| Company | Location | Certifications | License # |
|---|---|---|---|
| AT Septic Inspection & Design Inc | Rush City, MN | Designer (Advanced)Inspector (Advanced)InstallerPumper | L3886 |
| Bluhm Construction Incorporated | Lindstrom, MN | DesignerInstaller | L313 |
| Bluhm Enterprises LLC | Lindstrom, MN | Designer | L4334 |
| Gustafson Excavating Inc | North Branch, MN | Installer | L1055 |
| J & S Holmquist Inc | Chisago City, MN | Installer | L3009 |
| Leroux Companies LLC | North Branch, MN | Installer | L778 |
| LRS Portables LLC | North Branch, MN | Pumper | L4205 |
| Mell Construction, Inc. | Rush City, MN | InstallerPumper | L626 |
| Mike Armstrong Contracting | Chisago City, MN | Installer | L1348 |
| Muddy Gap Hollow Inc. | Stanchfield, MN | Installer | L3314 |
| Nicholas Construction Inc. | Stanchfield, MN | Installer | L3259 |
| Perry and Sons Excavating Incorporated | Chisago City, MN | Installer | L1273 |
| Peterson Companies Inc | Chisago City, MN | Installer | L2613 |
| R & G Wiener Construction Co | Rush City, MN | Installer | L3322 |
| RE Peterson Inc | Lindstrom, MN | Installer | L3858 |
| Rick Keller Enterprises Inc. | Stacy, MN | DesignerInstaller | L1025 |
| Ronnie Bowman Excavating | Stacy, MN | Installer | L1193 |
| Scandia Contracting and Farming Inc | Scandia, MN | Installer | L2914 |
| Shaun Fiedler | Rush City, MN | DesignerInstaller | L1689 |
| Sunrise Septic Services, Inc | North Branch, MN | Inspector | L2299 |
| T A Schmidt & Sons Excavating Inc | Center City, MN | Installer | L2013 |
| T-Rex Portable Industries LLC | North Branch, MN | Pumper | L4505 |
| Thompsons Sewer Service & Soil Testing Inc | Rush City, MN | Designer (Advanced)Inspector (Advanced)Pumper | L261 |
| Trenchless Pipe Repair LLC | North Branch, MN | Pumper | L3070 |
| Wild River Outdoor Services LLC | North Branch, MN | Installer | L4363 |
| Zierke Soil Testing, LLC | Chisago City, MN | DesignerInspector | L119 |
26 companies in the Minnesota MPCA SSTS licensed business registry are based in Chisago County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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