Mercer County, New Jersey Water Systems

Mercer County, New Jersey

18 community water systems on record — 11 active, 7 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace New Jersey’s official records. Always confirm current status with New Jersey before making decisions based on this information.

Community water systems in Mercer County, New Jersey

System name	City	Population served	Status
ANTHONY FERRANTE & SONS	OXFORD	272	Inactive
AQUA NJ - HAMILTON SQUARE	HAMILTON	39,128	Active
AQUA NJ - LAWRENCE	HAMILTON	8,655	Active
DIAMOND HILL WATER CO INC	HACKETTSTOWN	800	Inactive
EAST WINDSOR MUA	EAST WINDSOR TOWNSHIP	25,000	Active
GARDEN STATE W CO STEWAR	GREENWICH TWP	500	Inactive
HIGHTSTOWN WATER DEPARTMENT	HIGHSTOWN	5,400	Active
HOPEWELL BORO W DEPT	HOPEWELL	2,035	Active
HOUSE OF THE GOOD SHEPHERD	HACKETTSTOWN	140	Inactive
LAWRENCEVILLE SCHOOL	LAWRENCEVILLE	1,200	Active
MERCER COUNTY CORRECTIONAL CENTER	LAMBERTVILLE	860	Active
NJ AMERICAN W CO OXFORD SYS	WASHINGTON	435	Inactive
PENNINGTON W DEPT	PENNINGTON	2,600	Active
ROBBINSVILLE TWP - NEWTOWN VILLAGE	ROBBINSVILLE	300	Active
STATE TRAILER SERVICE AN	FRANKLIN TWP	100	Inactive
TAMARACK ROAD MHP	RUTHERFORD	25	Inactive
TRENTON WATER WORKS	TRENTON	217,000	Active
WASHINGTON CROSSING PARK ESTATES	TITUSVILLE	356	Active