New Jersey water quality
New Jersey has 3,505 active public water systems (14,880 on file total), 618 of them graded by TapGraded.
Grade distribution
Biggest water systems
VEOLIA WATER NEW JERSEY HACKENSACK
HAWORTH, NJ · 792,713 served
NJ AMERICAN WATER - RARITAN
BRTIDGEWATER, NJ · 615,430 served
NJ AMERICAN WATER - COASTAL NORTH
COLTS NECK, NJ · 377,613 served
PASSAIC VALLEY WATER COMMISSION
CLIFTON, NJ · 310,483 served
NEWARK WATER DEPARTMENT
NEWARK, NJ · 294,274 served
NJ AMERICAN WATER - WESTERN
DELRAN, NJ · 274,291 served
JERSEY CITY MUA
JERSEY CITY, NJ · 262,000 served
MIDDLESEX WATER COMPANY
ISELIN, NJ · 233,376 served
WILDWOOD CITY WATER DEPARTMENT
RIO GRANDE, NJ · 218,472 served
NJ AMERICAN WATER - SHORT HILLS
SHORT HILLS, NJ · 217,230 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
LINCOLN PARK WATER DEPT
LINCOLN PARK, NJ · 11,000 served
MANCHESTER UTILITIES AUTHORITY
WOODLAND PARK, NJ · 12,000 served
SOUTH RIVER W DEPT
SOUTH RIVER, NJ · 16,000 served
WANAQUE W DEPT.
WANAQUE, NJ · 10,266 served
SPARTA TWP WATER UTILITY - LAKE MOHAWK
SPARTA, NJ · 17,625 served
WEST CALDWELL WATER DEPARTMENT
WEST CALDWELL, NJ · 10,759 served
PERTH AMBOY WATER DEPARTMENT
ISELIN, NJ · 52,328 served
FAIR LAWN WATER DEPT
FAIR LAWN BORO, NJ · 35,564 served
CEDAR GROVE WATER DEPT
CEDAR GROVE, NJ · 12,900 served
MONTVILLE TWP MUA
MONTVILLE, NJ · 22,000 served
Cities in New Jersey
Source: EPA SDWIS/ECHO · Data as of 2026Q2