| Company | Location | Certifications | License # |
|---|---|---|---|
| Above Environmental Services Inc | Vernon Twp, NJ | Subsurface Evaluation | US00568 |
| Adr Environmental | Branchville Boro, NJ | ClosureSubsurface Evaluation | US572155 |
| Advanced Pier & Support LLC | Hamburg Boro, NJ | Closure | US922715 |
| Applied Service Corp | Lafayette Twp, NJ | Cathodic Protection SpecialistClosureInstallation-Entire UST SystemSubsurface EvaluationTank Testing | US01006 |
| Ats Environmental Services LLC | Sparta Twp, NJ | Cathodic Protection TesterHHO ClosureInstallation-Entire UST SystemTank Testing | US269276 |
| Core Environmental Services LLC | Newton Town, NJ | ClosureSubsurface Evaluation | US254467 |
| Eco Logic Environmental Testing Inc | Wantage Twp, NJ | ClosureInstallation - RepairInstallation-Entire UST SystemTank Testing | US474579 |
| Jj Rich | Newton Town, NJ | ClosureTank Testing | US448532 |
| Kcr Systems LLC | Vernon Twp, NJ | ClosureSubsurface Evaluation | US270247 |
| Petro Mechanics Inc | Lafayette Twp, NJ | ClosureInstallation-Entire UST System | US00380 |
| Pierson Landscaping and Design LLC | Branchville Boro, NJ | Closure | US746958 |
11 companies in the NJDEP UST certification program are based in Sussex County as of 2026-07-17. Companies based elsewhere in New Jersey also commonly serve the county.
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