2026 Rankings

Highest Radon Risk ZIP Codes in Pennsylvania — 2026

Last updated: June 4, 2026

1,596 ZIP codes ranked by Radon Zone #1: ZIP 19083 (Havertown, PA) — 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 1,596 ZIP codes with data in Pennsylvania, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes with Highest Radon Risk | All Pennsylvania Rankings

Statistic Value
ZIP codes ranked 1,596
Lowest value Zone 1 (High)
Median value Zone 1 (High)
State Pennsylvania

100 Lowest-Ranked ZIP Codes

Rank ZIP Code City State Radon Zone Safety Score
1 19083 Havertown PA Zone 1 (High) 10/100
2 16049 Parker PA Zone 1 (High) 15/100
3 18690 Dallas PA Zone 1 (High) 15/100
4 17756 Muncy PA Zone 1 (High) 16/100
5 18448 Olyphant PA Zone 1 (High) 16/100
6 18447 Olyphant PA Zone 1 (High) 21/100
7 18603 Berwick PA Zone 1 (High) 21/100
8 16947 Troy PA Zone 1 (High) 26/100
9 17020 Duncannon PA Zone 1 (High) 26/100
10 17737 Hughesville PA Zone 1 (High) 26/100
11 17859 Orangeville PA Zone 1 (High) 26/100
12 18349 Pocono Manor PA Zone 1 (High) 26/100
13 18612 Dallas PA Zone 1 (High) 26/100
14 18630 Meshoppen PA Zone 1 (High) 26/100
15 18801 Montrose PA Zone 1 (High) 26/100
16 16229 Freeport PA Zone 1 (High) 27/100
17 16682 Sproul PA Zone 1 (High) 27/100
18 18013 Bangor PA Zone 1 (High) 28/100
19 17064 Mount Gretna PA Zone 1 (High) 29/100
20 17963 Pine Grove PA Zone 1 (High) 29/100
21 16001 Butler PA Zone 1 (High) 30/100
22 17074 Newport PA Zone 1 (High) 30/100
23 17771 Trout Run PA Zone 1 (High) 31/100
24 18076 Red Hill PA Zone 1 (High) 31/100
25 18651 Plymouth PA Zone 1 (High) 31/100
26 19550 Rehrersburg PA Zone 1 (High) 31/100
27 16342 Polk PA Zone 1 (High) 32/100
28 18360 Stroudsburg PA Zone 1 (High) 32/100
29 18444 Moscow PA Zone 1 (High) 32/100
30 18628 Lopez PA Zone 1 (High) 32/100
31 19536 Lyon Station PA Zone 1 (High) 32/100
32 15658 Ligonier PA Zone 1 (High) 33/100
33 17579 Strasburg PA Zone 1 (High) 33/100
34 18372 Tannersville PA Zone 1 (High) 33/100
35 18917 Dublin PA Zone 1 (High) 33/100
36 19440 Hatfield PA Zone 1 (High) 33/100
37 15104 Braddock PA Zone 1 (High) 34/100
38 16686 Tyrone PA Zone 1 (High) 34/100
39 17090 Shermans Dale PA Zone 1 (High) 34/100
40 19317 Chadds Ford PA Zone 1 (High) 34/100
41 15017 Bridgeville PA Zone 1 (High) 35/100
42 15849 Penfield PA Zone 1 (High) 35/100
43 16002 Butler PA Zone 1 (High) 35/100
44 17018 Dauphin PA Zone 1 (High) 35/100
45 17034 Highspire PA Zone 1 (High) 35/100
46 17728 Cogan Station PA Zone 1 (High) 35/100
47 17837 Lewisburg PA Zone 1 (High) 35/100
48 17857 Northumberland PA Zone 1 (High) 35/100
49 17889 Winfield PA Zone 1 (High) 35/100
50 18040 Easton PA Zone 1 (High) 35/100
51 18042 Easton PA Zone 1 (High) 35/100
52 18634 Nanticoke PA Zone 1 (High) 35/100
53 18640 Pittston PA Zone 1 (High) 35/100
54 18643 Pittston PA Zone 1 (High) 35/100
55 18655 Shickshinny PA Zone 1 (High) 35/100
56 18704 Kingston PA Zone 1 (High) 35/100
57 18847 Susquehanna PA Zone 1 (High) 35/100
58 18940 Newtown PA Zone 1 (High) 35/100
59 18972 Upper Black Eddy PA Zone 1 (High) 35/100
60 18977 Washington Crossing PA Zone 1 (High) 35/100
61 19015 Brookhaven PA Zone 1 (High) 35/100
62 19040 Hatboro PA Zone 1 (High) 35/100
63 19047 Langhorne PA Zone 1 (High) 35/100
64 19087 Wayne PA Zone 1 (High) 35/100
65 19428 Conshohocken PA Zone 1 (High) 35/100
66 15729 Commodore PA Zone 1 (High) 36/100
67 16115 Darlington PA Zone 1 (High) 36/100
68 17013 Carlisle PA Zone 1 (High) 36/100
69 17015 Carlisle PA Zone 1 (High) 36/100
70 18088 Walnutport PA Zone 1 (High) 36/100
71 18938 New Hope PA Zone 1 (High) 36/100
72 16052 Prospect PA Zone 1 (High) 37/100
73 17261 South Mountain PA Zone 1 (High) 37/100
74 17516 Conestoga PA Zone 1 (High) 37/100
75 17701 Williamsport PA Zone 1 (High) 37/100
76 18419 Factoryville PA Zone 1 (High) 37/100
77 19362 Nottingham PA Zone 1 (High) 37/100
78 19492 Zieglerville PA Zone 1 (High) 37/100
79 19534 Lenhartsville PA Zone 1 (High) 37/100
80 15030 Creighton PA Zone 1 (High) 38/100
81 17003 Annville PA Zone 1 (High) 38/100
82 17509 Christiana PA Zone 1 (High) 38/100
83 17744 Linden PA Zone 1 (High) 38/100
84 17776 Waterville PA Zone 1 (High) 38/100
85 17954 Minersville PA Zone 1 (High) 38/100
86 17961 Orwigsburg PA Zone 1 (High) 38/100
87 18030 Bowmanstown PA Zone 1 (High) 38/100
88 18058 Kunkletown PA Zone 1 (High) 38/100
89 18066 New Tripoli PA Zone 1 (High) 38/100
90 18708 Shavertown PA Zone 1 (High) 38/100
91 19311 Avondale PA Zone 1 (High) 38/100
92 19540 Mohnton PA Zone 1 (High) 38/100
93 16025 Chicora PA Zone 1 (High) 39/100
94 16635 Duncansville PA Zone 1 (High) 39/100
95 17233 Mc Connellsburg PA Zone 1 (High) 39/100
96 17922 Auburn PA Zone 1 (High) 39/100
97 15004 Atlasburg PA Zone 1 (High) 40/100
98 15015 Bradfordwoods PA Zone 1 (High) 40/100
99 15025 Clairton PA Zone 1 (High) 40/100
100 15035 East Mc Keesport PA Zone 1 (High) 40/100

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 →

Related Rankings

Water Safety 2026 EPA violations and water quality scores Lead Risk 2026 Lead pipe infrastructure and EPA exceedances Infrastructure 2026 Aging pipes, system age and remediation costs
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.

Get safety alerts for Pennsylvania

Free updates when EPA data changes for this area. No spam.

Unsubscribe anytime. Privacy Policy.

Share This Page

X Facebook
Check your water filter options Free tool — no phone call required.