ZIP Codes with Most EPA Violations in Pennsylvania

Out of 1,180 ZIP codes with data in Pennsylvania, these are the highest-ranked areas for recorded epa violations. See also: National ZIP Codes with Most EPA Water Violations | All Pennsylvania Rankings

Statistic	Value
ZIP codes ranked	1,180
Highest value	1,204
Median value	17
State	Pennsylvania

Top 100 Worst ZIP Codes

Rank	ZIP Code	City	State	Recorded EPA Violations	Safety Score
1	18322	Brodheadsville	PA	1,204	—
2	19460	Phoenixville	PA	983	33/100
3	19403	Norristown	PA	941	33/100
4	19426	Collegeville	PA	881	33/100
5	18041	East Greenville	PA	314	33/100
6	18073	Pennsburg	PA	308	33/100
7	18076	Red Hill	PA	305	33/100
8	18974	Warminster	PA	273	33/100
9	17740	Jersey Shore	PA	266	50/100
10	17702	Williamsport	PA	261	33/100
11	18436	Lake Ariel	PA	255	50/100
12	18951	Quakertown	PA	250	33/100
13	19504	Barto	PA	245	—
14	15531	Boswell	PA	242	67/100
15	15946	Portage	PA	226	67/100
16	15938	Lilly	PA	213	67/100
17	18070	Palm	PA	213	33/100
18	15658	Ligonier	PA	212	—
19	15958	Summerhill	PA	210	67/100
20	16803	State College	PA	210	—
21	19348	Kennett Square	PA	209	33/100
22	15868	Weedville	PA	202	—
23	15904	Johnstown	PA	201	67/100
24	19040	Hatboro	PA	194	33/100
25	19044	Horsham	PA	190	33/100
26	16870	Port Matilda	PA	188	—
27	16686	Tyrone	PA	186	50/100
28	15845	Johnsonburg	PA	170	—
29	15849	Penfield	PA	168	—
30	15856	Rockton	PA	168	—
31	17756	Muncy	PA	168	50/100
32	18914	Chalfont	PA	168	33/100
33	16833	Curwensville	PA	165	—
34	16838	Grampian	PA	165	—
35	17268	Waynesboro	PA	165	50/100
36	16844	Julian	PA	163	—
37	16801	State College	PA	153	50/100
38	18966	Southampton	PA	153	33/100
39	19002	Ambler	PA	153	33/100
40	19053	Feasterville Trevose	PA	149	33/100
41	15801	Du Bois	PA	147	—
42	18302	East Stroudsburg	PA	147	—
43	18940	Newtown	PA	147	33/100
44	15935	Hollsopple	PA	144	67/100
45	17754	Montoursville	PA	144	33/100
46	15905	Johnstown	PA	141	67/100
47	16875	Spring Mills	PA	141	—
48	19454	North Wales	PA	141	33/100
49	18944	Perkasie	PA	140	33/100
50	15942	Mineral Point	PA	136	67/100
51	18960	Sellersville	PA	131	33/100
52	16915	Coudersport	PA	130	—
53	17815	Bloomsburg	PA	128	—
54	16823	Bellefonte	PA	127	33/100
55	15848	Luthersburg	PA	125	—
56	16820	Aaronsburg	PA	124	—
57	16832	Coburn	PA	124	—
58	16854	Millheim	PA	124	—
59	16882	Woodward	PA	124	—
60	16828	Centre Hall	PA	122	50/100
61	15821	Benezett	PA	118	—
62	16646	Hastings	PA	116	67/100
63	19006	Huntingdon Valley	PA	116	33/100
64	18049	Emmaus	PA	113	33/100
65	18334	Long Pond	PA	112	—
66	15714	Northern Cambria	PA	109	67/100
67	17814	Benton	PA	109	—
68	17846	Millville	PA	109	—
69	17859	Orangeville	PA	109	—
70	15909	Johnstown	PA	108	—
71	18062	Macungie	PA	108	33/100
72	18337	Milford	PA	108	—
73	17224	Fort Loudon	PA	107	50/100
74	18954	Richboro	PA	107	33/100
75	17331	Hanover	PA	106	50/100
76	15853	Ridgway	PA	105	67/100
77	16865	Pennsylvania Furnace	PA	104	—
78	16877	Warriors Mark	PA	104	—
79	15655	Laughlintown	PA	103	—
80	18301	East Stroudsburg	PA	103	50/100
81	17737	Hughesville	PA	102	—
82	17762	Picture Rocks	PA	102	—
83	18336	Matamoras	PA	101	—
84	19090	Willow Grove	PA	101	33/100
85	17340	Littlestown	PA	100	33/100
86	15349	Mount Morris	PA	99	67/100
87	15370	Waynesburg	PA	99	67/100
88	15762	Nicktown	PA	99	67/100
89	17222	Fayetteville	PA	97	50/100
90	18938	New Hope	PA	97	33/100
91	15320	Carmichaels	PA	93	67/100
92	15327	Dilliner	PA	93	67/100
93	15338	Greensboro	PA	93	67/100
94	15351	Nemacolin	PA	93	—
95	15775	Spangler	PA	93	—
96	15824	Brockway	PA	93	—
97	15902	Johnstown	PA	93	67/100
98	15906	Johnstown	PA	93	67/100
99	18092	Zionsville	PA	93	—
100	15650	Latrobe	PA	91	33/100

Methodology

Violation counts include all types recorded in the EPA SDWIS database: Maximum Contaminant Level (MCL) violations, treatment technique violations, and monitoring/reporting violations. Both resolved and unresolved violations are counted. Higher counts may reflect longer system histories or larger service areas.

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: 2026-08-31.

Frequently Asked Questions

What counts as an EPA water violation?

EPA violations include exceeding Maximum Contaminant Levels (MCLs), failing to treat water properly (treatment technique violations), and not testing or reporting on schedule (monitoring violations). Health-based violations are the most serious.

Does a high violation count mean the water is unsafe now?

Not necessarily. Many violations are historical or monitoring-related. However, a pattern of repeated violations indicates systemic issues with water system management or infrastructure.

ZIP Codes with Most EPA Violations in Pennsylvania —...

Top 100 Worst ZIP Codes

Methodology

Frequently Asked Questions

What counts as an EPA water violation?

Does a high violation count mean the water is unsafe now?

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