2803 S Service Rd W, Ruston, LA 71270 · Lincoln Parish
Is Mark Johnson and Sons Plumbing, Heating and Cooling licensed?
Mark Johnson and Sons Plumbing, Heating and Cooling appears on Louisiana septic license or certification lists. The Septic Guide matched these credentials to the issuing agency's published list as of October 2026; confirm the current status with the agency before you hire.
| Credential | Number | Issued by | Verify |
|---|---|---|---|
| Louisiana LDH Licensed Onsite Wastewater (Septic) Installer (Basic; Combination) | 31795 | Louisiana Department of Health | Agency lookup |
| Louisiana LDH Licensed Onsite Wastewater (Septic) Installer (Basic; Combination) | 40058 | Louisiana Department of Health | Agency lookup |
| Louisiana LDH Licensed Onsite Wastewater (Septic) Installer (Basic; Combination) | 32461 | Louisiana Department of Health | Agency lookup |
| Louisiana LDH Licensed Onsite Wastewater (Septic) Installer (Basic; Combination) | 40088 | Louisiana Department of Health | Agency lookup |
A matched credential shows the holder was on the agency's list when we checked. It does not by itself authorize every kind of septic work: an installer license, a pumper license and an inspector certification are different credentials.
What septic services does Mark Johnson and Sons Plumbing, Heating and Cooling offer?
Found on Mark Johnson and Sons Plumbing, Heating and Cooling's website: Septic inspection.
Implied by its state license: Septic system installation.
Ask Mark Johnson and Sons Plumbing, Heating and Cooling to confirm it handles your specific job and service area. Guides: Septic system installation · Septic inspection.
Before you hire Mark Johnson and Sons Plumbing, Heating and Cooling
- Check the license on the agency lookup above and ask which person holds it.
- Ask who pulls the permit and whether the fee is in the quote.
- Ask for proof of liability insurance sent by the insurer.
- Get the scope and price in writing. How to check a septic license.
Is this your business? Correct or update this listing. Listing data: state license lists and public business information, as of October 2026. Not an endorsement.