St. Mary Parish, LA septic permits and regulations
Septic systems in St. Mary Parish, Louisiana are permitted by St. Mary Parish Health Unit under LAC Title 51, Part XIII.
Septic permit program
- Program type: State Agency
- Authorized agent: St. Mary Parish Office of Public Health
- Own septic program: No, uses Louisiana state rules
- Local rules beyond the state: No
- Population: 49,406
Permit fee comparison
Average septic permit fee in St. Mary Parish: $100. Louisiana average: $104.
Local rules
County operates under state-level LAC 51:XIII (Louisiana Sanitary Code). Contact local health department for any additional county-specific requirements.
What SepticPro has on file for St. Mary Parish
- 1 permit fee with sources
- The agency phone, email and office address
- Setback distances
- Soil and perc test requirements
- Allowed system types
- System design rules
- Inspection requirements
- Maintenance and pumping rules
- Point-of-sale rules
- Installer, designer and pumper licensing
Create a free account to see the full details.
Draw a permit-ready site plan for St. Mary Parish
Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for St. Mary Parish Health Unit. See how SepticPro site plans work.
Other Louisiana counties
- Acadia Parish
- Allen Parish
- Ascension Parish
- Assumption Parish
- Avoyelles Parish
- Beauregard Parish
- Bienville Parish
- Bossier Parish
- Caddo Parish
- Calcasieu Parish
- Caldwell Parish
- Cameron Parish
- Catahoula Parish
- Claiborne Parish
- Concordia Parish
- De Soto Parish
- East Baton Rouge Parish
- East Carroll Parish
- East Feliciana Parish
- Evangeline Parish
- Franklin Parish
- Grant Parish
- Iberia Parish
- Iberville Parish
Data checked 2026-03-16. Always confirm requirements with St. Mary Parish Health Unit before applying.