Updated
Does Connecticut require a septic license?
Yes. Connecticut requires septic installers to hold a state credential issued by the Connecticut Department of Public Health (licensing through the state eLicense system). Connecticut licenses septic installers and cleaners (pumpers) under Chapter 393a; active licenses are published daily on data.ct.gov.
Who licenses septic contractors in Connecticut?
Connecticut Department of Public Health (licensing through the state eLicense system).
Connecticut's septic credentials:
- Subsurface sewage disposal system installer license
- Subsurface sewage disposal system cleaner license
How to check a septic contractor's license in Connecticut
- Open the Connecticut Department of Public Health (licensing through the state eLicense system) lookup.
- Search by the contractor's name, the license holder's name or the license number.
- Check the license type covers your job (installation, pumping or inspection) and that the status is active.
- If the contractor's business name doesn't come up, ask which person on staff holds the license: several states license individuals, not companies.
Septic permits in Connecticut
A contractor license says who may do septic work; a permit authorizes a specific system. In Connecticut, 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 Connecticut
The Septic Guide lists 1,925 septic companies and licensed professionals in Connecticut, 1,903 matched to the state's published list. Source list: Connecticut State Licenses and Credentials open data. This is what we could match as of October 2026, not an official count.
- Fairfield County (369)
- Litchfield County (286)
- New Haven County (274)
- Hartford County (271)
- New London County (226)
- Middlesex County (213)
- Tolland County (165)
- Windham County (121)
All septic companies in Connecticut →
Connecticut septic licensing: common questions
Do you need a license to install septic systems in Connecticut?
Yes. Connecticut requires septic installers to hold a state credential issued by the Connecticut Department of Public Health (licensing through the state eLicense system). Connecticut licenses septic installers and cleaners (pumpers) under Chapter 393a; active licenses are published daily on data.ct.gov.
Who issues septic licenses in Connecticut?
The Connecticut Department of Public Health (licensing through the state eLicense system) issues Connecticut's septic credentials: Subsurface sewage disposal system installer license; Subsurface sewage disposal system cleaner license.
How do I check a septic contractor's license in Connecticut?
Open the Connecticut Department of Public Health (licensing through the state eLicense system) lookup. Search by the contractor's name, the license holder's name or the license number. Check the license type covers your job (installation, pumping or inspection) and that the status is active. If the contractor's business name doesn't come up, ask which person on staff holds the license: several states license individuals, not companies.
How many licensed septic contractors are in Connecticut?
The Septic Guide lists 1,925 septic companies and licensed septic professionals in Connecticut, 1,903 of them matched to the Connecticut Department of Public Health / Department of Consumer Protection list (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 Connecticut?
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: Connecticut Department of Public Health (licensing through the state eLicense system); state license lists loaded into The Septic Guide. See how we verify licenses.