Environmental compliance · county

Environmental compliance in Mercer County

1,136 active EPA-regulated sites in Mercer County, New Jersey: 165 with an identified violation, 23 in significant violation, 471 inspections and $6.7 million in penalties over five years — EPA ECHO, as of October 18, 2026.

Cite: FACTANKER, https://factanker.com/us/nj/mercer-county/environmental-compliance

How many facilities in Mercer County, New Jersey are regulated by the EPA, and how many are in violation (as of October 18, 2026)?

Measure	Value
Active EPA-regulated sites	1,136
Sites with an identified violation	165
Sites in significant violation	23
Inspections and evaluations, last 5 years	471
Formal enforcement actions, last 5 years	109
Penalties, last 5 years (shared federal cases once)	$6.7 million

How many active facilities in Mercer County, New Jersey fall under each EPA program?

A facility can be in several programs.

Program	Active sites
Air (Clean Air Act)	222
Water discharge permits (Clean Water Act, NPDES)	507
Hazardous waste (RCRA)	485
Drinking water systems (SDWA)	115
Toxics Release Inventory reporters	8
Greenhouse gas reporters (GHGRP)	4

Which large facilities in Mercer County, New Jersey does the EPA track, and are they in violation?

Facility	Compliance status	Quarters in violation (of 12)	Penalties, 5 years
E R SQUIBB & SONS LLC Princeton, NJ	Significant Violation	12	–
HAMILTON TWP DEPT WATER POLLUTION CONTROL Hamilton, NJ	Significant Violation	12	$155,650
TRENTON CITY DPW SEWER AUTH Trenton, NJ	Significant Violation	12	–
BRISTOL-MYERS SQUIBB COMPANY Pennington, NJ	Violation Identified	12	$9,600
CARTER RD OFFICE AND RESEARCH CONDO ASSOC Hopewell Twp, NJ	Violation Identified	12	$13,401
EAST WINDSOR WATER POLLUTION CONTROL PLANT East Windsor, NJ	Violation Identified	12	–
PSEG FOSSIL MERCER GENERATING STATION Hamilton, NJ	Violation Identified	12	–
RIVER ROAD PLANT CHLORINATION AND DE-CHLORINATION Princeton, NJ	Violation Identified	12	$459,375
PRINCETON UNIVERSITY COGENERATION Princeton, NJ	Violation Identified	4	$15,600
HIGHTSTOWN BORO AWWTP Hightstown, NJ	Violation Identified	3	–
NJDHS TRENTON PSYCHIATRIC HOSPITAL Trenton, NJ	No Violation Identified	3	$67,100
COLLEGE OF NJ Ewing, NJ	No Violation Identified	2	$3,200
B-WAY PACKAGING INC Trenton, NJ	No Violation Identified	1	$11,320
CONGOLEUM CORP/AMER BILTRITE Trenton, NJ	No Violation Identified	1	$4,000
HOMASOTE CO PAPER PRODUCTS Trenton, NJ	No Violation Identified	1	$3,700
TRAINING FACILITY 1 Trenton, NJ	No Violation Identified	1	–
AMERICAN STANDARD, INC. Trenton, NJ	No Violation Identified	0	–
CAPITAL HEATH SYSTEMS AT FULD CAMPUS Trenton, NJ	No Violation Identified	0	–
GENERAL MOTORS CORP DELPHI INTER LIGHT SYSTM Trenton, NJ	No Violation Identified	0	–
PRINCETON LAND LLC Princeton Junction, NJ	No Violation Identified	0	–
THE LAWRENCEVILLE SCHOOL Lawrenceville, NJ	No Violation Identified	0	–
TRANE U.S. INC. Trenton, NJ	No Violation Identified	0	$1,000
VEOLIA ENERGY TRENTON L.P. Trenton, NJ	No Violation Identified	0	–

All figures for Mercer County · New Jersey · United States

EPA Enforcement and Compliance History Online (ECHO), weekly national export. Counts cover active sites in the Facility Registry Service; inspections, formal actions and penalties cover the last five years, quarters in violation the last three years. The EPA attributes a case that covers several facilities to each of them; area penalty totals here count an amount shared through the same federal case once, facility figures show the amount attributed to that facility. Large facilities are Clean Air Act majors, Clean Water Act majors and large hazardous waste generators or handlers. Source record.

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