PFAS in Illinois tap water

27 of 487 tested systems measured above the federal limit. 128 had a detection of any kind.

Every public water system below was required by the EPA to test for 29 PFAS compounds. Sorted by the highest PFOA or PFOS reading, worst first. Find yours for the full set of readings and what removes them.

Water system	Highest PFOA	Highest PFOS	Found	Against the 4 ppt limit
Collinsville, Il	18 ppt	8.9 ppt	8 of 29	Above
East Alton	16 ppt	17 ppt	8 of 29	Above
Freeport	none detected	14 ppt	1 of 29	Above
Galesburg	14 ppt	4.2 ppt	5 of 29	Above
Crest Hill	13.7 ppt	none detected	7 of 29	Above
Abingdon	9.4 ppt	4.8 ppt	5 of 29	Above
New Baden	none detected	9.4 ppt	1 of 29	Above
Prairie Path Water Co. - Whispering Hills	8.3 ppt	none detected	7 of 29	Above
Elburn	7.5 ppt	none detected	1 of 29	Above
Il American-valley View	7.3 ppt	none detected	1 of 29	Above
North Park Pwd	6.2 ppt	7.3 ppt	7 of 29	Above
Freeburg	none detected	7 ppt	1 of 29	Above
Il American-peoria	none detected	6.5 ppt	5 of 29	Above
Channahon	4.6 ppt	5.9 ppt	6 of 29	Above
IL American - Lincoln	5.7 ppt	none detected	5 of 29	Above
South Elgin	5.7 ppt	none detected	5 of 29	Above
Dupo	none detected	5.6 ppt	3 of 29	Above
Dixmoor	4.8 ppt	5.5 ppt	2 of 29	Above
Fox Lake	none detected	5 ppt	2 of 29	Above
Mount Carmel	none detected	4.8 ppt	2 of 29	Above
Robinson-palestine Water Commission	none detected	4.6 ppt	2 of 29	Above
Rock Island Arsenal, US Army	4.6 ppt	none detected	2 of 29	Above
Il American-pekin	none detected	4.4 ppt	7 of 29	Above
Homewood	4.3 ppt	none detected	1 of 29	Above
East Peoria	none detected	4.2 ppt	4 of 29	Above
North East Central Pwd	4.1 ppt	4.1 ppt	4 of 29	Above
Wood River	none detected	4.1 ppt	3 of 29	Above
Holiday Shores Sd	4 ppt	none detected	2 of 29	Within
Abs Water Coop	none detected	none detected	0 of 29	Within
Addison	none detected	none detected	0 of 29	Within
Advocate Christ Medical Center	none detected	none detected	0 of 29	Within
Aledo	none detected	none detected	0 of 29	Within
Alexander Water District	none detected	none detected	1 of 29	Within
Algonquin	none detected	none detected	0 of 29	Within
Alsip	none detected	none detected	0 of 29	Within
Altona	none detected	none detected	0 of 29	Within
American Water Oper and Maintenance, Llc	none detected	none detected	2 of 29	Within
Anna	none detected	none detected	0 of 29	Within
Antioch	none detected	none detected	0 of 29	Within
Aqua Illinois-candlewick Dvn	none detected	none detected	0 of 29	Within
Aqua Illinois-kankakee	none detected	none detected	0 of 29	Within
Aqua Illinois-north Maine Utilities	none detected	none detected	0 of 29	Within
Aqua Illinois-peotone	none detected	none detected	0 of 29	Within
Aqua Illinois-university Park	none detected	none detected	2 of 29	Within
Aqua Illinois-vermilion County	none detected	none detected	1 of 29	Within
Aqua Illinois-willowbrook	none detected	none detected	0 of 29	Within
Arlington Heights	none detected	none detected	0 of 29	Within
Ashkum	none detected	none detected	0 of 29	Within
Athens	none detected	none detected	0 of 29	Within
Auburn, Il	none detected	none detected	0 of 29	Within
Aurora	none detected	none detected	4 of 29	Within
Barrington	none detected	none detected	0 of 29	Within
Bartlett	none detected	none detected	0 of 29	Within
Batavia	none detected	none detected	0 of 29	Within
Beach Park	none detected	none detected	0 of 29	Within
Beardstown	none detected	none detected	0 of 29	Within
Beecher	none detected	none detected	0 of 29	Within
Bellwood	none detected	none detected	0 of 29	Within
Belvidere	none detected	none detected	1 of 29	Within
Bensenville	none detected	none detected	0 of 29	Within
Benton	none detected	none detected	1 of 29	Within
Berkeley	none detected	none detected	0 of 29	Within
Berwyn	none detected	none detected	0 of 29	Within
Bethalto	none detected	none detected	2 of 29	Within
Blandinsville	none detected	none detected	0 of 29	Within
Bloomingdale	none detected	none detected	0 of 29	Within
Bloomington, Il	none detected	none detected	1 of 29	Within
Blue Island	none detected	none detected	0 of 29	Within
Bluffs	none detected	none detected	0 of 29	Within
Bond/madison Water Company	none detected	none detected	3 of 29	Within
Bookwalter Woods MHP	none detected	none detected	0 of 29	Within
Braidwood	none detected	none detected	0 of 29	Within
Breese	none detected	none detected	0 of 29	Within
Bridgeview	none detected	none detected	0 of 29	Within
Brighton	none detected	none detected	3 of 29	Within
Broadview	none detected	none detected	0 of 29	Within
Brookfield	none detected	none detected	0 of 29	Within
Buckley	none detected	none detected	0 of 29	Within
Buda	none detected	none detected	0 of 29	Within
Buffalo Grove	none detected	none detected	0 of 29	Within
Burnham	none detected	none detected	0 of 29	Within
Burr Ridge	none detected	none detected	0 of 29	Within
Bushnell	none detected	none detected	0 of 29	Within
Byron, Il	none detected	none detected	0 of 29	Within
Cahokia Heights	none detected	none detected	3 of 29	Within
Calhoun County Rwd	none detected	none detected	0 of 29	Within
Calumet City	none detected	none detected	2 of 29	Within
Calumet Park	none detected	none detected	0 of 29	Within
Canton, Il	none detected	none detected	3 of 29	Within
Captain James A Lovell Fhcc	none detected	none detected	0 of 29	Within
Carbondale	none detected	none detected	0 of 29	Within
Carlinville	none detected	none detected	0 of 29	Within
Carlyle	none detected	none detected	0 of 29	Within
Carmi	none detected	none detected	0 of 29	Within
Carol Stream	none detected	none detected	1 of 29	Within
Carpentersville	none detected	none detected	0 of 29	Within
Carrollton, Il	none detected	none detected	0 of 29	Within
Carterville	none detected	none detected	1 of 29	Within
Cary	none detected	none detected	5 of 29	Within
Casey	none detected	none detected	0 of 29	Within
Caseyville	none detected	none detected	1 of 29	Within
Caterpillar Trail Pwd	none detected	none detected	0 of 29	Within
Centralia	none detected	none detected	0 of 29	Within
Charleston	none detected	none detected	1 of 29	Within
Chatham	none detected	none detected	0 of 29	Within
Cherry Valley	none detected	none detected	0 of 29	Within
Chester	none detected	none detected	3 of 29	Within
Chicago	none detected	none detected	0 of 29	Within
Chicago Heights	none detected	none detected	0 of 29	Within
Chicago Ridge	none detected	none detected	0 of 29	Within
Chillicothe	none detected	none detected	3 of 29	Within
Cicero	none detected	none detected	0 of 29	Within
Clarendon Hills	none detected	none detected	0 of 29	Within
Clark-edgar Rwd	none detected	none detected	0 of 29	Within
Clear Water Service Corp	none detected	none detected	0 of 29	Within
Clinton	none detected	none detected	0 of 29	Within
Coal City	none detected	none detected	0 of 29	Within
Coal Valley	none detected	none detected	0 of 29	Within
Coal Valley Pwd	none detected	none detected	0 of 29	Within
Columbia	none detected	none detected	2 of 29	Within
Corinth Pwd	none detected	none detected	1 of 29	Within
Cortland	none detected	none detected	0 of 29	Within
Country Club Hills	none detected	none detected	0 of 29	Within
Countryside	none detected	none detected	0 of 29	Within
Crestwood	none detected	none detected	0 of 29	Within
Crete	none detected	none detected	0 of 29	Within
Creve Coeur	none detected	none detected	0 of 29	Within
Crystal Lake	none detected	none detected	2 of 29	Within
Crystal Lawns Addition Improvement Assoc	none detected	none detected	2 of 29	Within
Curran-gardner Township Pwd	none detected	none detected	0 of 29	Within
Dallas Rural Water District	none detected	none detected	0 of 29	Within
Darien	none detected	none detected	0 of 29	Within
De Kalb	none detected	none detected	0 of 29	Within
Decatur	none detected	none detected	0 of 29	Within
Deerfield	none detected	none detected	0 of 29	Within
Des Plaines	none detected	none detected	0 of 29	Within
Dixon	none detected	none detected	0 of 29	Within
Dolton	none detected	none detected	0 of 29	Within
Dover	none detected	none detected	0 of 29	Within
Downers Grove	none detected	none detected	0 of 29	Within
Duquoin	none detected	none detected	1 of 29	Within
Dwight	none detected	none detected	0 of 29	Within
E J Water Coop	none detected	none detected	1 of 29	Within
East Moline	none detected	none detected	2 of 29	Within
Eastern Illinois University	none detected	none detected	0 of 29	Within
Edwardsville	none detected	none detected	1 of 29	Within
Effingham	none detected	none detected	0 of 29	Within
Eisenhower Academy	none detected	none detected	1 of 29	Within
Eldorado	none detected	none detected	0 of 29	Within
Elgin, Il	none detected	none detected	3 of 29	Within
Elk Grove Village	none detected	none detected	0 of 29	Within
Elmhurst	none detected	none detected	1 of 29	Within
Elmwood Park	none detected	none detected	0 of 29	Within
Embarras Area Water District	none detected	none detected	0 of 29	Within
Eureka	none detected	none detected	0 of 29	Within
Evanston	none detected	none detected	0 of 29	Within
Evergreen Park	none detected	none detected	0 of 29	Within
Fairbury	none detected	none detected	0 of 29	Within
Fairfield	none detected	none detected	0 of 29	Within
Fayette Water Company	none detected	none detected	0 of 29	Within
Flora	none detected	none detected	0 of 29	Within
Flossmoor	none detected	none detected	0 of 29	Within
Forest Park	none detected	none detected	0 of 29	Within
Forsyth, Il	none detected	none detected	0 of 29	Within
Fort Massac Pwd	none detected	none detected	0 of 29	Within
Fosterburg Pwd	none detected	none detected	3 of 29	Within
Fountain Water District	none detected	none detected	0 of 29	Within
Fox River Grove	none detected	none detected	4 of 29	Within
Frankfort	none detected	none detected	0 of 29	Within
Franklin Park	none detected	none detected	0 of 29	Within
Fulton	none detected	none detected	1 of 29	Within
Galena	none detected	none detected	0 of 29	Within
Geneseo	none detected	none detected	1 of 29	Within
Geneva	none detected	none detected	0 of 29	Within
Genoa	none detected	none detected	2 of 29	Within
Georgetown	none detected	none detected	0 of 29	Within
Gibson City	none detected	none detected	0 of 29	Within
Gilberts	none detected	none detected	0 of 29	Within
Gillespie	none detected	none detected	0 of 29	Within
Glen Carbon	none detected	none detected	3 of 29	Within
Glen Ellyn	none detected	none detected	0 of 29	Within
Glencoe	none detected	none detected	0 of 29	Within
Glendale Heights	none detected	none detected	0 of 29	Within
Glenview	none detected	none detected	0 of 29	Within
Glenwood	none detected	none detected	0 of 29	Within
Grandwood Park Subdivision - Lake Co Pw	none detected	none detected	0 of 29	Within
Grayslake	none detected	none detected	0 of 29	Within
Great Lakes Naval Training Station	none detected	none detected	0 of 29	Within
Greenville	none detected	none detected	0 of 29	Within
Gurnee	none detected	none detected	0 of 29	Within
Hainesville	none detected	none detected	0 of 29	Within
Hamilton County Water District	none detected	none detected	1 of 29	Within
Hampshire	none detected	none detected	0 of 29	Within
Hanover	none detected	none detected	0 of 29	Within
Hanover Park	none detected	none detected	0 of 29	Within
Harrisburg	none detected	none detected	0 of 29	Within
Harvard	none detected	none detected	0 of 29	Within
Harvey	none detected	none detected	0 of 29	Within
Harwood Heights	none detected	none detected	0 of 29	Within
Havana	none detected	none detected	0 of 29	Within
Hazel Crest	none detected	none detected	0 of 29	Within
Herrin	none detected	none detected	1 of 29	Within
Hickory Hills	none detected	none detected	0 of 29	Within
Highland	none detected	none detected	1 of 29	Within
Highland Park, Il	none detected	none detected	0 of 29	Within
Highwood	none detected	none detected	0 of 29	Within
Hillsboro	none detected	none detected	0 of 29	Within
Hillside	none detected	none detected	0 of 29	Within
Hinsdale	none detected	none detected	0 of 29	Within
Hoffman Estates	none detected	none detected	0 of 29	Within
Hometown	none detected	none detected	0 of 29	Within
Hoopeston	none detected	none detected	0 of 29	Within
Huntley	none detected	none detected	0 of 29	Within
Il American-alton	none detected	none detected	3 of 29	Within
Il American-andalusia	none detected	none detected	0 of 29	Within
Il American-champaign	none detected	none detected	0 of 29	Within
Il American-chicago Suburban	none detected	none detected	0 of 29	Within
Il American-country Club	none detected	none detected	0 of 29	Within
Il American-east St Louis	none detected	none detected	3 of 29	Within
Il American-fernway	none detected	none detected	0 of 29	Within
Il American-granite City	none detected	none detected	3 of 29	Within
Il American-homer Township	none detected	none detected	0 of 29	Within
Il American-liberty Ridge West	none detected	none detected	0 of 29	Within
Il American-pontiac	none detected	none detected	1 of 29	Within
Il American-south Beloit	none detected	none detected	1 of 29	Within
Il American-sterling	none detected	none detected	0 of 29	Within
Il American-streator	none detected	none detected	4 of 29	Within
Il American-west Suburban	none detected	none detected	0 of 29	Within
Illinois State University-normal	none detected	none detected	0 of 29	Within
Island Lake	none detected	none detected	0 of 29	Within
Itasca	none detected	none detected	1 of 29	Within
Jacksonville	none detected	none detected	1 of 29	Within
Jersey Rwc	none detected	none detected	3 of 29	Within
Jerseyville	none detected	none detected	0 of 29	Within
Johnston City	none detected	none detected	1 of 29	Within
Joliet	none detected	none detected	0 of 29	Within
Justice-willow Springs Water Commission	none detected	none detected	0 of 29	Within
Kenilworth	none detected	none detected	0 of 29	Within
Kewanee	none detected	none detected	0 of 29	Within
Kinmundy	none detected	none detected	0 of 29	Within
La Grange	none detected	none detected	0 of 29	Within
La Grange Highlands Sanitary District	none detected	none detected	0 of 29	Within
La Grange Park	none detected	none detected	0 of 29	Within
La Salle	none detected	none detected	2 of 29	Within
Lake Bluff	none detected	none detected	0 of 29	Within
Lake Forest	none detected	none detected	0 of 29	Within
Lake in the Hills	none detected	none detected	0 of 29	Within
Lake of Egypt Pwd	none detected	none detected	0 of 29	Within
Lake Sara Area Water Co-op, Inc.	none detected	none detected	1 of 29	Within
Lake Villa	none detected	none detected	0 of 29	Within
Lake Windermere Estates Subdivision	none detected	none detected	0 of 29	Within
Lake Zurich	none detected	none detected	2 of 29	Within
Lansing	none detected	none detected	0 of 29	Within
Lawrenceville	none detected	none detected	0 of 29	Within
Lcpw - Pekara Subdivision	none detected	none detected	0 of 29	Within
Le Roy	none detected	none detected	0 of 29	Within
Lebanon	none detected	none detected	0 of 29	Within
Lemont	none detected	none detected	0 of 29	Within
Leyden Twsp Water District	none detected	none detected	0 of 29	Within
Libertyville	none detected	none detected	1 of 29	Within
Lincolnshire	none detected	none detected	0 of 29	Within
Lincolnwood	none detected	none detected	0 of 29	Within
Lindenhurst	none detected	none detected	0 of 29	Within
Lisle	none detected	none detected	0 of 29	Within
Litchfield	none detected	none detected	0 of 29	Within
Lockport	none detected	none detected	4 of 29	Within
Lombard	none detected	none detected	0 of 29	Within
Long Creek Township PWS	none detected	none detected	0 of 29	Within
Loves Park	none detected	none detected	0 of 29	Within
Low Point Water District	none detected	none detected	0 of 29	Within
Lutheran General Hospital	none detected	none detected	0 of 29	Within
Lynwood	none detected	none detected	0 of 29	Within
Lyons, Il	none detected	none detected	0 of 29	Within
Mackinaw	none detected	none detected	0 of 29	Within
Macomb	none detected	none detected	0 of 29	Within
Mahomet	none detected	none detected	0 of 29	Within
Manhattan	none detected	none detected	0 of 29	Within
Marengo	none detected	none detected	1 of 29	Within
Marion	none detected	none detected	1 of 29	Within
Markham	none detected	none detected	1 of 29	Within
Marseilles	none detected	none detected	0 of 29	Within
Marshall	none detected	none detected	0 of 29	Within
Maryville	none detected	none detected	0 of 29	Within
Mascoutah	none detected	none detected	0 of 29	Within
Matteson	none detected	none detected	0 of 29	Within
Mattoon	none detected	none detected	1 of 29	Within
Maywood	none detected	none detected	0 of 29	Within
Mchenry	none detected	none detected	1 of 29	Within
Melrose Park	none detected	none detected	0 of 29	Within
Mendon	none detected	none detected	0 of 29	Within
Mendota	none detected	none detected	0 of 29	Within
Metamora	none detected	none detected	0 of 29	Within
Metropolis	none detected	none detected	0 of 29	Within
Midlothian	none detected	none detected	0 of 29	Within
Milan	none detected	none detected	0 of 29	Within
Mill Creek Pwd	none detected	none detected	0 of 29	Within
Mill Creek Water Reclamation District	none detected	none detected	0 of 29	Within
Millstadt	none detected	none detected	4 of 29	Within
Millstone Pwd	none detected	none detected	0 of 29	Within
Minooka	none detected	none detected	1 of 29	Within
Mitchell Pwd	none detected	none detected	4 of 29	Within
Mokena	none detected	none detected	0 of 29	Within
Moline	none detected	none detected	1 of 29	Within
Monee	none detected	none detected	0 of 29	Within
Monmouth	none detected	none detected	0 of 29	Within
Montgomery	none detected	none detected	0 of 29	Within
Monticello	none detected	none detected	0 of 29	Within
Moro Pwd	none detected	none detected	3 of 29	Within
Morris, Il	none detected	none detected	0 of 29	Within
Morrison	none detected	none detected	0 of 29	Within
Morton	none detected	none detected	0 of 29	Within
Morton Grove	none detected	none detected	0 of 29	Within
Mount Olive	none detected	none detected	0 of 29	Within
Mount Prospect	none detected	none detected	0 of 29	Within
Mount Vernon	none detected	none detected	1 of 29	Within
Mount Zion	none detected	none detected	1 of 29	Within
Mundelein	none detected	none detected	0 of 29	Within
Murdale Pwd	none detected	none detected	0 of 29	Within
Murphysboro	none detected	none detected	1 of 29	Within
Naperville	none detected	none detected	0 of 29	Within
Nashville	none detected	none detected	0 of 29	Within
New Lenox	none detected	none detected	0 of 29	Within
Niles, Il	none detected	none detected	0 of 29	Within
Normal	none detected	none detected	0 of 29	Within
Norridge	none detected	none detected	0 of 29	Within
North Aurora	none detected	none detected	0 of 29	Within
North Chicago	none detected	none detected	0 of 29	Within
North East Marion County Water Cmpny	none detected	none detected	0 of 29	Within
North Riverside	none detected	none detected	0 of 29	Within
North Tazewell Pwd	none detected	none detected	0 of 29	Within
Northbrook	none detected	none detected	0 of 29	Within
Northeast Mount Vernon Water Company	none detected	none detected	1 of 29	Within
Northern Illinois University-dekalb	none detected	none detected	0 of 29	Within
Northfield, Il	none detected	none detected	0 of 29	Within
Northlake	none detected	none detected	0 of 29	Within
Northshore Univ Glenbrook	none detected	none detected	0 of 29	Within
Northshore University Evanston	none detected	none detected	0 of 29	Within
O Fallon	none detected	none detected	1 of 29	Within
Oak Brook	none detected	none detected	0 of 29	Within
Oak Forest	none detected	none detected	1 of 29	Within
Oak Lawn	none detected	none detected	0 of 29	Within
Oak Park, Il	none detected	none detected	0 of 29	Within
Oglesby	none detected	none detected	0 of 29	Within
Olney	none detected	none detected	0 of 29	Within
Olympia Fields	none detected	none detected	0 of 29	Within
Oregon	none detected	none detected	0 of 29	Within
Orland Park	none detected	none detected	0 of 29	Within
Oswego	none detected	none detected	0 of 29	Within
Ottawa	none detected	none detected	0 of 29	Within
Palatine	none detected	none detected	0 of 29	Within
Palos Heights	none detected	none detected	0 of 29	Within
Palos Hills	none detected	none detected	0 of 29	Within
Palos Park	none detected	none detected	0 of 29	Within
Pana	none detected	none detected	1 of 29	Within
Paris	none detected	none detected	0 of 29	Within
Park City	none detected	none detected	0 of 29	Within
Park Forest	none detected	none detected	0 of 29	Within
Park Ridge	none detected	none detected	0 of 29	Within
Paxton	none detected	none detected	0 of 29	Within
Peoria Heights	none detected	none detected	5 of 29	Within
Peru	none detected	none detected	0 of 29	Within
Petersburg	none detected	none detected	0 of 29	Within
Pike County Pwd 1	none detected	none detected	0 of 29	Within
Pinckneyville	none detected	none detected	0 of 29	Within
Pingree Grove	none detected	none detected	0 of 29	Within
Pittsfield	none detected	none detected	0 of 29	Within
Plainfield	none detected	none detected	0 of 29	Within
Plano	none detected	none detected	0 of 29	Within
Pleasant Valley Pwd	none detected	none detected	3 of 29	Within
Pontoon Beach Pwd	none detected	none detected	3 of 29	Within
Poplar Grove West-countryside	none detected	none detected	0 of 29	Within
Posen	none detected	none detected	0 of 29	Within
Prairie Path Water Co. - Clarendon	none detected	none detected	0 of 29	Within
Prairie Path Water Co. - Lake Holiday	none detected	none detected	0 of 29	Within
Princeton	none detected	none detected	0 of 29	Within
Quincy	none detected	none detected	2 of 29	Within
Raccoon Water Company	none detected	none detected	0 of 29	Within
Rantoul	none detected	none detected	0 of 29	Within
Red Bud	none detected	none detected	0 of 29	Within
Richton Park	none detected	none detected	0 of 29	Within
River Forest	none detected	none detected	0 of 29	Within
River Grove	none detected	none detected	0 of 29	Within
Riverdale	none detected	none detected	0 of 29	Within
Riverside	none detected	none detected	0 of 29	Within
Riverton	none detected	none detected	0 of 29	Within
Riverwoods	none detected	none detected	0 of 29	Within
Robbins	none detected	none detected	0 of 29	Within
Rochelle	none detected	none detected	0 of 29	Within
Rochester	none detected	none detected	0 of 29	Within
Rock Falls	none detected	none detected	1 of 29	Within
Rock Island	none detected	none detected	1 of 29	Within
Rockford, Il	none detected	none detected	2 of 29	Within
Rockton	none detected	none detected	1 of 29	Within
Rolling Meadows	none detected	none detected	0 of 29	Within
Romeoville	none detected	none detected	3 of 29	Within
Roselle	none detected	none detected	0 of 29	Within
Rosemont	none detected	none detected	0 of 29	Within
Round Lake	none detected	none detected	0 of 29	Within
Round Lake Beach	none detected	none detected	0 of 29	Within
Round Lake Park	none detected	none detected	0 of 29	Within
Salem	none detected	none detected	0 of 29	Within
Saline Valley Conservancy District	none detected	none detected	0 of 29	Within
Sandwich	none detected	none detected	0 of 29	Within
Sangamon Valley Pwd	none detected	none detected	0 of 29	Within
Sauk	none detected	none detected	1 of 29	Within
Schaumburg	none detected	none detected	0 of 29	Within
Schiller Park	none detected	none detected	0 of 29	Within
Shady Oaks MHP	none detected	none detected	0 of 29	Within
Shelbyville	none detected	none detected	0 of 29	Within
Sherrard Jr/sr High School	none detected	none detected	0 of 29	Within
Shorewood, Il	none detected	none detected	1 of 29	Within
Silvis	none detected	none detected	0 of 29	Within
Skokie	none detected	none detected	0 of 29	Within
South Chicago Heights	none detected	none detected	0 of 29	Within
South Highway Pwd	none detected	none detected	0 of 29	Within
South Holland	none detected	none detected	1 of 29	Within
South Jacksonville	none detected	none detected	3 of 29	Within
South Stickny Sd	none detected	none detected	0 of 29	Within
Southeast Regional Water Facility	none detected	none detected	0 of 29	Within
Southern Il University-edwardsville	none detected	none detected	2 of 29	Within
Sparta	none detected	none detected	1 of 29	Within
Spring Valley	none detected	none detected	0 of 29	Within
Springfield, Il	none detected	none detected	1 of 29	Within
St Charles	none detected	none detected	3 of 29	Within
Staunton	none detected	none detected	1 of 29	Within
Steger	none detected	none detected	0 of 29	Within
Stickney	none detected	none detected	0 of 29	Within
Stone Park	none detected	none detected	0 of 29	Within
Streamwood	none detected	none detected	0 of 29	Within
Sugar Grove	none detected	none detected	1 of 29	Within
Sullivan	none detected	none detected	0 of 29	Within
Summit	none detected	none detected	1 of 29	Within
Sycamore	none detected	none detected	0 of 29	Within
Taylorville	none detected	none detected	0 of 29	Within
Tinley Park	none detected	none detected	0 of 29	Within
Tritownship Water District	none detected	none detected	0 of 29	Within
Troy, Il	none detected	none detected	1 of 29	Within
Tuscola	none detected	none detected	0 of 29	Within
U of I Chicago Medical Center	none detected	none detected	0 of 29	Within
U of I-champaign	none detected	none detected	0 of 29	Within
Utl Inc-galena Territory	none detected	none detected	0 of 29	Within
Valmeyer	none detected	none detected	0 of 29	Within
Vandalia	none detected	none detected	0 of 29	Within
Vandalia Correctional Center	none detected	none detected	0 of 29	Within
Vernon Hills - Lake Co Pw	none detected	none detected	0 of 29	Within
Villa Park	none detected	none detected	0 of 29	Within
Virden	none detected	none detected	0 of 29	Within
Volo	none detected	none detected	0 of 29	Within
Warrenville	none detected	none detected	0 of 29	Within
Wasco Sd	none detected	none detected	0 of 29	Within
Washington County Water Company	none detected	none detected	1 of 29	Within
Washington, Il	none detected	none detected	0 of 29	Within
Waterloo	none detected	none detected	2 of 29	Within
Watseka	none detected	none detected	0 of 29	Within
Wauconda	none detected	none detected	0 of 29	Within
Waukegan	none detected	none detected	0 of 29	Within
Wee-ma-tuk Water District	none detected	none detected	3 of 29	Within
West Chicago	none detected	none detected	0 of 29	Within
West Dundee	none detected	none detected	0 of 29	Within
West Frankfort	none detected	none detected	0 of 29	Within
West Liberty-dundas Water District	none detected	none detected	0 of 29	Within
Westchester	none detected	none detected	0 of 29	Within
Western Illinois University	none detected	none detected	0 of 29	Within
Western Springs	none detected	none detected	0 of 29	Within
Westmont	none detected	none detected	0 of 29	Within
Westville	none detected	none detected	0 of 29	Within
Wheaton	none detected	none detected	0 of 29	Within
Wheeling	none detected	none detected	0 of 29	Within
Wildwood Subdivision - Lake Co Pw	none detected	none detected	0 of 29	Within
Williamsville	none detected	none detected	0 of 29	Within
Willow Lake Estates MHP	none detected	none detected	3 of 29	Within
Willowbrook	none detected	none detected	0 of 29	Within
Wilmette	none detected	none detected	0 of 29	Within
Wilmington	none detected	none detected	4 of 29	Within
Winfield	none detected	none detected	0 of 29	Within
Winnetka	none detected	none detected	0 of 29	Within
Winthrop Harbor	none detected	none detected	0 of 29	Within
Wonder Lake	none detected	none detected	0 of 29	Within
Wood Dale	none detected	none detected	0 of 29	Within
Woodhaven, Il	none detected	none detected	0 of 29	Within
Woodlawn	none detected	none detected	1 of 29	Within
Woodridge	none detected	none detected	0 of 29	Within
Woodstock, Il	none detected	none detected	0 of 29	Within
Worth	none detected	none detected	0 of 29	Within
Xenia	none detected	none detected	0 of 29	Within
Yorkville	none detected	none detected	0 of 29	Within
Zion	none detected	none detected	0 of 29	Within

All 487 systems the EPA tested in Illinois, every one of them with its own page. Each was tested for 29 PFAS compounds.

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Source, the EPA’s fifth Unregulated Contaminant Monitoring Rule, final dataset published 2026-10-15. Original data →