sent to the Department at least 14 days prior to industrial storm water discharge (not construction activities) and an industrial Storm Water Pollution Prevention Plan (SWPPP) be developed and a SWPPP summary sent to the Department prior to initiating construction. The NOI and an SWPPP example plan can be downloaded from the Permit Primer Web Site or from the Storm Water Runoff website.

6) When is a construction site NOI (for construction site storm water discharges) to be submitted to the Department?

A construction site NOI must be submitted to the Department at least 14 working days prior to any land disturbing activities.

7) How do I terminate a construction site storm water discharge permit?

Once the site has undergone final stabilization, a Notice of Termination (NOT) (3400-162) [PDF] must be submitted to the Department for approval.

8) If my business closes or moves, what do I need to do about my industrial storm water discharge permit?

A Notice of Termination (NOT) (3400-170) [PDF] must be submitted to the Department for businesses that close or change ownership. If the business is moving, an Notice of Intent (NOI) (3400-163) [PDF] must also be filed for the new location.

9) How do I know if my business will fall under a Tier 1 or 2 level?

A business's Standard Industrial Classification (SIC) Code determines which tier level the business will be regulated under. It will not be necessary for you to know your SIC code(s) when using the Permit Primer.

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