Wastewater Treatment Plants in Illinois

656 facilities · 787 MGD combined flow

Below are publicly owned wastewater treatment plants in Illinois tracked by Klarifi, with average flow, treatment technology and NPDES permit details. Click a facility for its full profile. Showing the 200 largest by flow of 656 total — search the full set in the Klarifi platform.

Facility	City	Flow (MGD)
MWRDGC Terrence J O'Brien Water Reclamation Plant	Skokie	183.75
Scales Mound Stp, Village Of	Scales Mound	121.4
Sanitary District Of Decatur	Decatur	31.93
Springbrook Water Reclamation Center	Naperville	18.43
Greater Peoria Sanitary And Sewage District	Peoria	16.86
Bloomington Normal WRD -West STP	Bloomington	15.39
Spring Creek STP	Springfield	14.82
Macon Stp, City Of	Macon	14.29
Flagg Creek Water Reclamation	Burr Ridge	11.29
Fox River Water Reclamation Dist	Elgin	11.17
Glenbard Wastewater Authority	Glen Ellyn	9.44
Downers Grove Sanitary District	Downers Grove	9.22
Elmhurst Stp, City Of	Elmhurst	9.21
Lake County Public Works Department	Buffalo Grove	8.22
Joliet West Stp, City Of	Joliet	8.02
Alton Waste Water Treatment Plant	Alton	8
Woodridge-Greene Valley WWTP	Woodridge	7.94
Scwrd Sugar Creek WWTP	Springfield	7.2
Urbana & Champaign Sd	Urbana	6.38
Galesburg Sanitary District STP	Galesburg	6.18
Danville Sanitary District STP	Danville	5.78
Romeoville Wastewater Treatment Facility	Romeoville	5.57
Dix-Kell Water & Sewer Commission STP	Dix	5.54
Wheaton Sanitary District WWTF	Wheaton	5.27
Plainfield North Stp, Village Of	Plainfield	5.13
East Moline Wastewater	East Moline	4.96
North Slope Treatment Plant	Moline	4.64
Sterling WWTP	Sterling	4.38
City Of Monmouth	Monmouth	3.98
Bloomington-Normal WRD SE WWTP	Bloomington	3.97
Frankfort, Village Of	Frankfort	3.92
Moline South Treatment Plant	Moline	3.92
Jacksonville STP	Jacksonville	3.37
Fox River Water Reclamation Di	Elgin	3.33
Kewanee STP	Kewanee	3.18
Collinsville Wastewater Treatment Plant	Collinsville	3
Pekin STP #1	Pekin	2.96
Village Of Bolingbrook STP #3	Bolingbrook	2.92
Edwardsville Stp, City Of	Edwardsville	2.9
Marion SE Stp, City Of	Marion	2.84
City Of East Peoria Wastwater Treatment Plant	East Peoria	2.8
Addison Stw North 3	Addison	2.66
Metropolitan Water Reclamation District	Lemont	2.65
O Fallon STP	O Fallon	2.64
Sycamore STP - North Plant	Sycamore	2.63
Morris WWTP #2 - Stp, City Of	Morris	2.63
Morton STP 2	Morton	2.55
Rochelle City Of	Rochelle	2.47
Algonquin Stw, Village Of	Algonquin	2.45
Streator STP	Streator	2.41
Caseyville Township East STP	O Fallon	2.32
Lake In The Hills Sd	Lake In The Hills	2.31
Village Of Mokena Stw	Mokena	2.28
Bartlett Stp, Village Of	Bartlett	2.28
Yorkville-Bristol Sd STP	Yorkville	2.13
Centralia Stw Main, City Of	Centralia	2.03
Christian County Water Reclamation District	Taylorville	2.03
Deerfield WRF	Deerfield	1.97
New Lenox STP #1, Village Of	New Lenox	1.9
Woodstock Northside Wastewater Treatment Plant	Woodstock	1.89
Effingham STP	Effingham	1.81
Illinois American Water - Jerseyville STP	Jerseyville	1.67
A.J. Larocca Wastewater Treatment Facility	Addison	1.59
Herrin Stp, City Of	Herrin	1.56
Swansea Stp, Village Of	Swansea	1.53
Itasca, Village Of - Prospect Avenue WWTP	Itasca	1.53
Washington STP #2	Washington	1.51
Rossville Stp, Village Of	Rossville	1.49
Crest Hill East Stp, City Of	Crest Hill	1.49
Canton West Stp, City Of	Canton	1.47
Cary Wwtp, Village Of	Cary	1.45
Olney Stp, City Of	Olney	1.44
Wood Dale North And South STP	Wood Dale	1.44
Murphysboro Stp, City Of	Murphysboro	1.37
Robinson Wwtp, City Of	Robinson	1.37
Harrisburg STP	Harrisburg	1.26
Bolingbrook STP #1	Bolingbrook	1.26
Casey - Northeast Stp, City Of	Casey	1.24
Pana STP	Pana	1.18
Watseka Stw	Watseka	1.11
Woodstock South Stp, City Of	Woodstock	1.11
Salem Stp, City Of	Salem	1.1
St. Clair Township Lincolnshire STP	Belleville	1.09
Mascoutah, City Of	Mascoutah	1.07
Mendota Stp, City Of	Mendota	1.06
Manteno Stw, Village Of	Manteno	1.06
West Frankfort Stw, City Of	West Frankfort	1.03
Harvard Wwtp, City Of	Harvard	1.01
Spring Valley WWTP	Spring Valley	0.99
New Lenox-STP #2, Village Of	New Lenox	0.97
Illinois American Water-Godfrey Wastewater	Godfrey	0.97
Manhattan Stw, Village Of	Manhattan	0.95
Huntley East Wwtp, Village Of	Huntley	0.93
Johnston City STP	Johnston City	0.87
City Of Waterloo STP 3	Waterloo	0.87
Highland Water Reclamation	Highland	0.86
Flora Stp, City Of	Flora	0.85
East Dundee Wwtp, Village Of	East Dundee	0.84
Pittsfield Stp, City Of	Pittsfield	0.84
Peru STP #2	Peru	0.83
Braidwood Stp, City Of	Braidwood	0.82
Milan STP	Milan	0.82
Stookey Township WWTP	Belleville	0.82
Auburn Stp, City Of	Auburn	0.8
Carthage Stp, City Of	Carthage	0.78
Elburn Wwtp, Village Of	Elburn	0.78
Coal City Stp, Village Of	Coal City	0.76
Rushville Stp, City Of	Rushville	0.73
Wilmington Stp, City Of	Wilmington	0.72
Huntley - West WWTP	Huntley	0.72
Lebanon Stp, City Of	Lebanon	0.72
Greenville Stp, City Of	Greenville	0.71
Morton STP 3	Morton	0.71
Plano Stp, City Of	Plano	0.71
Fairfield, City Of	Fairfield	0.71
Staunton Stp, City Of	Staunton	0.7
Pingree Grove, Village Of	Pingree Grove	0.69
Crest Hill West Stp, City Of	Crest Hill	0.68
Shelbyville Stw, City Of	Shelbyville	0.67
Roselle-J Botterman STP	Roselle	0.67
Leroy Stp, City Of	Le Roy	0.66
Vandalia Stp, City Of	Vandalia	0.65
Galena South WWTF	Galena	0.63
Sparta - Southeast Stp, City Of	Sparta	0.63
Beecher Stp, Village Of	Beecher	0.62
Griggsville Stp, City Of	Griggsville	0.62
Chester STP	Chester	0.61
East Alton Stp, Village Of	East Alton	0.6
Abingdon Stp, City Of	Abingdon	0.59
Breese Stp, City Of	Breese	0.59
Paxton Stp, City Of	Paxton	0.59
Minonk Stw, City Of	Minonk	0.58
Christopher Stp, City Of	Christopher	0.57
Duquoin Stp, City Of	Du Quoin	0.57
Farmington Sanitary District STP	Farmington	0.57
Roodhouse Stp, City Of	Roodhouse	0.57
Geneseo Stp, City Of	Geneseo	0.56
Crossville Stp, Village Of	Crossville	0.55
Carterville Stp, City Of	Carterville	0.54
Stockton Stp, Village Of	Stockton	0.53
Eureka WTP	Eureka	0.53
City Of Red Bud	Red Bud	0.52
Smithton Stp, Village Of	Smithton	0.52
Oglesby Stp, City Of	Oglesby	0.52
Mahomet Stp, Village Of	Mahomet	0.51
Diamond Wwtp, Village Of	Diamond	0.51
Marissa, Village Of	Marissa	0.51
Millstadt Stp, Village Of	Millstadt	0.5
Wyoming Stp, City Of	Wyoming	0.5
Cambridge Stp, Village Of	Cambridge	0.49
Pinckneyville STP #1	Pinckneyville	0.49
Fairbury Stw, City Of	Fairbury	0.49
Anna Stw, City Of	Anna	0.48
Carlyle Stp, City Of	Carlyle	0.47
Genoa Stw, City Of	Genoa	0.46
Caseyville Township West STP	O Fallon	0.46
Windsor Stp, City Of	Windsor	0.46
Fulton Wwtp, City Of	Fulton	0.46
Carrollton Stp, City Of	Carrollton	0.46
Marshall Stp, City Of	Marshall	0.45
Aqua Illinois - Peotone STP	Peotone	0.45
Mt Sterling - Stp, City Of	Mount Sterling	0.45
Mount Sterling SE Stp, City Of	Mount Sterling	0.45
Crystal Lake WWTP #3	Crystal Lake	0.43
Marengo Stp, City Of	Marengo	0.43
Illinois American Water - Villa Grove STP	Villa Grove	0.43
Gilman North Stp, City Of	Gilman	0.42
Brighton Stp, Village Of	Brighton	0.41
Girard WWTP	Girard	0.4
St Charles Main Stw East, Stw West	Saint Charles	0.39
East Peoria #3 STP	East Peoria	0.39
Georgetown Stp, City Of	Georgetown	0.39
Amboy Stp, City Of	Amboy	0.39
Galva Southwest STP	Galva	0.39
Mt. Morris Stp, Village Of	Mt. Morris	0.37
Orion Wastewater Treatment Plant	Orion	0.37
Lanark Stp, City Of	Lanark	0.37
Neoga Stp, City Of	Neoga	0.37
Mount Olive North STP	Mount Olive	0.36
Wbsd Wastewater Treatment Plant	Belgium	0.35
Elmwood Stp, City Of	Elmwood	0.35
Chillicothe Sd	Chillicothe	0.34
Vienna Stp, City Of	Vienna	0.34
Sigel, Village Of	Sigel	0.34
Albion WWTP	Albion	0.34
Lakewood Stp, Village Of	Lakewood	0.33
Pinckneyville STP 2 East, City Of	Pinckneyville	0.33
Roanoke Stp, Village Of	Roanoke	0.33
Aledo South Stp, City Of	Aledo	0.33
Dupo Stp, Village Of	Dupo	0.33
Virginia Stp, City Of	Virginia	0.32
Rockton Stp, Village Of	Rockton	0.32
Sangamon Valley Pwd STP	Mahomet	0.32
Sheridan Sanitary District - STP	Sheridan	0.32
Newton Stw	Newton	0.31
Mason City Stp, City Of	Mason City	0.31
Rend Lake Conservancy District - STP	Ewing	0.3
Henry Stp, City Of	Henry	0.3
White Hall Stp, City Of	White Hall	0.3
Ladd Stp, Village Of	Ladd	0.3

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