PFAS Detections in Illinois ZIP Codes — 2026

Out of 310 ZIP codes with data in Illinois, these are the highest-ranked areas for pfas status. See also: National ZIP Codes with PFAS Detections in Water | All Illinois Rankings

Statistic	Value
ZIP codes ranked	310
Highest value	0.2 ppt
Median value	0.0 ppt
State	Illinois

Top 100 Worst ZIP Codes

Rank	ZIP Code	City	State	PFAS Status	Safety Score
1	62656	Lincoln	IL	0.2 ppt	—
2	61401	Galesburg	IL	0.1 ppt	—
3	61410	Abingdon	IL	0.1 ppt	—
4	61430	East Galesburg	IL	0.1 ppt	—
5	61448	Knoxville	IL	0.1 ppt	—
6	60403	Crest Hill	IL	0.1 ppt	55/100
7	62010	Bethalto	IL	0.0 ppt	63/100
8	62025	Edwardsville	IL	0.0 ppt	54/100
9	62084	Roxana	IL	0.0 ppt	56/100
10	62097	Worden	IL	0.0 ppt	64/100
11	61244	East Moline	IL	0.0 ppt	50/100
12	62012	Brighton	IL	0.0 ppt	79/100
13	62035	Godfrey	IL	0.0 ppt	64/100
14	62260	Millstadt	IL	0.0 ppt	66/100
15	61265	Moline	IL	0.0 ppt	50/100
16	62234	Collinsville	IL	0.0 ppt	50/100
17	60440	Bolingbrook	IL	0.0 ppt	80/100
18	60446	Romeoville	IL	0.0 ppt	82/100
19	60544	Plainfield	IL	0.0 ppt	79/100
20	62040	Granite City	IL	0.0 ppt	67/100
21	62095	Wood River	IL	0.0 ppt	80/100
22	62031	Fieldon	IL	0.0 ppt	66/100
23	62052	Jerseyville	IL	0.0 ppt	64/100
24	61011	Caledonia	IL	0.0 ppt	—
25	61073	Roscoe	IL	0.0 ppt	47/100
26	61103	Rockford	IL	0.0 ppt	49/100
27	61111	Loves Park	IL	0.0 ppt	48/100
28	61115	Machesney Park	IL	0.0 ppt	49/100
29	62034	Glen Carbon	IL	0.0 ppt	79/100
30	62059	Lovejoy	IL	0.0 ppt	83/100
31	62060	Madison	IL	0.0 ppt	82/100
32	62090	Venice	IL	0.0 ppt	83/100
33	62201	East Saint Louis	IL	0.0 ppt	68/100
34	62203	East Saint Louis	IL	0.0 ppt	68/100
35	62204	East Saint Louis	IL	0.0 ppt	68/100
36	62205	East Saint Louis	IL	0.0 ppt	83/100
37	62206	East Saint Louis	IL	0.0 ppt	83/100
38	62207	East Saint Louis	IL	0.0 ppt	83/100
39	62208	Fairview Heights	IL	0.0 ppt	68/100
40	62220	Belleville	IL	0.0 ppt	83/100
41	62221	Belleville	IL	0.0 ppt	83/100
42	62223	Belleville	IL	0.0 ppt	83/100
43	62225	Scott Air Force Base	IL	0.0 ppt	83/100
44	62226	Belleville	IL	0.0 ppt	83/100
45	62232	Caseyville	IL	0.0 ppt	68/100
46	62236	Columbia	IL	0.0 ppt	—
47	62239	Dupo	IL	0.0 ppt	65/100
48	62240	East Carondelet	IL	0.0 ppt	65/100
49	62269	O Fallon	IL	0.0 ppt	83/100
50	62285	Smithton	IL	0.0 ppt	79/100
51	62298	Waterloo	IL	0.0 ppt	—
52	62002	Alton	IL	0.0 ppt	81/100
53	62018	Cottage Hills	IL	0.0 ppt	81/100
54	62022	Dow	IL	0.0 ppt	66/100
55	62028	Elsah	IL	0.0 ppt	66/100
56	62037	Grafton	IL	0.0 ppt	66/100
57	60410	Channahon	IL	0.0 ppt	63/100
58	60447	Minooka	IL	0.0 ppt	—
59	61603	Peoria	IL	0.0 ppt	50/100
60	61614	Peoria	IL	0.0 ppt	50/100
61	61616	Peoria Heights	IL	0.0 ppt	50/100
62	62024	East Alton	IL	0.0 ppt	65/100
63	61201	Rock Island	IL	0.0 ppt	62/100
64	60050	Mchenry	IL	0.0 ppt	53/100
65	61032	Freeport	IL	0.0 ppt	—
66	61604	Peoria	IL	0.0 ppt	44/100
67	62001	Alhambra	IL	0.0 ppt	80/100
68	62061	Marine	IL	0.0 ppt	83/100
69	62074	New Douglas	IL	0.0 ppt	75/100
70	62246	Greenville	IL	0.0 ppt	—
71	62249	Highland	IL	0.0 ppt	75/100
72	62275	Pocahontas	IL	0.0 ppt	—
73	62281	Saint Jacob	IL	0.0 ppt	74/100
74	62284	Smithboro	IL	0.0 ppt	—
75	62294	Troy	IL	0.0 ppt	79/100
76	62301	Quincy	IL	0.0 ppt	64/100
77	62305	Quincy	IL	0.0 ppt	64/100
78	61520	Canton	IL	0.0 ppt	—
79	62254	Lebanon	IL	0.0 ppt	83/100
80	62650	Jacksonville	IL	0.0 ppt	—
81	60013	Cary	IL	0.0 ppt	75/100
82	61072	Rockton	IL	0.0 ppt	48/100
83	62341	Hamilton	IL	0.0 ppt	—
84	62379	Warsaw	IL	0.0 ppt	—
85	62601	Alexander	IL	0.0 ppt	—
86	62638	Franklin	IL	0.0 ppt	—
87	60152	Marengo	IL	0.0 ppt	83/100
88	61071	Rock Falls	IL	0.0 ppt	—
89	62233	Chester	IL	0.0 ppt	83/100
90	62948	Herrin	IL	0.0 ppt	—
91	61535	Groveland	IL	0.0 ppt	—
92	61546	Manito	IL	0.0 ppt	—
93	61554	Pekin	IL	0.0 ppt	—
94	61568	Tremont	IL	0.0 ppt	—
95	62864	Mount Vernon	IL	0.0 ppt	—
96	60177	South Elgin	IL	0.0 ppt	40/100
97	62258	Mascoutah	IL	0.0 ppt	60/100
98	62265	New Baden	IL	0.0 ppt	—
99	62293	Trenton	IL	0.0 ppt	—
100	60445	Midlothian	IL	0.0 ppt	65/100

Methodology

PFAS detection data comes from EPA UCMR5 monitoring, state-level testing programs, and Consumer Confidence Reports. ZIP codes are ranked by maximum PFAS concentration detected. The EPA has set MCLs of 4 ppt for PFOA and PFOS individually. PFAS are persistent chemicals that do not break down in the environment.

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 are PFAS?

PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals used in non-stick coatings, firefighting foam, and food packaging since the 1940s. They are called "forever chemicals" because they do not break down naturally. PFAS are linked to cancer, liver damage, thyroid disease, and immune system suppression.

How can I remove PFAS from my water?

Reverse osmosis (RO) and granular activated carbon (GAC) filters are effective at removing most PFAS from drinking water. NSF/ANSI 53 or 58 certified filters are recommended. Boiling water does NOT remove PFAS.