General Industrial Storm Water

This page contains documents related to the General Industrial Permit (IGP).  Please note that documents relevant to the IGP (forms, SWPPP template, guidance, etc.) are in a separate list at the bottom of this webpage.  Also be aware that the document list is a two page list.  If you don't find what you need on the first page be sure to check the second page by clicking the '2' or 'next' at the bottom of the list.

Certain industrial facilities are required to seek coverage under the general industrial storm water permit. Facilities most commonly covered in Wyoming are most mines (mineral mines are covered under the mineral mining permit, see above), facilities that produce cement products, many wood product facilities, airports, junk yards, and scrap recycling facilities. Coverage is based on the facility's Standard Industrial Classification (SIC) code.

Please note that the general industrial storm water permit is not available to facilities where storm water runoff has the potential to discharge to class 1 waters. Facilities may apply for coverage under an individual storm water permit. Contact us

  • Beginning July 1, 2013 payment of permit fees for individual permits and general permit authorizations are required to be submitted with the permit application or NOI form.  All storm water authorizations have variable fees that must be calculated depending upon the NOI date.  The "Fee Calculator" should be used to determine the proper amount to be submitted with each NOI.  Checks should be made out to the "Dept. of Environmental Quality, Water Quality Division.

List of documents:  Links to documents relevant to IGP can be found in the document list at the bottom of the page.  In this table you will find explanations for some of the most used documents.

Doc Title


Industrial General Permit (IGP)

Effective March 1, 2018 and expires August 31, 2022 (includes SWPPP guidelines in Part 8)

Notice of Intent (NOI)

Use to request coverage under the IGP.  Use only this current version of the NOI.  Please note that the NOI has been updated to include new land access requirements.  Applicants must now certify that they have (i) secured permission for DEQ personnel and invitees to access land where the facility is located, (ii) secured permission to collect resource data as defined in Wyoming statute, and (iii) secured permission to enter and cross all properties necessary to access the permitted facility.  A map of the access route(s) shall accompany the NOI.  (01/05/2021). 

Table of Regulated SIC Codes

Table of Standard Industrial Classification (SIC) codes regulated under the IGP

Outfall Characterization Table

This table is only for facilities subject to federal effluent limits and covered under the general permit:  cement manufacturing, asphalt emulsion manufacture and coal pile runoff.  (5/12)

Notice of Transfer and Acceptance (NOTA)

Use to transfer IGP coverage to a new operator.   This is a new NOTA version.  Please use this version for all future transfers.  (06/2016)

Notice of Termination (NOT)

Use to discontinue coverage under the IGP.  See Part 5 of the permit for the specific conditions that must be met in order to terminate coverage.  (revised 5/15)

No Exposure Certification and Guidance

The No Exposure Certification may be used by any industrial facility, regulated under the storm water program, where industrial materials and activities are sheltered from storm water.  Submission of a No Exposure Certification constitutes notice to WDEQ that the facility does not require coverage under the industrial storm water general permit.  The certification is renewable every five years and is verifiable by WDEQ.  (01/05/2021)

No Exposure Change of Status Form

Use this form to assign the No Exposure Certification to a new operator, indicate a change in business activity on the site or provide information on the closure of the site. 5/09

Class 1 Waters

Class 1 waters in Wyoming.  Discharges to class 1 waters cannot be authorized under the IGP.


File Date