2026 Rankings

Highest Radon Risk ZIP Codes in New Jersey — 2026

Last updated: June 4, 2026

246 ZIP codes ranked by Radon Zone #1: ZIP 07962 (Morristown, NJ) — Zone 1 (High)
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 246 ZIP codes with data in New Jersey, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes with Highest Radon Risk | All New Jersey Rankings

Statistic Value
ZIP codes ranked 246
Lowest value Zone 1 (High)
Median value Zone 1 (High)
State New Jersey

100 Lowest-Ranked ZIP Codes

Rank ZIP Code City State Radon Zone Safety Score
1 07962 Morristown NJ Zone 1 (High) 25/100
2 07963 Morristown NJ Zone 1 (High) 25/100
3 07960 Morristown NJ Zone 1 (High) 27/100
4 07440 Pequannock NJ Zone 1 (High) 30/100
5 07740 Long Branch NJ Zone 1 (High) 30/100
6 07750 Monmouth Beach NJ Zone 1 (High) 30/100
7 07760 Rumson NJ Zone 1 (High) 30/100
8 08736 Manasquan NJ Zone 1 (High) 30/100
9 08742 Point Pleasant Beach NJ Zone 1 (High) 30/100
10 08835 Manville NJ Zone 1 (High) 30/100
11 08846 Middlesex NJ Zone 1 (High) 30/100
12 07863 Oxford NJ Zone 1 (High) 34/100
13 07034 Lake Hiawatha NJ Zone 1 (High) 35/100
14 07076 Scotch Plains NJ Zone 1 (High) 35/100
15 07203 Roselle NJ Zone 1 (High) 35/100
16 07717 Avon By The Sea NJ Zone 1 (High) 35/100
17 07718 Belford NJ Zone 1 (High) 35/100
18 07739 Little Silver NJ Zone 1 (High) 35/100
19 07748 Middletown NJ Zone 1 (High) 35/100
20 07753 Neptune NJ Zone 1 (High) 35/100
21 07757 Oceanport NJ Zone 1 (High) 35/100
22 07758 Port Monmouth NJ Zone 1 (High) 35/100
23 07762 Spring Lake NJ Zone 1 (High) 35/100
24 07823 Belvidere NJ Zone 1 (High) 35/100
25 07830 Califon NJ Zone 1 (High) 35/100
26 07849 Lake Hopatcong NJ Zone 1 (High) 35/100
27 08807 Bridgewater NJ Zone 1 (High) 35/100
28 08812 Dunellen NJ Zone 1 (High) 35/100
29 08844 Hillsborough NJ Zone 1 (High) 35/100
30 08876 Somerville NJ Zone 1 (High) 35/100
31 07035 Lincoln Park NJ Zone 1 (High) 36/100
32 07732 Highlands NJ Zone 1 (High) 36/100
33 07834 Denville NJ Zone 1 (High) 36/100
34 07027 Garwood NJ Zone 1 (High) 40/100
35 07033 Kenilworth NJ Zone 1 (High) 40/100
36 07058 Pine Brook NJ Zone 1 (High) 40/100
37 07059 Warren NJ Zone 1 (High) 40/100
38 07090 Westfield NJ Zone 1 (High) 40/100
39 07091 Westfield NJ Zone 1 (High) 40/100
40 07204 Roselle Park NJ Zone 1 (High) 40/100
41 07403 Bloomingdale NJ Zone 1 (High) 40/100
42 07701 Red Bank NJ Zone 1 (High) 40/100
43 07703 Fort Monmouth NJ Zone 1 (High) 40/100
44 07710 Adelphia NJ Zone 1 (High) 40/100
45 07711 Allenhurst NJ Zone 1 (High) 40/100
46 07712 Asbury Park NJ Zone 1 (High) 40/100
47 07720 Bradley Beach NJ Zone 1 (High) 40/100
48 07723 Deal NJ Zone 1 (High) 40/100
49 07730 Hazlet NJ Zone 1 (High) 40/100
50 07737 Leonardo NJ Zone 1 (High) 40/100
51 07755 Oakhurst NJ Zone 1 (High) 40/100
52 07756 Ocean Grove NJ Zone 1 (High) 40/100
53 07765 Wickatunk NJ Zone 1 (High) 40/100
54 07799 Eatontown NJ Zone 1 (High) 40/100
55 07806 Picatinny Arsenal NJ Zone 1 (High) 40/100
56 07825 Blairstown NJ Zone 1 (High) 40/100
57 07836 Flanders NJ Zone 1 (High) 40/100
58 07842 Hibernia NJ Zone 1 (High) 40/100
59 07846 Johnsonburg NJ Zone 1 (High) 40/100
60 07847 Kenvil NJ Zone 1 (High) 40/100
61 07848 Lafayette NJ Zone 1 (High) 40/100
62 07878 Mount Tabor NJ Zone 1 (High) 40/100
63 07880 Vienna NJ Zone 1 (High) 40/100
64 07978 Pluckemin NJ Zone 1 (High) 40/100
65 07981 Whippany NJ Zone 1 (High) 40/100
66 07999 Whippany NJ Zone 1 (High) 40/100
67 08504 Blawenburg NJ Zone 1 (High) 40/100
68 08541 Princeton NJ Zone 1 (High) 40/100
69 08558 Skillman NJ Zone 1 (High) 40/100
70 08640 Fort Dix NJ Zone 1 (High) 40/100
71 08648 Lawrence Township NJ Zone 1 (High) 40/100
72 08720 Allenwood NJ Zone 1 (High) 40/100
73 08750 Sea Girt NJ Zone 1 (High) 40/100
74 08803 Baptistown NJ Zone 1 (High) 40/100
75 08821 Flagtown NJ Zone 1 (High) 40/100
76 08825 Frenchtown NJ Zone 1 (High) 40/100
77 08848 Milford NJ Zone 1 (High) 40/100
78 08868 Quakertown NJ Zone 1 (High) 40/100
79 08880 South Bound Brook NJ Zone 1 (High) 40/100
80 08888 Whitehouse NJ Zone 1 (High) 40/100
81 07444 Pompton Plains NJ Zone 1 (High) 42/100
82 07850 Landing NJ Zone 1 (High) 43/100
83 07023 Fanwood NJ Zone 1 (High) 45/100
84 07061 Plainfield NJ Zone 1 (High) 45/100
85 07421 Hewitt NJ Zone 1 (High) 45/100
86 07702 Shrewsbury NJ Zone 1 (High) 45/100
87 07704 Fair Haven NJ Zone 1 (High) 45/100
88 07724 Eatontown NJ Zone 1 (High) 45/100
89 07738 Lincroft NJ Zone 1 (High) 45/100
90 07751 Morganville NJ Zone 1 (High) 45/100
91 07764 West Long Branch NJ Zone 1 (High) 45/100
92 07827 Montague NJ Zone 1 (High) 45/100
93 07865 Port Murray NJ Zone 1 (High) 45/100
94 07869 Randolph NJ Zone 1 (High) 45/100
95 07921 Bedminster NJ Zone 1 (High) 45/100
96 07931 Far Hills NJ Zone 1 (High) 45/100
97 07945 Mendham NJ Zone 1 (High) 45/100
98 07950 Morris Plains NJ Zone 1 (High) 45/100
99 07979 Pottersville NJ Zone 1 (High) 45/100
100 08520 Hightstown NJ Zone 1 (High) 45/100

Methodology

Radon rankings are based on EPA county-level radon zone classifications. Zone 1 (highest risk) has predicted average indoor radon levels above 4 pCi/L — the EPA action level. Zone 2 is moderate (2-4 pCi/L) and Zone 3 is low (below 2 pCi/L). Within Zone 1, ZIP codes are sub-ranked by Home Safety Score to prioritize areas with compounding risk factors.

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 EPA Radon Zone 1?

Zone 1 is the EPA highest-risk classification, meaning the county has predicted average indoor radon levels above 4 pCi/L — the level at which the EPA recommends mitigation. Radon causes about 21,000 lung cancer deaths per year in the U.S.

Should I test for radon?

The EPA recommends testing all homes regardless of radon zone. A DIY test kit costs $15-40. Professional testing costs $150-250. If levels exceed 4 pCi/L, mitigation systems ($800-2,500) can reduce radon by up to 99%.

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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