Licensed Septic Companies in Dunn County, ND
5 septic companies serve Dunn County, North Dakota, and 5 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).
5 septic companies in Dunn County
Killdeer 4
-
John Truchan
569 109th Ave SW, Killdeer, ND 58640
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
-
Killdeer Mountain Contracting
10317 Highway 200, Killdeer, ND 58640
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
-
Toddco
11769 1st St SW, Killdeer, ND 58640
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
-
Tri-County Contracting
11474 1L St NE, Killdeer, ND 58640
- Licensed: North Dakota Licensed Septic Installer (North Dakota Department of Environmental Quality / local health districts, verify)
Per state license: Installation
Dodge 1
-
Voltz Excavating
Dodge, ND
- 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 Dunn County 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 Dunn County: common questions
How many licensed septic companies are in Dunn County, ND?
5 septic companies serve Dunn County, North Dakota, and 5 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 Dunn County?
5 listings in Dunn County 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.