Licensed Septic Companies in Williston, ND
39 septic companies serve Williston, North Dakota, and 39 of them hold a North Dakota septic license or certification matched to the North Dakota Department of Environmental Quality / local health districts list (data as of October 2026).
Septic services in Williston
Guides: Septic system installation · Septic inspection · Septic repair · Drain field repair · Installation cost · Pumping cost
39 septic companies in Williston
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701 Scrap LLC
Williston, ND · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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A&M Quality Building & Remodeling, LLC
14763 Mortenson St, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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ACE Waterline Services, LLC
Williston, ND · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Advent Plumbing
13782 Mariouns Ridge Rd, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Agri Industries, Inc. - Williston
PO Box 1166, Williston, ND 58802 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
From their website: Installation · Inspection
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All Source Plumbing
PO Box 10495, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Alpha Septic and Sewer Inc
3202 17th Ave W 501, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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AOK Construction, LLC
Williston, ND · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Black Diamond Solutions
320 8th St W, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Black's Well Service
13669 Redwood Way ND, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Braaten Plumbing
2203 2nd Ave W, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Clark and Sons Earthworks Consulting LLC
4954 148th Ave NW, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Cody Echevarria Construction LLC
PO Box 6105, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Coreys Septic Service
14279 Painted Woods Dr, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Enywhey Services LLC
PO Box 11104, Williston, ND 58803 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Goebel Construction
4320 Main St, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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High Plains Excavating LLC
5471 138th Ave NW, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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High Plains Excavating LLC
5471 138th Ave NW, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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JMAC Resources
121 48th Ave SW, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Joe's Digging Service, Inc.
PO Box 452, Williston, ND 58802 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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JTI Inc
PO Box 1307, Williston, ND 58802 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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KDW Construction
PO Box 2219, Williston, ND 58802 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Kent's Plumbing and Heating LLC
PO Box 834, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Lakeside Builders United, LLC
5492 Sweet Clover Lane, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Lakeside Builders United, LLC
221 University Ave #102, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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MC's Digging Service
Williston, ND · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Peter & Sons Excavation LLC
2007 8th Ave E, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Prairie Winds Services, LLC
4983 Hatzenbiler Ln, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
From their website: Installation · Repair · Drain field
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Scully Design Build, Inc
PO Box 1883, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Spydr Oilfield Service, LLC
5309 Saddle Ridge Cir Unit F, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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SRD Excavation/Utilities Inc
13990 W Front St, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Stateline Services
PO Box 1472, Williston, ND 58802 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Straight Shot Enterprise
5749 143rd Ave NW, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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TERAflex Group, LLC
PO Box 10482, Williston, ND 58803 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Triple I Contracting
5482 Mathew Ave, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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W-5 excavation Inc
6702 Darby Ln., Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
From their website: Installation · Perc testing
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WBP Contracting
3720 Prarie Commons, Williston, ND 58802 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Wiggy's Construction
Williston, ND · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
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Windsong Contracting, LLC
5962 137th Ave NW, Williston, ND 58801 · Williams County
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
No listings match those filters.
Septic licensing in North Dakota
North Dakota began licensing septic installers statewide under 2025 legislation (SB 2267); local public health units administer the program. The North Dakota DEQ and local public health units issues these credentials: Annual septic installer license.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Williston and whether the permit fee is in their quote.
North Dakota septic licensing: agencies, license types and how to check a license →
Septic companies in Williston: common questions
How many licensed septic companies are in Williston, ND?
39 septic companies serve Williston, North Dakota, and 39 of them hold a North Dakota septic license or certification matched to the North Dakota Department of Environmental Quality / local health districts 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 North Dakota?
North Dakota began licensing septic installers statewide under 2025 legislation (SB 2267); local public health units administer the program. The licensing body is the North Dakota DEQ and local public health units.
Which companies install septic systems in Williston?
39 listings in Williston install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their North Dakota license.
How do I check a septic contractor's license in North Dakota?
Use the North Dakota DEQ and local public health units's lookup (https://deq.nd.gov/WQ/) and search the contractor's name or license number. Our guide to checking a septic license walks through it.