Pennsylvania Cities Ranked by Indoor Radon Levels

Measured averages from Airthings devices across Pennsylvania, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.

Duncannon has the highest measured indoor radon in Pennsylvania at 25.5 pCi/L, based on Airthings measurements across 512 cities.

Updated October 19, 2026

Highest city

25.5pCi/L

Duncannon

Pennsylvania city average

4.6pCi/L

across 512 cities

Above action level

235/ 512

cities

Pennsylvania Cities Ranked by Indoor Radon Levels
#	Location	Avg level	vs action level
1	Duncannon	25.5 pCi/L	6.4× over
2	Prospect	17.6 pCi/L	4.4× over
3	Jacobus	17.3 pCi/L	4.3× over
4	Zion	16.4 pCi/L	4.1× over
5	Sand Hill	15.9 pCi/L	4.0× over
6	Greenville	15.0 pCi/L	3.8× over
7	Russellton	14.9 pCi/L	3.7× over
8	Palmerton	14.1 pCi/L	3.5× over
9	Apollo	13.5 pCi/L	3.4× over
10	Akron	13.4 pCi/L	3.3× over
11	Kutztown	13.3 pCi/L	3.3× over
12	Georgetown	13.2 pCi/L	3.3× over
13	Industry	13.2 pCi/L	3.3× over
14	Shippensburg	13.2 pCi/L	3.3× over
15	Manheim	13.2 pCi/L	3.3× over
16	Grill	13.1 pCi/L	3.3× over
17	Bloomsburg	12.9 pCi/L	3.2× over
18	Sun Valley	12.8 pCi/L	3.2× over
19	Robesonia	12.4 pCi/L	3.1× over
20	West Hills	12.0 pCi/L	3.0× over
21	Cherryville	11.7 pCi/L	2.9× over
22	Lebanon South	11.7 pCi/L	2.9× over
23	Shrewsbury	11.7 pCi/L	2.9× over
24	Hughesville	11.6 pCi/L	2.9× over
25	Strasburg	11.3 pCi/L	2.8× over
26	Centre Hall	11.3 pCi/L	2.8× over
27	Leesport	11.3 pCi/L	2.8× over
28	DuBois	11.3 pCi/L	2.8× over
29	Cementon	11.2 pCi/L	2.8× over
30	Wrightsville	11.2 pCi/L	2.8× over
31	Quarryville	10.9 pCi/L	2.7× over
32	Stewartstown	10.7 pCi/L	2.7× over
33	Factoryville	10.6 pCi/L	2.6× over
34	Rutherford	10.2 pCi/L	2.6× over
35	Spry	10.1 pCi/L	2.5× over
36	Mountville	10.0 pCi/L	2.5× over
37	Beaver Falls	9.9 pCi/L	2.5× over
38	Windsor	9.9 pCi/L	2.5× over
39	Glen Rock	9.8 pCi/L	2.4× over
40	Sinking Spring	9.8 pCi/L	2.4× over
41	Riverside	9.7 pCi/L	2.4× over
42	Jermyn	9.7 pCi/L	2.4× over
43	Shanor-Northvue	9.5 pCi/L	2.4× over
44	West Lawn	9.4 pCi/L	2.4× over
45	Lewistown	9.4 pCi/L	2.3× over
46	Effort	9.3 pCi/L	2.3× over
47	Cornwall	8.9 pCi/L	2.2× over
48	Smethport	8.9 pCi/L	2.2× over
49	Parkville	8.9 pCi/L	2.2× over
50	Palmyra	8.8 pCi/L	2.2× over
51	Penbrook	8.7 pCi/L	2.2× over
52	Lititz	8.6 pCi/L	2.2× over
53	Susquehanna Trails	8.5 pCi/L	2.1× over
54	Red Lion	8.4 pCi/L	2.1× over
55	Shiremanstown	8.4 pCi/L	2.1× over
56	Brookville	8.4 pCi/L	2.1× over
57	East Petersburg	8.2 pCi/L	2.1× over
58	Pine Grove Mills	8.1 pCi/L	2.0× over
59	Millersburg	8.1 pCi/L	2.0× over
60	Freeport	8.0 pCi/L	2.0× over
61	Marysville	8.0 pCi/L	2.0× over
62	Summit Hill	7.9 pCi/L	2.0× over
63	Cressona	7.9 pCi/L	2.0× over
64	Valley View	7.9 pCi/L	2.0× over
65	Montrose	7.8 pCi/L	2.0× over
66	Garden View	7.8 pCi/L	2.0× over
67	Lawnton	7.8 pCi/L	1.9× over
68	Mount Joy	7.8 pCi/L	1.9× over
69	Mount Holly Springs	7.8 pCi/L	1.9× over
70	Lake Wynonah	7.7 pCi/L	1.9× over
71	Honey Brook	7.6 pCi/L	1.9× over
72	Light Street	7.6 pCi/L	1.9× over
73	Carnegie	7.6 pCi/L	1.9× over
74	Elysburg	7.5 pCi/L	1.9× over
75	Jefferson Hills	7.5 pCi/L	1.9× over
76	Nazareth	7.3 pCi/L	1.8× over
77	Paoli	7.3 pCi/L	1.8× over
78	Skyline View	7.3 pCi/L	1.8× over
79	Calumet	7.2 pCi/L	1.8× over
80	Somerset	7.2 pCi/L	1.8× over
81	Lakemont	7.1 pCi/L	1.8× over
82	Hummelstown	7.0 pCi/L	1.8× over
83	Allentown	7.0 pCi/L	1.7× over
84	Cleona	6.9 pCi/L	1.7× over
85	Myerstown	6.9 pCi/L	1.7× over
86	Northumberland	6.9 pCi/L	1.7× over
87	Houserville	6.9 pCi/L	1.7× over
88	Mifflintown	6.8 pCi/L	1.7× over
89	Breinigsville	6.8 pCi/L	1.7× over
90	Slatington	6.7 pCi/L	1.7× over
91	Brodheadsville	6.6 pCi/L	1.6× over
92	Clay	6.6 pCi/L	1.6× over
93	Mechanicsburg	6.5 pCi/L	1.6× over
94	Abbottstown	6.5 pCi/L	1.6× over
95	Fountain Hill	6.5 pCi/L	1.6× over
96	York	6.5 pCi/L	1.6× over
97	Wernersville	6.4 pCi/L	1.6× over
98	West Fairview	6.4 pCi/L	1.6× over
99	Murrysville	6.4 pCi/L	1.6× over
100	Zelienople	6.3 pCi/L	1.6× over
101	Stony Creek Mills	6.3 pCi/L	1.6× over
102	Ellport	6.3 pCi/L	1.6× over
103	Treasure Lake	6.3 pCi/L	1.6× over
104	Dorneyville	6.3 pCi/L	1.6× over
105	Waynesboro	6.3 pCi/L	1.6× over
106	White Oak	6.3 pCi/L	1.6× over
107	Chambersburg	6.3 pCi/L	1.6× over
108	Emmaus	6.3 pCi/L	1.6× over
109	Millvale	6.3 pCi/L	1.6× over
110	Bath	6.2 pCi/L	1.6× over
111	Colonial Park	6.2 pCi/L	1.6× over
112	Hasson Heights	6.1 pCi/L	1.5× over
113	Ben Avon	6.1 pCi/L	1.5× over
114	Saylorsburg	6.1 pCi/L	1.5× over
115	Tunkhannock	6.1 pCi/L	1.5× over
116	West View	6.1 pCi/L	1.5× over
117	Back Mountain	6.0 pCi/L	1.5× over
118	Mars	6.0 pCi/L	1.5× over
119	Mechanicsville	6.0 pCi/L	1.5× over
120	Clarion	6.0 pCi/L	1.5× over
121	Spring Grove	5.9 pCi/L	1.5× over
122	Saxonburg	5.9 pCi/L	1.5× over
123	Annville	5.9 pCi/L	1.5× over
124	Lebanon	5.9 pCi/L	1.5× over
125	Greensburg	5.8 pCi/L	1.5× over
126	Milton	5.8 pCi/L	1.5× over
127	Lawson Heights	5.8 pCi/L	1.4× over
128	Boalsburg	5.7 pCi/L	1.4× over
129	Old Orchard	5.7 pCi/L	1.4× over
130	Bradford Woods	5.7 pCi/L	1.4× over
131	Allison Park	5.7 pCi/L	1.4× over
132	Manchester	5.7 pCi/L	1.4× over
133	Landisville	5.7 pCi/L	1.4× over
134	New Berlinville	5.7 pCi/L	1.4× over
135	Columbia	5.7 pCi/L	1.4× over
136	Biglerville	5.6 pCi/L	1.4× over
137	Chicora	5.6 pCi/L	1.4× over
138	New Holland	5.6 pCi/L	1.4× over
139	Saint Marys	5.6 pCi/L	1.4× over
140	Evans City	5.5 pCi/L	1.4× over
141	Horsham	5.5 pCi/L	1.4× over
142	Lower Allen	5.5 pCi/L	1.4× over
143	South Coatesville	5.5 pCi/L	1.4× over
144	Youngsville	5.5 pCi/L	1.4× over
145	Trexlertown	5.5 pCi/L	1.4× over
146	Guilford	5.5 pCi/L	1.4× over
147	Middletown	5.5 pCi/L	1.4× over
148	Oley	5.4 pCi/L	1.4× over
149	Paxtonia	5.3 pCi/L	1.3× over
150	Loganville	5.3 pCi/L	1.3× over
151	Homeacre-Lyndora	5.3 pCi/L	1.3× over
152	Mercersburg	5.3 pCi/L	1.3× over
153	Spring City	5.3 pCi/L	1.3× over
154	Clarks Summit	5.3 pCi/L	1.3× over
155	Millersville	5.3 pCi/L	1.3× over
156	Stormstown	5.3 pCi/L	1.3× over
157	Coatesville	5.2 pCi/L	1.3× over
158	Linntown	5.2 pCi/L	1.3× over
159	Bally	5.2 pCi/L	1.3× over
160	Schlusser	5.2 pCi/L	1.3× over
161	Parkesburg	5.2 pCi/L	1.3× over
162	Ambridge	5.1 pCi/L	1.3× over
163	McMurray	5.1 pCi/L	1.3× over
164	Cecil-Bishop	5.1 pCi/L	1.3× over
165	Progress	5.1 pCi/L	1.3× over
166	Hershey	5.1 pCi/L	1.3× over
167	Monroeville	5.1 pCi/L	1.3× over
168	Boiling Springs	5.0 pCi/L	1.3× over
169	Easton	5.0 pCi/L	1.2× over
170	Franklin Park	5.0 pCi/L	1.2× over
171	Bellefonte	4.9 pCi/L	1.2× over
172	Butler	4.9 pCi/L	1.2× over
173	Willow Street	4.9 pCi/L	1.2× over
174	Lancaster	4.9 pCi/L	1.2× over
175	Monaca	4.8 pCi/L	1.2× over
176	Camp Hill	4.8 pCi/L	1.2× over
177	Elizabethtown	4.8 pCi/L	1.2× over
178	Spring Ridge	4.8 pCi/L	1.2× over
179	Enola	4.8 pCi/L	1.2× over
180	Selinsgrove	4.8 pCi/L	1.2× over
181	Emsworth	4.7 pCi/L	1.2× over
182	Hanover	4.7 pCi/L	1.2× over
183	Etna	4.7 pCi/L	1.2× over
184	Berwyn	4.6 pCi/L	1.2× over
185	Fleetwood	4.6 pCi/L	1.2× over
186	Stonybrook	4.6 pCi/L	1.2× over
187	Oreland	4.6 pCi/L	1.1× over
188	Cranberry Township	4.6 pCi/L	1.1× over
189	Wescosville	4.6 pCi/L	1.1× over
190	Arlington Heights	4.5 pCi/L	1.1× over
191	Radnor	4.5 pCi/L	1.1× over
192	Weigelstown	4.5 pCi/L	1.1× over
193	Swissvale	4.5 pCi/L	1.1× over
194	Stroudsburg	4.5 pCi/L	1.1× over
195	Mansfield	4.4 pCi/L	1.1× over
196	Churchville	4.4 pCi/L	1.1× over
197	Eastlawn Gardens	4.4 pCi/L	1.1× over
198	Littlestown	4.4 pCi/L	1.1× over
199	Matamoras	4.4 pCi/L	1.1× over
200	Gold Key Lake	4.4 pCi/L	1.1× over
201	Northampton	4.4 pCi/L	1.1× over
202	Ephrata	4.4 pCi/L	1.1× over
203	Hokendauqua	4.4 pCi/L	1.1× over
204	Schnecksville	4.4 pCi/L	1.1× over
205	Pleasant Hills	4.4 pCi/L	1.1× over
206	Carnot-Moon	4.3 pCi/L	1.1× over
207	Sewickley	4.3 pCi/L	1.1× over
208	Dillsburg	4.3 pCi/L	1.1× over
209	Canonsburg	4.3 pCi/L	1.1× over
210	Boyertown	4.3 pCi/L	1.1× over
211	Churchill	4.3 pCi/L	1.1× over
212	Nixon	4.3 pCi/L	1.1× over
213	Fernway	4.3 pCi/L	1.1× over
214	Fox Chapel	4.2 pCi/L	1.1× over
215	Greencastle	4.2 pCi/L	1.1× over
216	Huntingdon	4.2 pCi/L	1.1× over
217	Chevy Chase Heights	4.2 pCi/L	1.1× over
218	Duboistown	4.2 pCi/L	1.1× over
219	Rennerdale	4.2 pCi/L	1.1× over
220	New Castle Northwest	4.2 pCi/L	1.0× over
221	Latrobe	4.2 pCi/L	1.0× over
222	Coraopolis	4.2 pCi/L	1.0× over
223	Plum	4.2 pCi/L	1.0× over
224	Ambler	4.1 pCi/L	1.0× over
225	Dover	4.1 pCi/L	1.0× over
226	Burgettstown	4.1 pCi/L	1.0× over
227	Jersey Shore	4.1 pCi/L	1.0× over
228	Conyngham	4.1 pCi/L	1.0× over
229	Elverson	4.1 pCi/L	1.0× over
230	Gastonville	4.1 pCi/L	1.0× over
231	Glenside	4.0 pCi/L	1.0× over
232	Level Green	4.0 pCi/L	1.0× over
233	Raubsville	4.0 pCi/L	1.0× over
234	Crafton	4.0 pCi/L	1.0× over
235	Emigsville	4.0 pCi/L	1.0× over
✓ Below EPA action level (4 pCi/L)
236	Amity Gardens	4.0 pCi/L	1.0× under
237	Oakmont	4.0 pCi/L	1.0× under
238	Muse	4.0 pCi/L	1.0× under
239	Mountain Top	4.0 pCi/L	1.0× under
240	Harrisburg	3.9 pCi/L	1.0× under
241	Springdale	3.9 pCi/L	1.0× under
242	New Cumberland	3.8 pCi/L	1.0× under
243	Spring House	3.8 pCi/L	1.0× under
244	Seven Fields	3.8 pCi/L	1.0× under
245	State College	3.8 pCi/L	1.0× under
246	Yorklyn	3.8 pCi/L	0.9× under
247	Downingtown	3.8 pCi/L	0.9× under
248	Wyomissing Hills	3.8 pCi/L	0.9× under
249	Gibsonia	3.8 pCi/L	0.9× under
250	Carlisle	3.8 pCi/L	0.9× under
251	Eagleville	3.7 pCi/L	0.9× under
252	Jenkintown	3.7 pCi/L	0.9× under
253	New Freedom	3.7 pCi/L	0.9× under
254	Valley Green	3.7 pCi/L	0.9× under
255	North Wales	3.7 pCi/L	0.9× under
256	Edgewood	3.7 pCi/L	0.9× under
257	Beaver	3.6 pCi/L	0.9× under
258	Towamensing Trails	3.6 pCi/L	0.9× under
259	Milford	3.6 pCi/L	0.9× under
260	East Stroudsburg	3.6 pCi/L	0.9× under
261	South Uniontown	3.6 pCi/L	0.9× under
262	Wayne	3.6 pCi/L	0.9× under
263	Ingram	3.6 pCi/L	0.9× under
264	Roaring Spring	3.6 pCi/L	0.9× under
265	Fox Run	3.5 pCi/L	0.9× under
266	Sanatoga	3.5 pCi/L	0.9× under
267	Fairview	3.5 pCi/L	0.9× under
268	Thorndale	3.5 pCi/L	0.9× under
269	East Berlin	3.5 pCi/L	0.9× under
270	Lemont	3.5 pCi/L	0.9× under
271	Jim Thorpe	3.5 pCi/L	0.9× under
272	McDonald	3.5 pCi/L	0.9× under
273	Enlow	3.5 pCi/L	0.9× under
274	Lawrence Park	3.5 pCi/L	0.9× under
275	Bryn Mawr	3.5 pCi/L	0.9× under
276	Hemlock Farms	3.5 pCi/L	0.9× under
277	Media	3.5 pCi/L	0.9× under
278	Tatamy	3.5 pCi/L	0.9× under
279	Meridian	3.5 pCi/L	0.9× under
280	Pottsville	3.4 pCi/L	0.9× under
281	Palmer Heights	3.4 pCi/L	0.9× under
282	Pennsburg	3.4 pCi/L	0.8× under
283	Washington	3.4 pCi/L	0.8× under
284	Throop	3.4 pCi/L	0.8× under
285	Bethlehem	3.4 pCi/L	0.8× under
286	Baden	3.4 pCi/L	0.8× under
287	Bridgeville	3.4 pCi/L	0.8× under
288	Richboro	3.4 pCi/L	0.8× under
289	Gettysburg	3.3 pCi/L	0.8× under
290	Campbelltown	3.3 pCi/L	0.8× under
291	Langhorne	3.3 pCi/L	0.8× under
292	South Park Township	3.3 pCi/L	0.8× under
293	Edgeworth	3.3 pCi/L	0.8× under
294	Pocono Ranch Lands	3.3 pCi/L	0.8× under
295	Hollidaysburg	3.3 pCi/L	0.8× under
296	McSherrystown	3.3 pCi/L	0.8× under
297	Brittany Farms-Highlands	3.2 pCi/L	0.8× under
298	Oakdale	3.2 pCi/L	0.8× under
299	Tinicum	3.2 pCi/L	0.8× under
300	Conshohocken	3.2 pCi/L	0.8× under
301	Lake Meade	3.2 pCi/L	0.8× under
302	Chalfont	3.2 pCi/L	0.8× under
303	Sturgeon	3.2 pCi/L	0.8× under
304	New Hope	3.2 pCi/L	0.8× under
305	Shiloh	3.2 pCi/L	0.8× under
306	Wyomissing	3.1 pCi/L	0.8× under
307	Glenshaw	3.1 pCi/L	0.8× under
308	Morrisville	3.1 pCi/L	0.8× under
309	Grove City	3.1 pCi/L	0.8× under
310	Newtown Grant	3.1 pCi/L	0.8× under
311	Tannersville	3.1 pCi/L	0.8× under
312	Williamsport	3.1 pCi/L	0.8× under
313	Bakerstown	3.1 pCi/L	0.8× under
314	Trooper	3.1 pCi/L	0.8× under
315	Village Shires	3.1 pCi/L	0.8× under
316	Skippack	3.1 pCi/L	0.8× under
317	Macungie	3.1 pCi/L	0.8× under
318	Manor	3.1 pCi/L	0.8× under
319	Brownstown	3.0 pCi/L	0.8× under
320	North Catasauqua	3.0 pCi/L	0.8× under
321	Scranton	3.0 pCi/L	0.8× under
322	Caln	3.0 pCi/L	0.8× under
323	South Waverly	3.0 pCi/L	0.7× under
324	Braddock Hills	3.0 pCi/L	0.7× under
325	Scotland	3.0 pCi/L	0.7× under
326	Tyrone	3.0 pCi/L	0.7× under
327	Pottsgrove	3.0 pCi/L	0.7× under
328	Spinnerstown	2.9 pCi/L	0.7× under
329	Wilkinsburg	2.9 pCi/L	0.7× under
330	Forest Hills	2.9 pCi/L	0.7× under
331	Coopersburg	2.9 pCi/L	0.7× under
332	Springfield	2.9 pCi/L	0.7× under
333	Imperial	2.9 pCi/L	0.7× under
334	New Oxford	2.9 pCi/L	0.7× under
335	Delmont	2.9 pCi/L	0.7× under
336	Moscow	2.9 pCi/L	0.7× under
337	Upper Saint Clair	2.9 pCi/L	0.7× under
338	Devon	2.9 pCi/L	0.7× under
339	Trappe	2.9 pCi/L	0.7× under
340	Mifflinburg	2.8 pCi/L	0.7× under
341	Plumsteadville	2.8 pCi/L	0.7× under
342	Chester Springs	2.8 pCi/L	0.7× under
343	Shavertown	2.8 pCi/L	0.7× under
344	Cheswick	2.8 pCi/L	0.7× under
345	Indiana	2.8 pCi/L	0.7× under
346	Bellevue	2.8 pCi/L	0.7× under
347	Harleysville	2.8 pCi/L	0.7× under
348	Woxall	2.8 pCi/L	0.7× under
349	Altoona	2.8 pCi/L	0.7× under
350	Thompsonville	2.8 pCi/L	0.7× under
351	Aliquippa	2.8 pCi/L	0.7× under
352	Richlandtown	2.8 pCi/L	0.7× under
353	Saw Creek	2.8 pCi/L	0.7× under
354	Penndel	2.7 pCi/L	0.7× under
355	Sharpsburg	2.7 pCi/L	0.7× under
356	Wolfdale	2.7 pCi/L	0.7× under
357	Pocono Pines	2.7 pCi/L	0.7× under
358	Harleigh	2.7 pCi/L	0.7× under
359	Hatfield	2.7 pCi/L	0.7× under
360	Kulpsville	2.7 pCi/L	0.7× under
361	Laporte	2.7 pCi/L	0.7× under
362	Paxtang	2.7 pCi/L	0.7× under
363	Brentwood	2.7 pCi/L	0.7× under
364	Halfway House	2.7 pCi/L	0.7× under
365	Oxford	2.7 pCi/L	0.7× under
366	Pittsburgh	2.7 pCi/L	0.7× under
367	Schwenksville	2.7 pCi/L	0.7× under
368	West Chester	2.6 pCi/L	0.7× under
369	Honesdale	2.6 pCi/L	0.7× under
370	Wellsboro	2.6 pCi/L	0.7× under
371	Jeannette	2.6 pCi/L	0.7× under
372	Mountainhome	2.6 pCi/L	0.7× under
373	Parkside	2.6 pCi/L	0.7× under
374	Hellertown	2.6 pCi/L	0.6× under
375	Doylestown	2.6 pCi/L	0.6× under
376	Gilbertsville	2.6 pCi/L	0.6× under
377	West Conshohocken	2.6 pCi/L	0.6× under
378	New Britain	2.6 pCi/L	0.6× under
379	Morton	2.5 pCi/L	0.6× under
380	Brackenridge	2.5 pCi/L	0.6× under
381	Exton	2.5 pCi/L	0.6× under
382	Woodbourne	2.5 pCi/L	0.6× under
383	Hatboro	2.5 pCi/L	0.6× under
384	Plymouth Meeting	2.5 pCi/L	0.6× under
385	Trevose	2.5 pCi/L	0.6× under
386	South Greensburg	2.5 pCi/L	0.6× under
387	Verona	2.5 pCi/L	0.6× under
388	Dormont	2.5 pCi/L	0.6× under
389	East Bangor	2.5 pCi/L	0.6× under
390	Old Forge	2.5 pCi/L	0.6× under
391	Fairless Hills	2.5 pCi/L	0.6× under
392	McGovern	2.5 pCi/L	0.6× under
393	Wyncote	2.5 pCi/L	0.6× under
394	Homestead	2.5 pCi/L	0.6× under
395	Avonmore	2.4 pCi/L	0.6× under
396	Dresher	2.4 pCi/L	0.6× under
397	Audubon	2.4 pCi/L	0.6× under
398	Ebensburg	2.4 pCi/L	0.6× under
399	Fort Washington	2.4 pCi/L	0.6× under
400	Freemansburg	2.4 pCi/L	0.6× under
401	King of Prussia	2.4 pCi/L	0.6× under
402	Green Tree	2.4 pCi/L	0.6× under
403	Slippery Rock	2.4 pCi/L	0.6× under
404	Wyndmoor	2.4 pCi/L	0.6× under
405	Lima	2.4 pCi/L	0.6× under
406	Waymart	2.4 pCi/L	0.6× under
407	Broomall	2.4 pCi/L	0.6× under
408	East Washington	2.4 pCi/L	0.6× under
409	Park Forest Village	2.4 pCi/L	0.6× under
410	Bristol	2.4 pCi/L	0.6× under
411	Telford	2.4 pCi/L	0.6× under
412	Chesterbrook	2.3 pCi/L	0.6× under
413	Kenilworth	2.3 pCi/L	0.6× under
414	Quakertown	2.3 pCi/L	0.6× under
415	Evansburg	2.3 pCi/L	0.6× under
416	West Norriton	2.3 pCi/L	0.6× under
417	Warminster Heights	2.3 pCi/L	0.6× under
418	Bloomfield	2.3 pCi/L	0.6× under
419	Trafford	2.3 pCi/L	0.6× under
420	Hulmeville	2.3 pCi/L	0.6× under
421	Pottstown	2.3 pCi/L	0.6× under
422	Indian Mountain Lake	2.3 pCi/L	0.6× under
423	Irwin	2.2 pCi/L	0.6× under
424	Dalton	2.2 pCi/L	0.6× under
425	Malvern	2.2 pCi/L	0.6× under
426	Maple Glen	2.2 pCi/L	0.6× under
427	Fellsburg	2.2 pCi/L	0.6× under
428	Hawley	2.2 pCi/L	0.5× under
429	Jonestown	2.2 pCi/L	0.5× under
430	Limerick	2.2 pCi/L	0.5× under
431	Orwigsburg	2.2 pCi/L	0.5× under
432	Souderton	2.2 pCi/L	0.5× under
433	Yardley	2.2 pCi/L	0.5× under
434	Woodside	2.2 pCi/L	0.5× under
435	Emerald Lakes	2.2 pCi/L	0.5× under
436	Ivyland	2.2 pCi/L	0.5× under
437	Erie	2.2 pCi/L	0.5× under
438	Dupont	2.1 pCi/L	0.5× under
439	New Castle	2.1 pCi/L	0.5× under
440	Dublin	2.1 pCi/L	0.5× under
441	East York	2.1 pCi/L	0.5× under
442	Swarthmore	2.1 pCi/L	0.5× under
443	Stowe	2.1 pCi/L	0.5× under
444	Sunrise Lake	2.1 pCi/L	0.5× under
445	Bryn Athyn	2.1 pCi/L	0.5× under
446	Montgomeryville	2.0 pCi/L	0.5× under
447	Whitehall	2.0 pCi/L	0.5× under
448	Mount Oliver	2.0 pCi/L	0.5× under
449	Penn Wynne	2.0 pCi/L	0.5× under
450	Blue Bell	2.0 pCi/L	0.5× under
451	Chester Heights	2.0 pCi/L	0.5× under
452	Mount Lebanon	2.0 pCi/L	0.5× under
453	Meadowood	2.0 pCi/L	0.5× under
454	Bethel Park	2.0 pCi/L	0.5× under
455	Bedminster	1.9 pCi/L	0.5× under
456	Collegeville	1.9 pCi/L	0.5× under
457	Rockledge	1.9 pCi/L	0.5× under
458	Flourtown	1.9 pCi/L	0.5× under
459	Jacksonwald	1.9 pCi/L	0.5× under
460	Lampeter	1.9 pCi/L	0.5× under
461	Boothwyn	1.9 pCi/L	0.5× under
462	Harveys Lake	1.9 pCi/L	0.5× under
463	Blandon	1.8 pCi/L	0.5× under
464	Lansdale	1.8 pCi/L	0.5× under
465	Sellersville	1.8 pCi/L	0.5× under
466	West Newton	1.8 pCi/L	0.5× under
467	Lewisburg	1.8 pCi/L	0.4× under
468	Mount Cobb	1.8 pCi/L	0.4× under
469	Forest City	1.8 pCi/L	0.4× under
470	Perkasie	1.8 pCi/L	0.4× under
471	Village Green-Green Ridge	1.8 pCi/L	0.4× under
472	Levittown	1.8 pCi/L	0.4× under
473	Narberth	1.8 pCi/L	0.4× under
474	Ligonier	1.8 pCi/L	0.4× under
475	Ardmore	1.7 pCi/L	0.4× under
476	Phoenixville	1.7 pCi/L	0.4× under
477	Drexel Hill	1.7 pCi/L	0.4× under
478	Feasterville	1.7 pCi/L	0.4× under
479	Royersford	1.7 pCi/L	0.4× under
480	Castle Shannon	1.7 pCi/L	0.4× under
481	Fairchance	1.7 pCi/L	0.4× under
482	Heidelberg	1.7 pCi/L	0.4× under
483	Eddington	1.6 pCi/L	0.4× under
484	West Grove	1.6 pCi/L	0.4× under
485	Newtown	1.6 pCi/L	0.4× under
486	Aspinwall	1.5 pCi/L	0.4× under
487	Willow Grove	1.5 pCi/L	0.4× under
488	McKees Rocks	1.5 pCi/L	0.4× under
489	Hermitage	1.5 pCi/L	0.4× under
490	Avondale	1.5 pCi/L	0.4× under
491	Bala-Cynwyd	1.5 pCi/L	0.4× under
492	Kennett Square	1.4 pCi/L	0.4× under
493	Northwest Harborcreek	1.4 pCi/L	0.4× under
494	Norristown	1.3 pCi/L	0.3× under
495	Glenolden	1.3 pCi/L	0.3× under
496	Topton	1.3 pCi/L	0.3× under
497	Mount Pleasant	1.3 pCi/L	0.3× under
498	Hughestown	1.3 pCi/L	0.3× under
499	Millbourne	1.3 pCi/L	0.3× under
500	Bridgeport	1.2 pCi/L	0.3× under
501	Brookhaven	1.2 pCi/L	0.3× under
502	Ancient Oaks	1.2 pCi/L	0.3× under
503	Newport	1.2 pCi/L	0.3× under
504	Philadelphia	1.2 pCi/L	0.3× under
505	Meadville	1.1 pCi/L	0.3× under
506	Mount Pocono	1.1 pCi/L	0.3× under
507	East Greenville	1.1 pCi/L	0.3× under
508	Birchwood Lakes	1.0 pCi/L	0.2× under
509	Cornwells Heights	1.0 pCi/L	0.2× under
510	Croydon	0.9 pCi/L	0.2× under
511	Bradford	0.9 pCi/L	0.2× under
512	Dunmore	0.9 pCi/L	0.2× under

See USA cities ranked by radon level See all States ranked by radon level