Cook, IL

Compiled by PlainEnviro · August 25, 2026

High Risk (94/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.

Environmental data for Cook in Illinois · Population: 5,185,812

TRI sites such as Wieland Metals Inc; Cleveland-Cliffs Riverdale LLC; Envirite of Illinois Inc; SDWIS systems such as CHICAGO; ELGIN; CICERO; NPL sites such as Acme Steel Coke Plant; Estech General Chemical Company; Lake Calumet Cluster anchor Cook, IL's EPA extract. Derived burden score 94/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in Cook include CHICAGO; CICERO; AQUA ILLINOIS-KANKAKEE, while Wieland Metals Inc leads reported TRI pounds among local Form R filers. AQS median AQI 54 / peak 166 in 2024.

Burden score 94/100 (High Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Cook -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

Same facilities, both years

-3.9%

295 facilities that filed in 2022 and 2023

Whole inventory

-3.8%

15.2 million lb → 14.6 million lb, every facility that filed

Between the two reporting years, 10 facilities filed for the first time and 12 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.

Cook, IL's total reported releases fell from 15.2 million lb in 2022 to 14.6 million lb in 2023, based on EPA TRI filings.
Cook, IL's water releases fell from 659 lb in 2022 to 347 lb in 2023, based on EPA TRI filings.
Cook, IL's air releases fell from 2.6 million lb in 2022 to 2.3 million lb in 2023, based on EPA TRI filings.
Cook, IL's land releases rose from 987 lb in 2022 to 1.0 thousand lb in 2023, based on EPA TRI filings.

County population (Census ACS)

5,185,812

TRI Facilities

Water Systems

235

Superfund Sites

Total Releases

64.6M lbs

Air Quality History (2020–2024)

EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.

Year	Good	Moderate	Unhealthy (SG)	Unhealthy	Median AQI	Max AQI
2024	131 (36%)	224	10	1	54	166
2023	104 (28%)	227	27	7	57	223
2022	117 (32%)	240	7	1	54	151
2021	87 (24%)	257	20	1	59	156
2020	86 (23%)	260	16	4	58	164

2024 Good Air Quality: 36% of days

Unhealthy days: 11

Median AQI: 54

Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)

For real-time air quality readings and pollutant breakdowns in Illinois, see the EPA's AirNow.gov.

Water Systems (235)

System	City	Source	System pop (SDWIS)	Violations	Health
CHICAGO	Chicago	Surface Water	2,721,308	1	Yes
ELGIN	Elgin	Surface Water	114,797	0	–
CICERO	Cicero	Surface Water	83,000	2	Yes
AQUA ILLINOIS-KANKAKEE	Glenview	Surface Water	80,000	4	Yes
SCHAUMBURG	Schaumburg	Surface Water	75,750	0	–
EVANSTON	Evanston	Surface Water	74,486	1	Yes
ARLINGTON HEIGHTS	Arlington Heights	Surface Water	73,320	0	–
PALATINE	Palatine	Surface Water	70,875	2	Yes
SKOKIE	Skokie	Surface Water	66,422	0	–
DES PLAINES	Des Plaines	Surface Water	60,675	0	–
OAK LAWN	Oak Lawn	Surface Water	58,362	2	Yes
ORLAND PARK	Orland Park	Surface Water	58,020	0	–
BERWYN	Berwyn	Surface Water	57,250	3	Yes
TINLEY PARK	Tinley Park	Surface Water	56,703	0	–
OAK PARK	Oak Park	Surface Water	54,583	2	Yes
HOFFMAN ESTATES	Hoffman Estates	Surface Water	50,179	0	–
GLENVIEW	Glenview	Surface Water	47,856	2	Yes
MOUNT PROSPECT	Mount Prospect	Surface Water	41,000	0	–
PARK RIDGE	Park Ridge	Surface Water	39,800	1	Yes
WHEELING	Wheeling	Surface Water	39,725	2	Yes
STREAMWOOD	Streamwood	Surface Water	39,577	0	–
CALUMET CITY	Calumet City	Surface Water	37,000	2	Yes
NORTHBROOK	Northbrook	Surface Water	34,407	1	Yes
ELK GROVE VILLAGE	Elk Grove Village	Surface Water	31,802	0	–
AQUA ILLINOIS-VERMILION COUNTY	Glenview	Surface Water	30,106	1	Yes
AQUA ILLINOIS-NORTH MAINE UTILITIES	Glenview	Surface Water	30,043	2	Yes
SOUTH STICKNY SD	Burbank	Surface Water	30,000	1	Yes
NILES	Niles	Surface Water	29,350	0	–
LANSING	Lansing	Surface Water	29,076	0	–
OAK FOREST	Oak Forest	Surface Water	27,478	0	–
WILMETTE	Wilmette	Surface Water	27,087	0	–
CHICAGO HEIGHTS	Chicago Heights	Surface Water	26,184	0	–
MORTON GROVE	Morton Grove	Surface Water	25,297	2	Yes
ELMWOOD PARK	Elmwood Park	Surface Water	25,000	1	Yes
HARVEY	Harvey	Surface Water	25,000	0	–
MELROSE PARK	Melrose Park	Surface Water	24,206	1	Yes
MAYWOOD	Maywood	Surface Water	24,090	2	Yes
ROLLING MEADOWS	Rolling Meadows	Surface Water	23,329	0	–
SOUTH HOLLAND	South Holland	Surface Water	22,000	8	Yes
PARK FOREST	Park Forest	Groundwater	21,687	2	Yes
BLUE ISLAND	Blue Island	Surface Water	21,494	1	Yes
DOLTON	Dolton	Surface Water	20,510	0	–
EVERGREEN PARK	Evergreen Park	Surface Water	19,943	0	–
HOMEWOOD	Homewood	Surface Water	19,463	2	Yes
BELLWOOD	Bellwood	Surface Water	19,156	3	Yes
ALSIP	Alsip	Surface Water	19,063	0	–
BROOKFIELD	Brookfield	Surface Water	18,776	0	–
PALOS HILLS	Palos Hills	Surface Water	18,530	0	–
FRANKLIN PARK	Franklin Park	Surface Water	18,467	0	–
JUSTICE-WILLOW SPRINGS WATER COMMISSION	Justice	Surface Water	18,450	0	–
MATTESON	Matteson	Surface Water	18,293	0	–
LEMONT	Lemont	Groundwater	17,500	11	Yes
COUNTRY CLUB HILLS	Country Club Hills	Surface Water	16,500	0	–
BRIDGEVIEW	Bridgeview	Surface Water	16,467	0	–
WESTCHESTER	Westchester	Surface Water	16,241	2	Yes
LA GRANGE	La Grange	Surface Water	16,200	0	–
PALOS HEIGHTS	Palos Heights	Surface Water	15,500	0	–
NORRIDGE	Norridge	Surface Water	15,251	0	–
MIDLOTHIAN	Midlothian	Surface Water	14,819	1	Yes
HICKORY HILLS	Hickory Hills	Surface Water	14,505	0	–
FOREST PARK	Forest Park	Surface Water	14,340	0	–
CHICAGO RIDGE	Chicago Ridge	Surface Water	14,130	0	–
HAZEL CREST	Hazel Crest	Surface Water	13,792	1	Yes
LINCOLNWOOD	Lincolonwood	Surface Water	13,463	1	Yes
WESTERN SPRINGS	Western Springs	Groundwater	13,274	1	Yes
LA GRANGE PARK	Lagrange Park	Surface Water	13,011	1	Yes
NORTHLAKE	North Lake	Surface Water	12,840	0	–
RICHTON PARK	Richton Park	Groundwater	12,504	3	Yes
MARKHAM	Markham	Surface Water	12,500	0	–
WINNETKA	Winnetka	Surface Water	12,475	0	–
RIVER FOREST	River Forest	Surface Water	11,717	1	Yes
SCHILLER PARK	Schiller Park	Surface Water	11,709	3	Yes
SUMMIT	Summit	Surface Water	11,161	0	–
WORTH	Worth	Surface Water	10,970	1	Yes
CRESTWOOD	Crestwood	Surface Water	10,826	0	–
BARRINGTON	Barrington	Groundwater	10,327	1	Yes
LYONS	Lyons	Surface Water	10,304	4	Yes
RIVER GROVE	River Grove	Surface Water	10,282	1	Yes
RIVERDALE	Riverdale	Surface Water	10,266	3	Yes
LEYDEN TWSP WATER DISTRICT	Franklin Park	Surface Water	10,000	0	–
SAUK	Sauk Village	Groundwater	9,921	0	–
FLOSSMOOR	Flossmoor	Surface Water	9,371	0	–
RIVERSIDE	Riverside	Surface Water	9,298	4	Yes
LYNWOOD	Lynwood	Surface Water	9,149	0	–
HARWOOD HEIGHTS	Hardwood Heights	Surface Water	9,065	1	Yes
GLENWOOD	Glenwood	Surface Water	8,956	0	–
GLENCOE	Glencoe	Surface Water	8,849	0	–
CALUMET PARK	Calumet Park	Surface Water	8,442	1	Yes
HILLSIDE	Hillside	Surface Water	8,200	0	–
BROADVIEW	Broadview	Surface Water	7,847	3	Yes
NORTH RIVERSIDE	North Riverside	Surface Water	7,071	4	Yes
AQUA ILLINOIS-UNIVERSITY PARK	Glenview	Surface Water	7,002	4	Yes
STICKNEY	Stickney	Surface Water	6,902	1	Yes
LA GRANGE HIGHLANDS SANITARY DISTRICT	Lagrange	Surface Water	6,600	0	–
AQUA ILLINOIS-CANDLEWICK DVN	Glenview	Groundwater	6,426	0	–
COUNTRYSIDE	Countryside	Surface Water	6,420	0	–
NORTHFIELD	Northfield	Surface Water	5,470	1	Yes
ROBBINS	Robbins	Surface Water	5,415	0	–
AQUA ILLINOIS-OAK BROOK	Glenview	Surface Water	5,361	0	–
POSEN	Posen	Surface Water	5,331	2	Yes
BERKELEY	Berkeley	Surface Water	5,214	1	Yes
AQUA ILLINOIS-WILLOWBROOK	Glenview	Groundwater	5,100	0	–
OLYMPIA FIELDS	Olympia Fields	Surface Water	4,922	0	–
PALOS PARK	Palos Park	Surface Water	4,873	0	–
HOMETOWN	Hometown	Surface Water	4,240	0	–
AQUA ILLINOIS-PEOTONE	Glenview	Surface Water	4,182	0	–
BURNHAM	Burnham	Surface Water	3,989	1	Yes
ROSEMONT	Rosemont	Surface Water	3,952	0	–
SOUTH CHICAGO HEIGHTS	South Chicago Heights	Surface Water	3,924	1	Yes
INDIAN HEAD PARK	Indian Head Park	Surface Water	3,240	0	–
AQUA ILLINOIS-HAWTHORN WOODS	Glenview	Groundwater	3,065	2	Yes
OASIS MHP	Northbrook	Groundwater	3,000	0	–
DIXMOOR	Dixmoor	Surface Water	2,973	3	Yes
SOUTH PALOS TWSP SANITARY DIST	Palos Park	Surface Water	2,800	1	Yes
KENILWORTH	Kenilworth	Surface Water	2,514	0	–
PARADISE VILLAGE	Skokie	Groundwater	2,456	0	–
CENTRAL STICKNEY SD	Burbank	Surface Water	2,400	1	Yes
THORNTON	Thornton	Surface Water	2,386	0	–
AQUA ILLINOIS-TIMBER RIDGE	Glenview	Groundwater	2,322	0	–
LAKE BARRINGTON SHORES SUBDIVSION	Lake Barrington	Groundwater	2,300	3	Yes
PROSPECT HEIGHTS	Prospect Heights	Surface Water	2,280	1	Yes
PHOENIX	Phoenix	Surface Water	1,994	4	Yes
MERRIONETTE PARK	Merrionette Park	Surface Water	1,969	0	–
AQUA ILLINOIS-OAK RUN	Glenview	Groundwater	1,885	0	–
AQUA ILLINOIS-MCHENRY SHORES	Glenview	Groundwater	1,862	0	–
FORD HEIGHTS	Ford Heights	Surface Water	1,813	4	Yes
AQUA ILLINOIS-ROCKWELL	Glenview	Groundwater	1,762	0	–
EAST HAZEL CREST	East Hazel Crest	Surface Water	1,500	2	Yes
HODGKINS	Hodgkins	Surface Water	1,472	0	–
GARDEN HOME SD	Garden Homes	Surface Water	1,472	0	–
SUNSET MHP	Northbrook	Surface Water	1,400	0	–
AQUA ILLINOIS-PHILO	Glenview	Groundwater	1,378	0	–
ROCK SPRINGS MHP	Skokie	Groundwater	1,338	0	–
CASA VERDE MANUFACTURED HOME COMMUNITY	Skokie	Groundwater	1,250	0	–
BLACKHAWK ESTATES LLC	Chicago	Groundwater	1,238	3	Yes
AQUA ILLINOIS-SKYLINE (NORTHERN)	Glenview	Groundwater	1,200	0	–
HARBOR POINT ESTATES MHP	Northbrook	Surface Water	1,064	0	–
FEATHEROCK MHP	Chicago	Surface Water	1,044	0	–
OAKBROOK ESTATES MHP	Northbrook	Groundwater	1,012	0	–
SPRING LAKES MHP	Elgin	Surface Water	940	0	–
AQUA ILLINOIS-MOECHERVILLE	Glenview	Groundwater	920	0	–
SHADY OAKS MHP	Chicago	Groundwater	912	0	–
WILLOWAY TERRACE MHP	Chicago	Groundwater	900	0	–
AQUA ILLINOIS-CRYSTAL CLEAR WATER CO.	Glenview	Groundwater	855	0	–
GLENBROOK SD	Techny	Surface Water	822	1	Yes
FOREST VIEW	Forest View	Surface Water	800	0	–
AQUA ILLINOIS-VILLAGE WOODS	Glenview	Groundwater	800	0	–
WHISPERING PINES MHP	Chicago	Groundwater	760	1	Yes
SUNNY ACRES MHP	Chicago	Groundwater	750	0	–
AQUA ILLINOIS-EASTWOOD MANOR	Glenview	Groundwater	728	4	Yes
CAMBRIDGE COURTS MHP	Northbrook	Surface Water	658	0	–
AQUA ILLINOIS-IVANHOE	Glenview	Groundwater	650	1	Yes
BEDFORD PARK	Bedford Park	Surface Water	602	0	–
PARADISE POINT SUBDIVISION	Chicago	Surface Water	528	0	–
FRANCISCAN SISTERS OF CHICAGO	Lemont	Groundwater	505	0	–
Oronoco Estates MHC	Chicago	Groundwater	505	0	–
SHORELINE TRC MHP	Chicago	Surface Water	504	0	–
LAKE BARRINGTON	Lake Barrington	Groundwater	500	0	–
AQUA ILLINOIS-SUN RIVER TERRACE	Glenview	Groundwater	498	1	Yes
GOLF	Golf	Surface Water	497	0	–
AQUA ILLINOIS-NUNDA	Glenview	Groundwater	485	1	Yes
GRAND ISLAND RESORT MHP (2 WPS)	Chicago	Groundwater	480	0	–
RIDGECREST RESORT COMMUNITY	Chicago	Groundwater	476	0	–
Five Star Mobile Home Park	Skokie	Groundwater	458	0	–
LINCOLNWOOD MHP	Skokie	Groundwater	450	2	Yes
LA GRANGE ESTATES MHP	Lagrange	Surface Water	440	0	–
AQUA ILLINOIS-NORDIC WOODS	Glenview	Groundwater	425	0	–
DES PLAINES MHP	Desplaines	Groundwater	405	16	Yes
NHC UTILITIES	Chicago	Surface Water	401	0	–
HARVEST VIEW MHC	Northbrook	Groundwater	400	1	Yes
MOUNTAIN VALE VILLAGE MHP	Chicago	Groundwater	388	0	–
ROYAL MELBOURNE HOMEOWNERS ASN	Schaumburg	Groundwater	382	0	–
LINWAY ESTATES MHP	Blue Island	Groundwater	380	0	–
SUNRISE MHP	Skokie	Groundwater	375	0	–
WHISPERING LAKES WATER SYSTEM, INC.	Northbrook	Groundwater	375	0	–
RIVERVIEW ESTATES	Skokie	Groundwater	375	0	–
FOXWOOD FARMS	Chicago	Groundwater	332	0	–
GLEN EDEN ESTATES HOMEOWNERS ASSOCIATION	Norwood Park Township	Surface Water	312	5	Yes
AQUA ILLINOIS-OAKVIEW	Glenview	Groundwater	312	1	Yes
AQUA ILLINOIS-WOODLAWN	Glenview	Groundwater	290	0	–
PLEASANT RIDGE MHP	Chicago	Groundwater	284	1	Yes
MC COOK	Mccook	Surface Water	280	0	–
AQUA ILLINOIS-RAVENNA	Glenview	Groundwater	267	0	–
GREEN ACRES NJ MHC LLC	Skokie	Groundwater	260	0	–
BROOKSIDE MEADOWS MHP	Northbrook	Groundwater	250	0	–
AQUA ILLINOIS-SKYLINE	Glenview	Groundwater	249	0	–
MODENA COUNTRY CLUB	Skokie	Groundwater	245	0	–
LINDENTREE TOWNHOMES	Glenview	Groundwater	232	0	–
WOODLAND ACRES MHC	Blue Island	Groundwater	230	0	–
AQUA ILLINOIS-FAIRHAVEN ESTATES	Glenview	Groundwater	225	0	–
AQUA ILLINOIS-INDIANOLA	Glenview	Groundwater	219	0	–
BRIARCREST SBDV HOMEOWNERS ASSOCIATION	Schaumburg	Groundwater	207	0	–
LAKE HICKORY RV RESORT	Chicago	Groundwater	200	0	–
ROLLING GREEN ESTATES MHP	Chicago	Groundwater	191	0	–
COUNTRY MANOR	Chicago	Groundwater	190	0	–
AQUA ILLINOIS-HIGHLAND ESTATES	Glenview	Groundwater	171	2	Yes
ROYAL OAKS MHP	Chicago	Groundwater	170	1	Yes
LAKE BLUFF ESTATES MHP	Melrose Park	Groundwater	165	0	–
POYNETTE MOBILE ESTATES	Chicago	Groundwater	150	10	Yes
PRAIRIE RIDGE ASSOCIATION	Schaumburg	Groundwater	148	1	Yes
UNIVERSITY MOBILE ESTATES #2	Chicago	Groundwater	148	1	Yes
AQUA ILLINOIS-SUMMERDALE	Glenview	Surface Water	145	0	–
WOOD DALE ESTATES	Melrose Park	Surface Water	145	1	Yes
SUGARLOAF MOBILE HOME PARK	Chicago	Groundwater	142	0	–
HIGHLAND OAKS MHC	Skokie	Groundwater	132	0	–
HARBOR LITES-PISTAKEE FSHG CL	Chicago	Groundwater	132	0	–
WHISPERING PINES ESTATES	Chicago	Groundwater	125	0	–
TRIANGLE MANUFACTURED HOME COMMUNITY	Arlington Heights	Groundwater	124	0	–
THREE MILE LAKE TRAILER PARK	Chicago	Groundwater	112	0	–
GOLDEN POND ESTATES	Chicago	Groundwater	102	0	–
GROVE SHORES MOBILE HOME COMMUNITY	Skokie	Groundwater	100	1	Yes
AQUA ILLINOIS-SHERIDAN GROVE	Glenview	Groundwater	100	0	–
FALL CREEK MHP	Skokie	Groundwater	100	3	Yes
SANDWICH ESTATES MHP	Chicago	Groundwater	90	0	–
SHERWOOD SHORES CONDOMINIUMS	Lemont	Groundwater	90	5	Yes
MAPLE KNOLL	Chicago	Groundwater	90	2	Yes
LAKECREST SHORES LLC	Chicago	Groundwater	88	0	–
SUNRISE SENIOR LIVING	Prospect Heights	Groundwater	82	0	–
HAVILAND M.H.P. #1 - ANDREA & DEBRA CT	Skokie	Groundwater	78	12	Yes
APPLEWOOD	Chicago	Groundwater	75	0	–
CAMP DEEP LAKE LLC	Linconwood	Groundwater	75	0	–
EDWARD HINES JR V A HOSPITAL	Hines	Surface Water	60	0	–
VIKING RIVER MOBILE HOME PARK	Chicago	Groundwater	55	1	Yes
HAVILAND M.H.P. #2 - JENNIFER CT	Skokie	Groundwater	53	0	–
SHADY BROOK MOBILE HOME PARK	Chicago	Groundwater	50	0	–
WOODLAND ESTATES MHC 1	Chicago	Groundwater	50	1	Yes
WOODLAND ESTATES MHC 2	Chicago	Groundwater	50	0	–
SAGE MEADOW OF LAKE GENEVA	Chicago	Groundwater	33	0	–
MID-MARK WATER COMMISSION	Markham	Surface Water	25	0	–
BROOKFIELD-NORTH RIVERSIDE WATER COMM.	Brookfield	Surface Water	1	0	–
NORTHWEST WATER COMMISSION	Des Plaines	Surface Water	1	0	–
NORTHWEST SUBURBAN MUNICIPAL JAWA	Elk Grove Village	Surface Water	1	0	–
HILLSIDE BERKELEY WATER COMMISSION	Bellwood	Surface Water	1	0	–
BROADVIEW-WESTCHESTER JOINT WATER AGENCY	Broadview	Surface Water	1	0	–
MORTON GROVE - NILES WATER COMMISSION	Niles	Surface Water	0	0	–

TRI Facilities (50)

#	Facility	City	Industry	Total Releases
1	Wieland Metals Inc	Wheeling	Primary Metals	26.7M lbs
2	Cleveland-Cliffs Riverdale LLC	Riverdale	Primary Metals	5.4M lbs
3	Envirite of Illinois Inc	Harvey	Hazardous Waste	4.9M lbs
4	A Finkl & Sons Co DBA Finkl Steel - Chicago	Chicago	Primary Metals	4.3M lbs
5	Ingredion Inc Argo Plant	Bedford Park	Food	3.9M lbs
6	Befesa Zinc US Inc.	Chicago	Primary Metals	3.1M lbs
7	Real Alloy Recycling LLC	Chicago Heights	Primary Metals	1.6M lbs
8	Ford Motor Co Chicago Assembly	Chicago	Transportation Equipment	1.6M lbs
9	Ardagh Metal Beverage USA Inc Re : Chicago Plant	Chicago	Fabricated Metals	1.5M lbs
10	W R Grace & Co	Chicago	Chemicals	873.2K lbs
11	Koppers Inc	Cicero	Chemicals	797.2K lbs
12	Allied Tube & Conduit Corp.	Harvey	Primary Metals	787.8K lbs
13	Wheatland Tube Co - Chicago Div	Chicago	Electrical Equipment	645.3K lbs
14	Chicago Heights Steel	Chicago Heights	Primary Metals	587.4K lbs
15	Gatto Industrial Platers Inc.	Chicago	Fabricated Metals	546.8K lbs
16	Belmont Plating Works	Franklin Park	Fabricated Metals	533.8K lbs
17	Dynaburr Chicago Inc.	Northlake	Fabricated Metals	484.0K lbs
18	Magnetic Inspection Laboratory Inc	Elk Grove Village	Fabricated Metals	462.3K lbs
19	Chem-Plate Industries Inc	Elk Grove Village	Fabricated Metals	364.4K lbs
20	Greif Packaging LLC	Alsip	Fabricated Metals	352.4K lbs
21	Bway Corp	Chicago	Fabricated Metals	325.3K lbs
22	Arlington Plating Acquisition Co	Palatine	Fabricated Metals	303.3K lbs
23	Century Plating Co Inc.	Chicago	Fabricated Metals	279.4K lbs
24	Chem-Plate Industries	Elk Grove Village	Fabricated Metals	262.7K lbs
25	Sloan Valve Co	Franklin Park	Fabricated Metals	253.8K lbs
26	Hallstar Co Ester Solutions Facility	Bedford Park	Chemicals	245.0K lbs
27	Westlake Epoxy Inc	Bedford Park	Chemicals	226.7K lbs
28	Chicago Steel Container LLC DBA North Coast Container	Chicago	Fabricated Metals	204.9K lbs
29	Safety-Kleen Systems	Dolton	Hazardous Waste	201.9K lbs
30	Clean Harbors Recycling Services of Chicago LLC	Chicago	Hazardous Waste	199.1K lbs
31	Able Electropolishing Co Inc	Chicago	Fabricated Metals	197.2K lbs
32	Senior Flexonics	Bartlett	Transportation Equipment	194.7K lbs
33	Enchro Plating Ltd.	Melrose Park	Fabricated Metals	184.1K lbs
34	Meyer Steel Drum Inc	Chicago	Fabricated Metals	159.5K lbs
35	Signode Industrial Group LLC	Bridgeview	Fabricated Metals	155.3K lbs
36	Riverdale Plating & Heat Treating LLC	Riverdale	Fabricated Metals	153.4K lbs
37	S&c Electric Co	Chicago	Electrical Equipment	147.4K lbs
38	Bostik Inc	Calumet City	Chemicals	135.9K lbs
39	Reworld Oil LLC	Hodgkins	Hazardous Waste	131.1K lbs
40	Amitron Corp	Elk Grove Village	Computers and Electronic Products	127.0K lbs
41	Rose Packing a Div of Osi Industries LLC	Chicago	Food	125.0K lbs
42	Sipi Metals Corp.	Chicago	Primary Metals	118.9K lbs
43	Edsal Manufacturing Co Inc	Chicago	Fabricated Metals	112.9K lbs
44	Thunderbird Metals	Elk Grove Village	Fabricated Metals	102.8K lbs
45	Vantage Oleochemicals	Chicago	Chemicals	99.0K lbs
46	North American Electroless Nic Kel Inc.	Elk Grove Village	Fabricated Metals	94.7K lbs
47	Accu Labs Inc	Chicago	Chemical Wholesalers	94.0K lbs
48	Golden Grain	Bridgeview	Food	90.3K lbs
49	Saporito Finishing Co	Cicero	Fabricated Metals	88.6K lbs
50	Accurate Dispersions	South Holland	Chemicals	79.2K lbs

Superfund Sites (4)

Site Name	City	Status	HRS Score
Acme Steel Coke Plant	Chicago	NPL Site	30.00
Estech General Chemical Company	Calumet City	NPL Site	30.00
Lake Calumet Cluster	Chicago	NPL Site	30.00
Schroud Property	Chicago	NPL Site	50.00

Cities in Cook (121)

Chicago

100 facilities · 36 water

Elk Grove Village

35 facilities · 2 water

Franklin Park

16 facilities · 2 water

Chicago Heights

15 facilities · 1 water

Wheeling

15 facilities · 1 water

Bedford Park

14 facilities · 1 water

Alsip

11 facilities · 1 water

Cicero

9 facilities · 1 water

Melrose Park

8 facilities · 3 water

Skokie

6 facilities · 15 water

Lemont

6 facilities · 3 water

Bridgeview

6 facilities · 1 water

Mc Cook

6 facilities · 1 water

Des Plaines

5 facilities · 3 water

Hillside

5 facilities · 1 water

Morton Grove

5 facilities · 1 water

Arlington Heights

4 facilities · 2 water

Bellwood

4 facilities · 2 water

Broadview

4 facilities · 2 water

Calumet City

4 facilities · 1 water

Dolton

4 facilities · 1 water

Northlake

4 facilities · 1 water

Riverdale

4 facilities · 1 water

Schiller Park

4 facilities · 1 water

South Holland

4 facilities · 1 water

Northbrook

3 facilities · 12 water

Schaumburg

3 facilities · 4 water

Bartlett

3 facilities · 1 water

Harvey

3 facilities · 1 water

Streamwood

3 facilities · 1 water

Willow Springs

3 facilities · 0 water

Blue Island

2 facilities · 3 water

Niles

2 facilities · 2 water

Countryside

2 facilities · 1 water

Crestwood

2 facilities · 1 water

Evanston

2 facilities · 1 water

Forest Park

2 facilities · 1 water

Glenwood

2 facilities · 1 water

Homewood

2 facilities · 1 water

Lansing

2 facilities · 1 water

Palatine

2 facilities · 1 water

Rolling Meadows

2 facilities · 1 water

Harwood Heights

2 facilities · 0 water

Lincolnwood

2 facilities · 0 water

Summit Argo

2 facilities · 0 water

Glenview

1 facilities · 34 water

La Grange

1 facilities · 3 water

Berwyn

1 facilities · 1 water

Hazel Crest

1 facilities · 1 water

Hodgkins

1 facilities · 1 water

Hoffman Estates

1 facilities · 1 water

Matteson

1 facilities · 1 water

Mount Prospect

1 facilities · 1 water

Phoenix

1 facilities · 1 water

Thornton

1 facilities · 1 water

Barrington

0 facilities · 3 water

Brookfield

0 facilities · 2 water

Burbank

0 facilities · 2 water

Lake Barrington

0 facilities · 2 water

Markham

0 facilities · 2 water

Palos Park

0 facilities · 2 water

Prospect Heights

0 facilities · 2 water

Berkeley

0 facilities · 1 water

Burnham

0 facilities · 1 water

Calumet Park

0 facilities · 1 water

Chicago Ridge

0 facilities · 1 water

Country Club Hills

0 facilities · 1 water

Dixmoor

0 facilities · 1 water

East Hazel Crest

0 facilities · 1 water

Elmwood Park

0 facilities · 1 water

Evergreen Park

0 facilities · 1 water

Flossmoor

0 facilities · 1 water

Ford Heights

0 facilities · 1 water

Forest View

0 facilities · 1 water

Garden Homes

0 facilities · 1 water

Glencoe

0 facilities · 1 water

Golf

0 facilities · 1 water

Hardwood Heights

0 facilities · 1 water

Hickory Hills

0 facilities · 1 water

Hines

0 facilities · 1 water

Hometown

0 facilities · 1 water

Indian Head Park

0 facilities · 1 water

Justice

0 facilities · 1 water

Kenilworth

0 facilities · 1 water

Lagrange Park

0 facilities · 1 water

Lincolonwood

0 facilities · 1 water

Linconwood

0 facilities · 1 water

Lynwood

0 facilities · 1 water

Lyons

0 facilities · 1 water

Maywood

0 facilities · 1 water

Merrionette Park

0 facilities · 1 water

Midlothian

0 facilities · 1 water

Norridge

0 facilities · 1 water

North Riverside

0 facilities · 1 water

Northfield

0 facilities · 1 water

Norwood Park Township

0 facilities · 1 water

Oak Forest

0 facilities · 1 water

Oak Lawn

0 facilities · 1 water

Oak Park

0 facilities · 1 water

Olympia Fields

0 facilities · 1 water

Orland Park

0 facilities · 1 water

Palos Heights

0 facilities · 1 water

Palos Hills

0 facilities · 1 water

Park Ridge

0 facilities · 1 water

Posen

0 facilities · 1 water

Richton Park

0 facilities · 1 water

River Forest

0 facilities · 1 water

River Grove

0 facilities · 1 water

Riverside

0 facilities · 1 water

Robbins

0 facilities · 1 water

Rosemont

0 facilities · 1 water

Sauk Village

0 facilities · 1 water

South Chicago Heights

0 facilities · 1 water

Stickney

0 facilities · 1 water

Summit

0 facilities · 1 water

Techny

0 facilities · 1 water

Westchester

0 facilities · 1 water

Western Springs

0 facilities · 1 water

Wilmette

0 facilities · 1 water

Winnetka

0 facilities · 1 water

Worth

0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Cook, Illinois? ▼

Cook, IL has an environmental risk score of 94/100 (High Risk), based on 50 TRI facilities, 4 Superfund sites, and 235 water systems on record. 87 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.

Are there Superfund sites in Cook? ▼

Yes, Cook, IL has 4 Superfund sites on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).

How many toxic release facilities are in Cook? ▼

Cook, IL has 50 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 64.6M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.

What is the air quality in Cook? ▼

In 2024, Cook, IL recorded a median AQI of 54 and a peak AQI of 166. 36% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.

Is the drinking water safe in Cook? ▼

Cook, IL has 235 EPA-regulated water systems. 87 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.

What environmental agencies cover Cook? ▼

Environmental compliance in Cook, Illinois is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Illinois state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related Guides

Understanding EPA Data

How EPA collects and publishes environmental data

Environmental Justice

Who lives near polluters and environmental hazards

How to Check Environmental Quality

Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

Browse all → | Rankings →

Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro