Updated
Does Louisiana require a septic license?
Yes. Louisiana requires septic installers to hold a state credential issued by the Louisiana Department of Health, Onsite Wastewater Program. The Louisiana Department of Health publishes its active installer list, which marks installers who can also maintain mechanical (aerobic) plants.
Who licenses septic contractors in Louisiana?
Louisiana Department of Health, Onsite Wastewater Program.
Louisiana's septic credentials:
- Basic installer
- Combination installer
- Maintenance provider
How to check a septic contractor's license in Louisiana
- Open the Louisiana Department of Health, Onsite Wastewater Program 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 Louisiana
A contractor license says who may do septic work; a permit authorizes a specific system. In Louisiana, 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 Louisiana
The Septic Guide lists 348 septic companies and licensed professionals in Louisiana, 333 matched to the state's published list. Source list: LDH active installer list. This is what we could match as of October 2026, not an official count.
- Tangipahoa Parish (18)
- Caddo Parish (15)
- Livingston Parish (15)
- St. Tammany Parish (15)
- Calcasieu Parish (12)
- Lafayette Parish (12)
- Lafourche Parish (12)
- Lincoln Parish (12)
All septic companies in Louisiana →
Louisiana septic licensing: common questions
Do you need a license to install septic systems in Louisiana?
Yes. Louisiana requires septic installers to hold a state credential issued by the Louisiana Department of Health, Onsite Wastewater Program. The Louisiana Department of Health publishes its active installer list, which marks installers who can also maintain mechanical (aerobic) plants.
Who issues septic licenses in Louisiana?
The Louisiana Department of Health, Onsite Wastewater Program issues Louisiana's septic credentials: Basic installer; Combination installer; Maintenance provider.
How do I check a septic contractor's license in Louisiana?
Open the Louisiana Department of Health, Onsite Wastewater Program 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 Louisiana?
The Septic Guide lists 348 septic companies and licensed septic professionals in Louisiana, 333 of them matched to the Louisiana Department of Health 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 Louisiana?
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: Louisiana Department of Health, Onsite Wastewater Program; state license lists loaded into The Septic Guide. See how we verify licenses.