Direct contact information for St. Tammany Parish and Louisiana state offices that handle septic permits, well registration, and contractor licensing — so you can go straight to the source.
Government office hours, phone lines, fees, and requirements change without notice. Everything below was verified against official sources at time of writing, but before you rely on any of it for a permit deadline, property closing, or licensing decision, confirm current details directly with the agency by phone or on their official website.
Handles the issuance of permits and inspections for on-site wastewater treatment (septic) systems across unincorporated St. Tammany Parish, including the Sewerage Inspection Permit required at property transfer and other triggering events.
The state Health Unit's Sanitarian Services handles individual sewerage system permit applications (Form LHS-47) in coordination with the parish. There are branch offices serving both the Mandeville and Slidell areas.
Licenses septic installers (Basic license), combined installer/maintenance providers (Combination license), and aerobic treatment unit maintenance providers (Maintenance license) statewide, including St. Tammany Parish. Always verify a contractor's license before hiring.
Licenses water well drilling contractors (C-13 license) and maintains the state registry of water wells. New wells must be registered within 30 days of completion. You can also use this office to confirm a driller's license is current.
Guidance for private well owners on testing, maintenance, and interpreting water quality results, plus a directory of LDH-certified testing laboratories.
St. Tammany Parish's on-site sewage regulations (Parish Code, Chapter 214) require septic systems to meet parish and state standards, and give the parish Health Unit authority to require an approved alternative system where a standard septic system isn't feasible for a given lot.
The Sewerage Inspection Permit (SIP) program requires inspection of a property's system before certain actions can proceed — most commonly at the sale or transfer of a property, or before certain electrical service connections. Since June 2023, SIP applications are submitted online through MyGovernmentOnline, with a standard filing fee.
If you're buying or selling a home on septic in St. Tammany Parish, budget time for this step — a required inspection that turns up a problem can affect a closing timeline. If you're not sure whether your property needs one, the Department of Environmental Services (contact above) is the best first call.
Louisiana law requires any septic installation or repair to be performed by an LDH-licensed contractor — this protects you both legally and practically, since unlicensed work can complicate a future sale or inspection.
If you'd rather just talk to someone about your specific situation, we're happy to help you figure out next steps and connect you with the right local professional.
📞 Call (985) 000-0000