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Small Wastewater (Septic Systems 2000 gallons or less per day)

The Crook County Small Wastewater Regulation and Delegation Agreement became effective May 1, 2019 authorizing Crook County Growth & Development to accept, review, approve  Crook County Small Wastewater Applications for Permit to Construct and perform inspections prior to backfilling or covering of the system.

The fee to obtain a Small Wastewater Permit to Construct or As-Built Permit and Inspection is $200.00.  This fee is established by the Crook County Board of County Commissioners and reviewed by the Board from time to time.  The $200.00 fee shall be submitted with the completed application package. Please make checks payable to Crook County.

Before beginning construction of a Small Wastewater System (Septic System) a  Crook County Small Wastewater Application for Permit to Construct Package must be completed and submitted to Crook County Growth & Development for review and approval for construction by the Crook County Growth & Development Administrator by the issuance of a Permit to Construct.

Submit the completed application package to the Crook County Growth & Development at:

Crook County Growth & Development
Crook County Courthouse
309 E Cleveland Street
P.O. Box 825
Sundance, WY 82729-0825

For additional information or questions regarding the Crook County permitting process contact Crook County Growth & Development at:  (307) 283-4548.

For systems exceeding 2,000 gallons per day or for wastewater that is not entirely domestic waste, contact the Underground Injection Control (UIC) Program at 307-777-5623 or refer to:­-injection-control/.

Delegation Agreement

Small Wastewater Regulation

Small Wastewater Application for Permit to Construct Package

Installer Certification Application

The Crook County Small Wastewater Regulation has a provision for voluntary Installer Certification. Contractors may receive Crook County Certified Installer status by applying for certification and successfully completing a small wastewater system installer examination administered by Crook County Growth & Development. The following  List of Contractors for Installing Septic Systems is provided as a courtesy to the public, ** behind the contractor’s name indicates Installer Certification.