Tri-County Septic LLC Offers a Full Range of Septic Services, including in-company Excavation Services that save you both time and money by cutting out the need for multiple contractors. From Inspection to Repair and Installation, Tri-County has all of your Septic Needs Covered. With over 30 years of experience serving customers throughout Warren, Hunterdon and Morris Counties, you can rely on Tri-County for reliable and dependable service.