Backflow Testing, Certification & Repair in Mercer County, NJ — All 13 Municipalities
South Jersey Backflow serves all 13 Mercer County municipalities with certified annual backflow preventer testing, repair, and enclosure installation. Mercer County encompasses New Jersey’s capital city (Trenton), one of the world’s great universities (Princeton), major suburban communities (Hamilton, Ewing, Lawrence, Robbinsville), and the extraordinary Delaware River waterfront that has defined the county’s identity since the Revolutionary War. The primary water authority for Mercer County is Trenton Water Works (TWW) — one of the oldest continuously operated water utilities in the United States, serving more than 225,000 customers across Mercer County from the Delaware River. Call (856) 291-6809 or contact South Jersey Backflow to schedule service anywhere in Mercer County.
Water Authorities Serving Mercer County — Who We File With
Trenton Water Works (TWW)
Trenton Water Works — drawing from the Delaware River at Trenton’s intakes, treating water at one of New Jersey’s oldest water treatment facilities (200+ years of continuous operation), and distributing to 683 miles of water mains serving approximately 225,000 customers — is the dominant water authority for Mercer County. TWW directly serves Trenton City and wholesale customers including Hamilton Township, Ewing Township, Robbinsville, and others. TWW operates under NJDEP oversight and enforces cross-connection control under N.J.A.C. 7:14B. Annual backflow test reports for TWW customers must be submitted to Trenton Water Works. South Jersey Backflow maintains current TWW cross-connection filing protocols.
NJ American Water (Raritan System)
NJ American Water’s Raritan system serves Lawrence Township, West Windsor Township, East Windsor Township, Hopewell Township, Hopewell Borough, Pennington Borough, and portions of other Mercer County municipalities. Annual test reports must be submitted to NJAW.CrossConnection@amwater.com or 848-232-8309.
Princeton Public Utilities
Princeton operates its own Public Utilities Department providing water service to Princeton’s residential and commercial properties. The Princeton water system enforces cross-connection control under N.J.A.C. 7:14B. South Jersey Backflow files directly with Princeton Public Utilities.
Aqua NJ
Aqua NJ serves portions of Mercer County, particularly in some East Windsor and Robbinsville areas. South Jersey Backflow identifies the applicable authority for each Mercer County address.
Hopewell Township Utility Department
Hopewell Township operates its own water utility for portions of the township including the Washington Crossing Estates service area (approximately 105 customers, 2 wells). Annual test reports for Hopewell Township utility customers are submitted directly to the township.
Our Backflow Services Throughout Mercer County
Annual testing and certification: backflow testing and certification with direct TWW, NJAW, Princeton, and Aqua NJ filing
Repair and rebuild: backflow repair and rebuild for all 13 Mercer County municipalities
Princeton University and institutional compliance: Comprehensive programs for Princeton’s research facilities, laboratory water systems, and campus infrastructure
State government facilities: Compliance programs for Trenton’s state government buildings and the State House complex
Restaurant and food service: restaurant backflow requirements — for Mercer County’s diverse commercial corridors
Medical facilities: medical and dental office backflow requirements — Capital Health System, St. Francis Medical Center, and other Mercer County healthcare facilities
Schedule Your Mercer County Backflow Service
Call (856) 291-6809 or contact South Jersey Backflow. Serving all 13 Mercer County municipalities since 2004. Direct filing with Trenton Water Works, NJ American Water Raritan system, Princeton Public Utilities, Aqua NJ, and Hopewell Township Utility Department.
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