Septic permits & rules in Warren County: The Warren County Health Department reviews plans for proposed septic system installations, physically inspects installations, and responds to complaints about malfunctioning systems. Homeowners can also look up existing records through the county's searchable online Septic System and Private Well database. Details: Warren County Health Department.
| Company | Location | Certifications | License # |
|---|---|---|---|
| Flow Free Septic Service LLC | Blairstown, NJ | septage-haulinggrease-trap-waste | — |
| Kleiza Enterprises, Inc. | Hackettstown, NJ | septage-haulinggrease-trap-waste | — |
| Richard Cowell Septic Service | Blairstown, NJ | — |
3 companies in the NJDEP registered septage haulers list are based in Warren County as of 2026-07-17. Companies based elsewhere in New Jersey also commonly serve the county.
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