Licensed Septic Companies in Washington County, MS
5 septic companies serve Washington County, Mississippi, and 4 of them hold a Mississippi septic license or certification matched to the Mississippi State Department of Health list (data as of October 2026).
Septic services in Washington County
Guides: Septic system installation · Installation cost · Pumping cost
5 septic companies in Washington County
Leland 3
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All-State Tank Co, Inc
P.O. Box 288, Leland, MS 38756
- Licensed: Mississippi MSDH Certified On-Site Wastewater (Septic) Installer · #MSDH-486 (Mississippi State Department of Health, verify)
Per state license: Installation
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Lee Plumbing Inc.
5281 Black Bayou Road, Leland, MS 38756
- Licensed: Mississippi MSDH Certified On-Site Wastewater (Septic) Installer · #MSDH-6257 (Mississippi State Department of Health, verify)
Per state license: Installation
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All-State Tank Co. Inc.
3952 US-82, Leland, MS 38756
From their website: Installation · Grease traps
Greenville 1
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Alex Smith Backhoe Service
1875 Highway 1 North, Greenville, MS 38703
- Licensed: Mississippi MSDH Certified On-Site Wastewater (Septic) Installer · #MSDH-243 (Mississippi State Department of Health, verify)
Per state license: Installation
Hollandale 1
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Greenville Lawns Inc
4378 Highway 1 South, Hollandale, MS 38748
- Licensed: Mississippi MSDH Certified On-Site Wastewater (Septic) Installer · #MSDH-3237 (Mississippi State Department of Health, verify)
Per state license: Installation
No listings match those filters.
Septic licensing in Mississippi
Mississippi certifies septic installers, pumpers and maintenance providers through the State Department of Health. The Mississippi State Department of Health, On-Site Wastewater issues these credentials: Certified installer; Certified pumper/hauler; Certified maintenance provider.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Washington County and whether the permit fee is in their quote.
Mississippi septic licensing: agencies, license types and how to check a license →
Septic companies in Washington County: common questions
How many licensed septic companies are in Washington County, MS?
5 septic companies serve Washington County, Mississippi, and 4 of them hold a Mississippi septic license or certification matched to the Mississippi State Department of Health list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in Mississippi?
Mississippi certifies septic installers, pumpers and maintenance providers through the State Department of Health. The licensing body is the Mississippi State Department of Health, On-Site Wastewater.
Which companies install septic systems in Washington County?
5 listings in Washington County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Mississippi license.
How do I check a septic contractor's license in Mississippi?
Use the Mississippi State Department of Health, On-Site Wastewater's lookup (https://apps.msdh.ms.gov/wastewater/installersearch.asp) and search the contractor's name or license number. Our guide to checking a septic license walks through it.