Water Quality in Iselin, NJ (08540)
EPA violation data for public water systems serving ZIP code 08540.
Active Health Violations
16 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 99% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
50,388
Population
67
Water Systems
315
Violations (5yr)
16
Health-Based
Location
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Water Systems Serving This Area (67)
Middlesex Water Company
All resolved Surface water 233,376 people served
3 violations (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Nj American Water - Short Hills
Surface water 217,230 people served
0 violations
Lead tested: 3 ppb (limit: 15 ppb) ✓
Trenton Water Works
3 health-based Surface water 217,000 people served
65 violations (5yr)
· 3 health-based · All resolved
Lead tested: 4 ppb (limit: 15 ppb) ✓
Old Bridge Mua
Purchased surface water 68,000 people served
4 violations (5yr)
Lead tested: 1.02 ppb (limit: 15 ppb) ✓
Franklin Township Dept Of Public Works
1 health-based Purchased surface water 57,150 people served
14 violations (5yr)
· 1 health-based
Lead tested: 1.3 ppb (limit: 15 ppb) ✓
New Brunswick W Dept
All resolved Surface water 55,000 people served
18 violations (5yr)
· All resolved
Lead tested: 2.1 ppb (limit: 15 ppb) ✓
Perth Amboy Water Department
1 health-based Groundwater under influence of surface water 52,328 people served
5 violations (5yr)
· 1 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
East Brunswick Water Utility
1 health-based Purchased surface water 48,474 people served
6 violations (5yr)
· 1 health-based · All resolved
Lead tested: 0.13 ppb (limit: 15 ppb) ✓
South Brunswick Twp W Di
1 health-based Purchased surface water 45,450 people served
3 violations (5yr)
· 1 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Sayreville W Dept
All resolved Groundwater under influence of surface water 45,345 people served
5 violations (5yr)
· All resolved
Lead tested: 0.67 ppb (limit: 15 ppb) ✓
Aqua Nj - Hamilton Square
Purchased surface water 39,128 people served
16 violations (5yr)
Rca David Sarnoff Research Cen
Groundwater 1,250 people served
0 violations
Princeton Univ Plasma Ph
Groundwater 1,100 people served
0 violations
Kingston W Co
Groundwater 1,056 people served
0 violations
Terhune Orchards
All resolved Groundwater 1,025 people served
17 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Rca Astro-Electronics Division
Groundwater 850 people served
0 violations
Norwood Manor Rest Home
Groundwater 725 people served
0 violations
American Cyanamid Company
Groundwater 600 people served
0 violations
Dup Takajo
Groundwater 500 people served
0 violations
Dup Takajo
Groundwater 500 people served
0 violations
Sri International
1 health-based Groundwater 450 people served
25 violations (5yr)
· 1 health-based · All resolved
Lead tested: 7.64 ppb (limit: 15 ppb) ✓
Princeton Mont Soc Inc
Groundwater 355 people served
0 violations
Holiday Inn Motor Lodge
Groundwater 325 people served
0 violations
Waldorf School Of Princeton
All resolved Groundwater 300 people served
1 violation (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Wings Asian Fusion Bistro
1 health-based Groundwater 258 people served
1 violation (5yr)
· 1 health-based · All resolved
Princeton Presbyterian Church
Groundwater 186 people served
0 violations
Princeton Arms Strip Stop
Groundwater 128 people served
0 violations
Shell Chemical Co
Groundwater 120 people served
0 violations
Princeton Child Developmnt Ins
All resolved Groundwater 110 people served
2 violations (5yr)
· All resolved
Bridgeton Gulf
All resolved Groundwater 104 people served
7 violations (5yr)
· All resolved
Js Paluch Co Inc
Groundwater 100 people served
0 violations
Eden Institute Fndation
Groundwater 100 people served
0 violations
Rogapekij Day Camp
Groundwater 95 people served
0 violations
Princeton Technology Ctr
1 health-based Groundwater 80 people served
9 violations (5yr)
· 1 health-based
Lead tested: 7.84 ppb (limit: 15 ppb) ✓
Mother Of God Church
Groundwater 70 people served
0 violations
Bell Atlantic/West Winds
Groundwater 65 people served
0 violations
Eden Autism Clayton Center
4 health-based Groundwater 60 people served
68 violations (5yr)
· 4 health-based
Lead tested: 2.17 ppb (limit: 15 ppb) ✓
Porter Matthews Scientific Co
Groundwater 53 people served
0 violations
Trans Continental Gas Pipe
Groundwater 50 people served
0 violations
Princeton Friends School
Groundwater 50 people served
0 violations
Sedgwick Printout Systems Inc
Groundwater 50 people served
0 violations
Sedgewick Printout Systems
Groundwater 50 people served
0 violations
Brunswick Rubber Co Inc
Groundwater 45 people served
0 violations
Bunker Hill Environmental Education Cent
Groundwater 42 people served
0 violations
Cherry Valley Co-Op
Groundwater 42 people served
0 violations
Dennison Manufacturing Co
Groundwater 40 people served
0 violations
Griggstown Volunteer Fire Company
1 health-based Groundwater 40 people served
9 violations (5yr)
· 1 health-based
Bunker Hill Lutheran Church
Groundwater 39 people served
0 violations
Apple Montessori School
Groundwater 35 people served
24 violations (5yr)
Lead tested: 3.2 ppb (limit: 15 ppb) ✓
2490 Professional Center
Groundwater 35 people served
0 violations
I E Shaffer
Groundwater 35 people served
0 violations
Shady Rest Home
Groundwater 31 people served
0 violations
Griggstown Reformed Church
All resolved Groundwater 31 people served
4 violations (5yr)
· All resolved
Hoppock Lot Well
1 health-based Groundwater 30 people served
9 violations (5yr)
· 1 health-based · All resolved
Bykenhulle House
Groundwater 30 people served
0 violations
Transcontinental Gas Pipeline
Groundwater 28 people served
0 violations
Permuttit Research Center
Groundwater 25 people served
0 violations
Solar Motel
Groundwater 25 people served
0 violations
Little Red School
Groundwater 25 people served
0 violations
Shipetaukin Camp
Groundwater 25 people served
0 violations
T/A Princeton Summer Camp
Groundwater 25 people served
0 violations
Hightstown-Ewindsor Day Care C
Groundwater 25 people served
0 violations
Griggstown Muletenders Barracks
Groundwater 25 people served
0 violations
Chapin Mercer & Princeton Line
Groundwater 25 people served
0 violations
T/A Wildcat Mt Wilderness Cent
Groundwater 25 people served
0 violations
General Devices Inc
Groundwater 25 people served
0 violations
Butlers American & Tire Center
Groundwater 25 people served
0 violations
Contaminants Found
Lead and Copper RuleHealth-Based
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
67 violations
Has active
Revised Total Coliform RuleHealth-Based
Missed testing deadlines — not a detection of bacteria.
48 violations
Has active
TTHMHealth-Based
5 violations
All resolved
Interim Enhanced Surface Water Treatment RuleHealth-Based
4 violations
All resolved
Gross Alpha, Excl. Radon and UHealth-Based
3 violations
All resolved
Surface Water Treatment RuleMonitoring
15 violations
All resolved
NitrateMonitoring
At high levels, nitrate can cause blue baby syndrome in infants.
11 violations
All resolved
Public NoticeMonitoring
5 violations
Has active
TolueneMonitoring
5 violations
All resolved
TrichloroethyleneMonitoring
5 violations
All resolved
Vinyl chlorideMonitoring
5 violations
All resolved
Xylenes, TotalMonitoring
5 violations
All resolved
p-DichlorobenzeneMonitoring
5 violations
All resolved
StyreneMonitoring
5 violations
All resolved
TetrachloroethyleneMonitoring
5 violations
All resolved
DICHLOROMETHANEMonitoring
5 violations
All resolved
1,2-DichloropropaneMonitoring
5 violations
All resolved
1,1-DichloroethyleneMonitoring
5 violations
All resolved
trans-1,2-DichloroethyleneMonitoring
5 violations
All resolved
EthylbenzeneMonitoring
5 violations
All resolved
Carbon tetrachlorideMonitoring
5 violations
All resolved
1,1,2-TrichloroethaneMonitoring
5 violations
All resolved
o-DichlorobenzeneMonitoring
5 violations
All resolved
1,1,1-TrichloroethaneMonitoring
5 violations
All resolved
1,2,4-TrichlorobenzeneMonitoring
5 violations
All resolved
CHLOROBENZENEMonitoring
5 violations
All resolved
1,2-DichloroethaneMonitoring
5 violations
All resolved
BenzeneMonitoring
5 violations
All resolved
cis-1,2-DichloroethyleneMonitoring
5 violations
All resolved
ETHYLENE DIBROMIDEMonitoring
5 violations
All resolved
1,2-DIBROMO-3-CHLOROPROPANEMonitoring
5 violations
All resolved
Total Haloacetic Acids (HAA5)Monitoring
3 violations
All resolved
Consumer Confidence RuleMonitoring
Annual water quality report delivery requirement.
3 violations
All resolved
E. COLIMonitoring
3 violations
Has active
2,4-DMonitoring
3 violations
All resolved
Combined Radium (-226 and -228)Monitoring
3 violations
All resolved
Radium-226Monitoring
3 violations
All resolved
Radium-228Monitoring
3 violations
All resolved
ArsenicMonitoring
A naturally occurring element that can cause cancer and other health effects at high levels.
3 violations
All resolved
ChlorineMonitoring
Used to disinfect water — generally safe at regulated levels.
2 violations
All resolved
CYANIDEMonitoring
2 violations
All resolved
Combined UraniumMonitoring
2 violations
All resolved
Antimony, TotalMonitoring
1 violation
All resolved
CadmiumMonitoring
1 violation
All resolved
Beryllium, TotalMonitoring
1 violation
All resolved
MercuryMonitoring
1 violation
All resolved
SeleniumMonitoring
1 violation
All resolved
FluorideMonitoring
1 violation
All resolved
NickelMonitoring
1 violation
All resolved
Thallium, TotalMonitoring
1 violation
All resolved
ChromiumMonitoring
1 violation
All resolved
BariumMonitoring
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit1 ppb measured
Action level: 15 ppb
Sampled: Jul 2025
How Does This Compare?
Iselin (08540) has more violations than 99% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 315.
Fewer violations 99th percentile More violations
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.