Updated
Does Colorado require a septic license?
Colorado has no statewide septic installer license; septic contractors are licensed or registered locally. Colorado has no statewide septic installer license; each county licenses installers under the state's Regulation 43 standards.
Who licenses septic contractors in Colorado?
County health departments (rules set by CDPHE Regulation 43).
Colorado's septic credentials:
- County systems installer or contractor license
How to check a septic contractor's license in Colorado
- Colorado 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.
Septic permits in Colorado
A contractor license says who may do septic work; a permit authorizes a specific system. In Colorado, 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.
Licensed septic companies in Colorado
The Septic Guide lists 30 septic companies and licensed professionals in Colorado. This is what we could match as of October 2026, not an official count.
All septic companies in Colorado →
Colorado septic licensing: common questions
Do you need a license to install septic systems in Colorado?
Colorado has no statewide septic installer license; septic contractors are licensed or registered locally. Colorado has no statewide septic installer license; each county licenses installers under the state's Regulation 43 standards.
Who issues septic licenses in Colorado?
County health departments (rules set by CDPHE Regulation 43). Colorado has no statewide septic installer license; each county licenses installers under the state's Regulation 43 standards.
How do I check a septic contractor's license in Colorado?
Colorado 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.
How many licensed septic contractors are in Colorado?
The Septic Guide lists 30 septic companies and licensed septic professionals in Colorado (data as of October 2026). This counts what we could match; it is not an official total.
Do you need a permit for a septic system in Colorado?
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 (rules set by CDPHE Regulation 43); state license lists loaded into The Septic Guide. See how we verify licenses.