2026 Rankings

Worst ZIP Codes for Lead in Water in New Jersey — 2026

Last updated: June 4, 2026

472 ZIP codes ranked by Lead (mg/L) #1: ZIP 07962 (Morristown, NJ) — 32.1 ppb
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

Out of 472 ZIP codes with data in New Jersey, these are the highest-ranked areas for lead (mg/l). See also: National Worst ZIP Codes for Lead in Water | All New Jersey Rankings

Statistic Value
ZIP codes ranked 472
Highest value 32.1 ppb
Median value 2.9 ppb
State New Jersey

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (mg/L) Safety Score
1 07962 Morristown NJ 32.1 ppb 25/100
2 07963 Morristown NJ 32.1 ppb 25/100
3 07438 Oak Ridge NJ 23.0 ppb 49/100
4 07863 Oxford NJ 19.9 ppb 34/100
5 08723 Brick NJ 14.8 ppb 49/100
6 08724 Brick NJ 14.8 ppb 54/100
7 07016 Cranford NJ 13.9 ppb 41/100
8 07848 Lafayette NJ 13.6 ppb 40/100
9 07834 Denville NJ 12.7 ppb 36/100
10 07850 Landing NJ 12.0 ppb 43/100
11 08204 Cape May NJ 10.5 ppb 73/100
12 07902 Summit NJ 9.6 ppb 67/100
13 07856 Mount Arlington NJ 8.6 ppb 47/100
14 07463 Waldwick NJ 8.5 ppb 64/100
15 07430 Mahwah NJ 7.7 ppb 64/100
16 07495 Mahwah NJ 7.7 ppb 78/100
17 07843 Hopatcong NJ 7.5 ppb 53/100
18 08051 Mantua NJ 7.1 ppb 54/100
19 07010 Cliffside Park NJ 7.1 ppb 63/100
20 07020 Edgewater NJ 7.1 ppb 50/100
21 07022 Fairview NJ 7.1 ppb 55/100
22 07024 Fort Lee NJ 7.1 ppb 55/100
23 07047 North Bergen NJ 7.1 ppb 50/100
24 07070 Rutherford NJ 7.1 ppb 45/100
25 07072 Carlstadt NJ 7.1 ppb 45/100
26 07073 East Rutherford NJ 7.1 ppb 45/100
27 07074 Moonachie NJ 7.1 ppb 45/100
28 07075 Wood Ridge NJ 7.1 ppb 50/100
29 07086 Weehawken NJ 7.1 ppb 50/100
30 07093 Monitor NJ 7.1 ppb 55/100
31 07094 Secaucus NJ 7.1 ppb 45/100
32 07458 Saddle River NJ 7.1 ppb 50/100
33 07601 Hackensack NJ 7.1 ppb 45/100
34 07603 Bogota NJ 7.1 ppb 55/100
35 07604 Hasbrouck Heights NJ 7.1 ppb 55/100
36 07605 Leonia NJ 7.1 ppb 55/100
37 07606 South Hackensack NJ 7.1 ppb 50/100
38 07607 Maywood NJ 7.1 ppb 55/100
39 07608 Teterboro NJ 7.1 ppb 63/100
40 07620 Alpine NJ 7.1 ppb 63/100
41 07621 Bergenfield NJ 7.1 ppb 50/100
42 07624 Closter NJ 7.1 ppb 55/100
43 07626 Cresskill NJ 7.1 ppb 50/100
44 07627 Demarest NJ 7.1 ppb 55/100
45 07628 Dumont NJ 7.1 ppb 50/100
46 07630 Emerson NJ 7.1 ppb 55/100
47 07631 Englewood NJ 7.1 ppb 45/100
48 07632 Englewood Cliffs NJ 7.1 ppb 63/100
49 07640 Harrington Park NJ 7.1 ppb 55/100
50 07641 Haworth NJ 7.1 ppb 67/100
51 07642 Hillsdale NJ 7.1 ppb 45/100
52 07643 Little Ferry NJ 7.1 ppb 40/100
53 07646 New Milford NJ 7.1 ppb 45/100
54 07647 Northvale NJ 7.1 ppb 50/100
55 07648 Norwood NJ 7.1 ppb 55/100
56 07649 Oradell NJ 7.1 ppb 55/100
57 07650 Palisades Park NJ 7.1 ppb 55/100
58 07652 Paramus NJ 7.1 ppb 50/100
59 07657 Ridgefield NJ 7.1 ppb 50/100
60 07660 Ridgefield Park NJ 7.1 ppb 45/100
61 07661 River Edge NJ 7.1 ppb 50/100
62 07662 Rochelle Park NJ 7.1 ppb 45/100
63 07666 Teaneck NJ 7.1 ppb 50/100
64 07670 Tenafly NJ 7.1 ppb 50/100
65 07675 Westwood NJ 7.1 ppb 45/100
66 07676 Township Of Washington NJ 7.1 ppb 55/100
67 07821 Andover NJ 7.0 ppb 61/100
68 08067 Pedricktown NJ 6.9 ppb 76/100
69 07039 Livingston NJ 6.4 ppb 54/100
70 07936 East Hanover NJ 6.4 ppb 50/100
71 07435 Newfoundland NJ 6.2 ppb 49/100
72 08403 Longport NJ 6.2 ppb 72/100
73 08740 Ocean Gate NJ 6.0 ppb 78/100
74 07874 Stanhope NJ 5.9 ppb 50/100
75 07461 Sussex NJ 5.8 ppb 48/100
76 07030 Hoboken NJ 5.5 ppb 61/100
77 08240 Pomona NJ 5.3 ppb 82/100
78 07803 Mine Hill NJ 4.8 ppb 57/100
79 07885 Wharton NJ 4.8 ppb 65/100
80 07444 Pompton Plains NJ 4.8 ppb 42/100
81 07034 Lake Hiawatha NJ 4.7 ppb 35/100
82 07045 Montville NJ 4.7 ppb 56/100
83 07058 Pine Brook NJ 4.7 ppb 40/100
84 07082 Towaco NJ 4.7 ppb 53/100
85 07801 Dover NJ 4.6 ppb 47/100
86 07802 Dover NJ 4.6 ppb 62/100
87 07806 Picatinny Arsenal NJ 4.6 ppb 40/100
88 07869 Randolph NJ 4.6 ppb 45/100
89 07999 Whippany NJ 4.6 ppb 40/100
90 08809 Clinton NJ 4.6 ppb 46/100
91 08318 Elmer NJ 4.6 ppb 69/100
92 07446 Ramsey NJ 4.6 ppb 64/100
93 07032 Kearny NJ 4.5 ppb 64/100
94 08212 Cape May Point NJ 4.4 ppb 84/100
95 08070 Pennsville NJ 4.3 ppb 66/100
96 08501 Allentown NJ 4.3 ppb 53/100
97 08510 Millstone Township NJ 4.3 ppb 53/100
98 08520 Hightstown NJ 4.3 ppb 45/100
99 08535 Millstone Township NJ 4.3 ppb 53/100
100 08541 Princeton NJ 4.3 ppb 40/100

Methodology

Lead rankings are based on the 90th percentile lead testing value (PB90) reported by water systems under the Lead and Copper Rule. When CCR data is unavailable, EPA SDWIS lead sampling data is used. The EPA action level for lead is 15 ppb (0.015 mg/L). There is no safe level of lead exposure.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-06-04.

Frequently Asked Questions

What is a dangerous lead level in water?

The EPA action level is 15 parts per billion (ppb). The American Academy of Pediatrics recommends no more than 1 ppb for school drinking water. There is no safe level of lead exposure for children.

How is lead measured in water?

Water systems collect samples from homes with known lead service lines or lead solder. The 90th percentile value (PB90) means 90% of samples tested below that level. If PB90 exceeds 15 ppb, the system must take corrective action.

Explore More Rankings

How this ranking is calculated, data sources, and limitations: Rankings Methodology →

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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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