Illinois

1,750 Utilities
Serving: 13,079,000
Data available: 2012-2017
Contaminants Found: 85

EWG's drinking water quality report for Illinois shows results of tests conducted by the water utilities in Illinois and provided to EWG by the Illinois Environmental Protection Agency.

LARGE UTILITIES

ALL UTILITIES WITH VIOLATIONS

LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Illinois serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.

Large utilities in Illinois

Utility	Location	People Served
Addison	Addison, IL	38,090
Algonquin	Algonquin, IL	33,000
Alsip	Alsip, IL	20,500
Antioch	Antioch, IL	13,724
Aqua Illinois - Kankakee	Kankakee, IL	76,299
Aqua Illinois-Vermilion County	Danville, IL	38,000
Arlington Heights	Arlington Heights, IL	76,943
Aurora	Aurora, IL	171,000
Barrington	Barrington, IL	10,168
Bartlett	Bartlett, IL	41,442
Batavia	Batavia, IL	26,348
Bellwood	Bellwood, IL	20,535
Belvidere	Belvidere, IL	23,500
Bensenville	Bensenville, IL	20,703
Berwyn	Berwyn, IL	55,000
Bethalto	Bethalto, IL	17,500
Bloomingdale	Bloomingdale, IL	21,675
Bloomington	Bloomington, IL	75,975
Blue Island	Blue Island, IL	23,463
Bridgeview	Bridgeview, IL	15,500
Brookfield	Brookfield, IL	19,085
Buffalo Grove	Buffalo Grove, IL	44,411
Burr Ridge	Burr Ridge, IL	11,259
Calumet City	Calumet City, IL	39,071
Canton	Canton, IL	13,932
Carbondale	Carbondale, IL	25,597
Carol Stream	Carol Stream, IL	40,438
Carpentersville	Carpentersville, IL	30,586
Cary	Cary, IL	18,713
Caseyville	Caseyville, IL	12,337

Utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 in Illinois

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

Utility	Location	People Served	Violation Points
Triangle Mobile Home Park	Allegan, IL	90	107
Lynwood 3rd Addition	Geneseo, IL	90	100
Fox Lawn Utilities Company Inc.	Yorkville, IL	273	87
Sparta	Sparta, IL	4,853	76
Fountain Valley Mobile Home Park	Rantoul, IL	375	74
New Salem Public Water District	Adair, IL	225	70
Egyptian Water Company	Steelville, IL	1,695	55
Chesterfield	Chesterfield, IL	180	52
Central Macoupin County Rural Water District	Jerseyville, IL	1,825	45
Carlinville	Carlinville, IL	5,685	41
Rochelle	Rochelle, IL	9,850	40
Lake Williamson Christian Center	Carlinville, IL	1,250	40
Cutler	Cutler, IL	550	39
Atlanta	Atlanta, IL	1,649	37
De Land	Deland, IL	475	30
Valley View Subdivision (woodford)	East Peoria, IL	100	29
Criswell Court Mobile Home Park	Joliet, IL	148	28
Holiday Shores SD	Edwardsville, IL	3,387	28
Country Acres Mobile Home Park (la Salle County)	Des Plaines, IL	295	26
Lemont	Lemont, IL	13,098	26
Scottville Rural Water Company Inc.	Palmyra, IL	850	22
Millstadt	Millstadt, IL	4,380	22
Colonial Meadows Water Company	Bloomington, IL	190	22
Robbins	Robbins, IL	6,635	21
Morton	Morton, IL	17,000	21
Eastmoreland Water Service Association	Joliet, IL	663	21
Shawnee Valley Public Water District	Wolf Lake, IL	952	20
Tritownship Water District	Highland, IL	3,620	18
Golconda	Golconda, IL	672	17
Palmyra	Palmyra, IL	850	17

Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 in Illinois

Utility	Location	People Served	Violation Points
Lemont	Lemont, IL	13,098	26
Morton	Morton, IL	17,000	21
IL American-Streator	Creve Coeur, IL	19,000	11
Carbondale	Carbondale, IL	25,597	10
Crest Hill	Crest Hill, IL	14,889	9
Oswego	Oswego, IL	25,855	8
E J Water Corp	Dieterich, IL	12,896	7
Lockport	Lockport, IL	24,466	5
Chicago Heights	Chicago Heights, IL	33,072	4
Downers Grove	Downers Grove, IL	50,616	4
Brookfield	Brookfield, IL	19,085	4
Calumet City	Calumet City, IL	39,071	4
Gurnee	Gurnee, IL	31,000	3
Lindenhurst	Lindenhurst, IL	14,632	3
East Moline	East Moline, IL	20,500	2
Mount Prospect	Mt Prospect, IL	40,904	2
De Kalb	Dekalb, IL	41,000	2
Belvidere	Belvidere, IL	23,500	1
Romeoville	Romeoville, IL	50,001	1
IL American - Homer Township	Creve Coeur, IL	18,870	1
Crestwood	Crestwood, IL	10,823	1
Wheeling	Wheeling, IL	36,944	1
Troy	Troy, IL	15,000	1
Orland Park	Orland Park, IL	55,603	1
Hanover Park	Hanover Park, IL	38,278	1
Forest Park	Forest Park, IL	15,688	1
Rantoul	Rantoul, IL	13,000	1
Des Plaines	Des Plaines, IL	58,710	1
Shorewood	Shorewood, IL	15,783	1
Oak Forest	Oak Forest, IL	28,051	1

Contaminants found in Illinois above health guidelines

	Found above health guidelines			Found
Contaminant	# of Utilities	People Served		# of Utilities	People Served
Total trihalomethanes (TTHMs)		1,575	12,809,009			1,575	12,809,009
Chloroform		1,469	12,602,575			1,498	12,687,640
Bromodichloromethane		1,355	12,591,613			1,355	12,591,613
Dibromochloromethane		1,267	12,182,916			1,276	12,431,028
Trichloroacetic acid		1,061	11,667,286			1,109	11,930,060
Dichloroacetic acid		1,151	11,573,010			1,204	12,063,208
Radium, combined (-226 & -228)		1,454	11,504,893			1,319	9,628,413
Nitrate		911	10,797,239			1,137	9,863,400
Chromium (hexavalent)		565	10,638,231			543	10,892,576
Nitrate and nitrite		762	9,484,022			845	8,515,881
Arsenic		843	3,313,777			785	3,231,725
Bromoform		458	1,919,139			595	3,612,445
Atrazine		188	545,483			186	798,330
Chlorate		61	460,854			229	3,627,881
Chlorite		104	381,170			85	360,038
1,4-Dioxane		22	364,170			130	2,490,199
Manganese		68	258,221			848	2,802,732
Bromate		19	241,126			18	238,126
Strontium		11	232,283			539	11,412,776
Tetrachloroethylene (perchloroethylene)		10	231,280			11	232,000
Simazine		81	213,706			99	242,508
Perfluorooctanoic acid (PFOA)		18	153,012			18	153,012
Carbon tetrachloride		16	105,939			8	249,625
Barium		34	77,878			1,443	10,242,686
Trichloroethylene		4	37,671			8	217,094
Benzo[a]pyrene		4	37,451			5	50,160
Cadmium		4	33,236			4	33,236
Perfluorooctane sulfonate (PFOS)		2	27,393			2	27,393
Uranium		5	27,383			28	67,461
Perfluorohexane sulfonate (PFHXS)		2	24,375			2	24,375
Thallium		3	12,183			3	12,183
Tritium		2	6,472			2	6,472
Molybdenum		2	5,705			411	10,758,715
Aluminum		1	5,614			2	12,364
Antimony		1	660			2	1,564
Selenium		1	221			138	585,364
Styrene		1	120			2	576

Contaminants found in Illinois above legal limits

Contaminant	People Served
Radium, combined (-226 & -228)	8	5,575
Arsenic	8	4,297
Total trihalomethanes (TTHMs)	2	681
Barium	1	225

Illinois

1,750 Utilities

Serving: 13,079,000

Data available: 2012-2017

Contaminants Found: 85

Large utilities in Illinois

Utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 in Illinois

Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 in Illinois

Contaminants found in Illinois above health guidelines

Contaminants found in Illinois above legal limits