Septic licensing

Wyoming Septic License Requirements (2026)

Wyoming has no statewide septic installer license; septic contractors are licensed or registered locally.

Updated

Does Wyoming require a septic license?

Wyoming has no statewide septic installer license; septic contractors are licensed or registered locally. Wyoming counties license septic installers; DEQ permits only systems of 2,000 gallons per day or more.

Who licenses septic contractors in Wyoming?

County health departments (Wyoming DEQ permits large systems).

Wyoming's septic credentials:

  • County licenses

How to check a septic contractor's license in Wyoming

  1. Wyoming has no public statewide list of septic contractors.
  2. Ask the contractor for their local license or registration number and which county or town issued it.
  3. Call that county health department or town office to confirm it is current.

Septic permits in Wyoming

A contractor license says who may do septic work; a permit authorizes a specific system. In Wyoming, permits for new systems, replacements and most repairs come from the local health department or the state agency office that covers the property. Ask your installer to pull the permit and include the fee in the quote.

Wyoming septic licensing: common questions

Do you need a license to install septic systems in Wyoming?

Wyoming has no statewide septic installer license; septic contractors are licensed or registered locally. Wyoming counties license septic installers; DEQ permits only systems of 2,000 gallons per day or more.

Who issues septic licenses in Wyoming?

County health departments (Wyoming DEQ permits large systems). Wyoming counties license septic installers; DEQ permits only systems of 2,000 gallons per day or more.

How do I check a septic contractor's license in Wyoming?

Wyoming has no public statewide list of septic contractors. Ask the contractor for their local license or registration number and which county or town issued it. Call that county health department or town office to confirm it is current.

Do you need a permit for a septic system in Wyoming?

New septic systems, replacements and most repairs need a permit before work starts. The permit comes from the local health department or the state agency office that covers your property, and the permit, not the contractor license, is what authorizes a specific job.

Sources: County health departments (Wyoming DEQ permits large systems); state license lists loaded into The Septic Guide. See how we verify licenses.