Licensed Septic Companies in Delaware County, OK
9 septic companies serve Delaware County, Oklahoma, and 9 of them hold a Oklahoma septic license or certification matched to the Oklahoma Department of Environmental Quality list (data as of October 2026).
Septic services in Delaware County
Guides: Septic system installation · Aerobic septic systems · Installation cost · Pumping cost
9 septic companies in Delaware County
Grove 6
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Cook Excavating
PO Box 452097, Grove, OK 74345
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface) · #544 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation
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Crigers Backhoe and Dozer Service
31551 S 690 Rd, Grove, OK 74344
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface, Aerobic Spray) · #261 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation · Aerobic systems
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Excavation Unlimited LLC
29060 S 647 Pl, Grove, OK 74344
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface) · #1256 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation
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Jarrod Leach
PO Box 451251, Grove, OK 74345
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface, Aerobic Drip) · #1043 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation · Aerobic systems
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Jason D Nelson
PO Box 451006, Grove, OK 74345
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface, Aerobic Spray, Aerobic Drip) · #450 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation · Aerobic systems
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Mitchells Excavating
PO Box 450646, Grove, OK 74345
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface, Lagoon, Aerobic Spray, Aerobic Drip) · #291 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation · Aerobic systems
Colcord 1
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Blackfox Inc
4919 Hwy 412, Colcord, OK 74338
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface, Aerobic Drip) · #592 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation · Aerobic systems
Eucha 1
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Cherokee Nation
855 Markoma Cir, Eucha, OK 74342
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface) · #1210 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation
Kansas 1
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Marc Edelman
53729 S 614 Rd, Kansas, OK 74347
- Licensed: Oklahoma DEQ Certified Septic Installer (Subsurface) · #1137 (Oklahoma Department of Environmental Quality, verify)
Per state license: Installation
No phone on the state list
No listings match those filters.
Septic licensing in Oklahoma
Oklahoma certifies septic installers by system type: subsurface, lagoon, aerobic spray and aerobic drip. The Oklahoma DEQ, Environmental Complaints and Local Services issues these credentials: Certified installer (subsurface, lagoon, aerobic spray, aerobic drip).
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Delaware County and whether the permit fee is in their quote.
Oklahoma septic licensing: agencies, license types and how to check a license →
Septic companies in Delaware County: common questions
How many licensed septic companies are in Delaware County, OK?
9 septic companies serve Delaware County, Oklahoma, and 9 of them hold a Oklahoma septic license or certification matched to the Oklahoma Department of Environmental Quality 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 Oklahoma?
Oklahoma certifies septic installers by system type: subsurface, lagoon, aerobic spray and aerobic drip. The licensing body is the Oklahoma DEQ, Environmental Complaints and Local Services.
Which companies install septic systems in Delaware County?
9 listings in Delaware County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Oklahoma license.
How do I check a septic contractor's license in Oklahoma?
Use the Oklahoma DEQ, Environmental Complaints and Local Services's lookup (https://applications.deq.ok.gov/certinstallers/certinstallers.aspx) and search the contractor's name or license number. Our guide to checking a septic license walks through it.