Backflow Testing, Certification & Repair in Warren County, NJ — All 22 Municipalities
South Jersey Backflow serves all 22 Warren County municipalities — completing our comprehensive coverage of every municipality in all 21 New Jersey counties — with certified annual backflow preventer testing, repair, and enclosure installation. Warren County encompasses the Delaware Water Gap (one of America’s most spectacular geological formations), the best-preserved 18th-century Moravian community in NJ (Hope Township), the Mars/M&M’s factory in Hackettstown, the Oxford Furnace (est. 1741, supplied iron for the Revolution), the historic county seat of Belvidere, and the rapidly developing suburban communities of Washington Township (home of Hawk Pointe) and Lopatcong Township. Call (856) 291-6809 or contact South Jersey Backflow to schedule service anywhere in Warren County.
Water Authorities Serving Warren County — Who We File With
NJ American Water (Washington System)
NJ American Water’s Washington System serves both Washington Borough and Washington Township (Warren County) from three wells: the Vannatta Street well in Washington Borough and the Dale Avenue and Changewater Road wells in Washington Township. Annual test reports must be submitted to NJAW.CrossConnection@amwater.com or 848-232-8309.
Hackettstown MUA (Warren County Pequest River MUA)
The Hackettstown MUA — drawing from the Pequest River system — is the primary water authority for Hackettstown Town and adjacent portions of Allamuchy Township, Independence Township, and Mansfield Township. Annual test reports are submitted to the Hackettstown MUA.
Municipal Water Departments
Phillipsburg Town (Delaware River source), Town of Belvidere, Alpha Borough, Lopatcong Township, Pohatcong Township, and Oxford Township each operate their own water departments. South Jersey Backflow files directly with each.
Private Wells — Predominant in Rural Warren County
The majority of Warren County’s rural townships — Blairstown, Franklin (Warren), Frelinghuysen, Greenwich (Warren), Hardwick, Harmony, Hope, Knowlton, Liberty, Mansfield (partial), and White — are primarily served by private well systems. For any public water connections in these townships, South Jersey Backflow files with the applicable authority.
Warren County's Key Water and Environmental Assets
Warren County’s extraordinary natural and historical assets create specific backflow compliance contexts:
Delaware Water Gap National Recreation Area: Hardwick, Knowlton, and Blairstown Townships; nationally protected Wild and Scenic Delaware River watershed
Pequest Trout Hatchery (Oxford Township): NJ’s largest state fish hatchery (~600,000 trout/year); institutional water system compliance
Great Meadows wetlands (Oxford, Independence): Ecologically significant freshwater wetlands in the Pequest River watershed
Mars/M&M’s factory (Hackettstown): Food manufacturing cross-connection compliance under NJAW Washington System and Hackettstown MUA protocols
Musconetcong River — National Wild and Scenic: Greenwich Township, Franklin Township (Warren), and the Musconetcong watershed communities
All 22 Warren County Municipalities
Schedule Your Warren County Backflow Service — and Complete New Jersey Coverage
Call (856) 291-6809 or contact South Jersey Backflow. South Jersey Backflow now covers every municipality in all 21 New Jersey counties. Direct filing with NJ American Water Washington System, Hackettstown MUA, Phillipsburg Town, Belvidere, Alpha, Lopatcong, Pohatcong, Oxford, and all Warren County water authorities.