How many wastewater treatment plants are there in Indiana?

Klarifi tracks 434 publicly owned wastewater treatment plants in Indiana with a combined average flow of 619 million gallons per day, serving about 3,866,932 residents. 83 of them treat more than 1 MGD and 10 more than 10 MGD.

What is the largest wastewater treatment plant in Indiana?

Indianapolis Belmont WWTP in Indianapolis is the largest plant in Indiana by average flow, treating about 105.33 MGD.

What treatment technologies are common in Indiana?

163 of Indiana's plants use lagoon systems and 55 have biogas or anaerobic digestion infrastructure, based on Klarifi's aerial imagery review.

How many NPDES permits in Indiana are up for renewal?

15 permits held by Indiana plants expire in 2026 and 68 in 2027. Renewals typically bring new limits and trigger upgrade projects.

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Wastewater treatment plants in Indiana

Name: Wastewater treatment plants in Indiana
Creator: Klarifi
License: https://klarifi.io/terms-of-service

434 facilities · 619 MGD combined flow

Klarifi tracks 434 publicly owned wastewater treatment plants in Indiana with a combined average flow of 619 MGD, serving about 3,866,932 residents. 83 plants treat more than 1 MGD and 10 more than 10 MGD; 163 use lagoon systems and 55 have digesters or biogas infrastructure. The largest is Indianapolis Belmont WWTP in Indianapolis at 105.33 MGD. 15 NPDES permits expire this year and 68 next year.

Every plant below links to a profile with average and design flow, the NPDES permit and its expiry, a three-year compliance snapshot and the capital projects planned in its city. Treatment technology and verified contacts are shown with a free Klarifi account. Showing facilities 1–200 of 434 by average flow — browse the rest with the page links below.

434 plant locations in Indiana; dot size follows average flow. Boundaries: U.S. Census Bureau.

NPDES permits and renewals in Indiana

Every plant discharges under an NPDES permit that is renewed every five years, usually with tighter limits. The renewal year is the year a plant budgets for upgrades.

All NPDES permits in Indiana →15 permits expiring in 2026 →68 permits expiring in 2027 →93 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in Indiana

The 10 largest publicly owned wastewater treatment plants in Indiana by average flow, with NPDES permit, expiry and three-year violation count. Source: EPA ICIS-NPDES via Klarifi.
Facility	City	Avg flow (MGD)	Design (MGD)	NPDES permit	Expires	Violations (3y)
Indianapolis Belmont WWTP	Indianapolis	105.33	125	IN0023183	May 2029	117
Water Pollution Control Plant	Fort Wayne	44.71	74	IN0032191	Sep 2031	2
Gary Sanitary District	Gary	42.04	60	IN0022977	Jun 2027	23
Saniatry District Of Hammond	Hammond	34.49	37.8	IN0023060	Apr 2027	21
Lafayette WWTP	Lafayette	18	33	IN0032468	Jul 2028	0
Muncie Water Pollution Control Facility	Muncie	17.5	24	IN0025631	Jun 2029	0
Mishawaka Wastewater Treatment Plant	Mishawaka	12.29	20	IN0025640	Apr 2027	2
Evansville Westside WWTP	Evansville	11.68	21.7	IN0032956	Jan 2027	6
Dillman Waste Water Treatment Plant	Bloomington	11.49	15	IN0035718	Aug 2029	7
Anderson WWTP	Anderson	10.46	21.25	IN0032476	Sep 2030	9

Treatment technology for each plant is shown with a free Klarifi account. Create one →

The 50 largest plants in Indiana →EPA enforcement actions in Indiana →Indiana capital improvement plans →

Indiana plants by treatment technology

Activated sludge and clarifiers (208)Lagoon systems (163)Oxidation ditches (95)Anaerobic digesters and biogas (55)

All 434 plants in Indiana

Facility	City	Flow (MGD)
Indianapolis Belmont WWTP	Indianapolis	105.33
Water Pollution Control Plant	Fort Wayne	44.71
Gary Sanitary District	Gary	42.04
Saniatry District Of Hammond	Hammond	34.49
Lafayette WWTP	Lafayette	18
Muncie Water Pollution Control Facility	Muncie	17.5
Mishawaka Wastewater Treatment Plant	Mishawaka	12.29
Evansville Westside WWTP	Evansville	11.68
Dillman Waste Water Treatment Plant	Bloomington	11.49
Anderson WWTP	Anderson	10.46
City Of Kokomo Waste Water Treatment Facility	Kokomo	9.93
East Chicago Sanitary District	East Chicago	9.42
Columbus Wwtp, City Of	Columbus	8.15
West Lafayette WWTP	West Lafayette	8.01
New Albany WWTP	New Albany	7.82
Carmel WWTP	Indianapolis	7.69
Fishers Cheeney Creek WWTP	Fishers	7.56
Richmond Wwtp, City Of	Richmond	6.8
Schererville WWTP	Schererville	6.55
Kendallville WWTP	Kendallville	6.42
Noblesville Wwtp, City Of	Noblesville	6.39
Shelbyville Wwtp, City Of	Shelbyville	6.11
Elden Kuehl Pollution Control Facility	Valparaiso	5.77
Jeffersonville Municipal WWTP	Jeffersonville	5.13
Huntington WWTP	Huntington	4.95
Franklin Wwtp, City Of	Franklin	4.65
Seymour Wastewater Treatment Facility	Seymour	4.59
New Castle WWTP	New Castle	4.53
Portage Utility Service Facility WWTP	Portage	4.21
Citizens Wastewater Of Westfield Llc Plant Capacity Expansion	Westfield	4.02
Crown Point 2021 Wastewater Utility Improvements Divisions A And C	Crown Point	3.93
City Of La Porte - Wastewater Treatment Plant	La Porte	3.91
South Dearborn Rsd	Lawrenceburg	3.67
Peru Utilities WWTP	Peru	3.54
Frankfort Wwtp, City Of	Frankfort	3.53
Greenfield Wastewater Treatment Plant Improvements	Greenfield	3.43
Goshen City Waste Water Treatment Plant Improvements	Goshen	3.42
Elwood Wwtp, City Of	Elwood	3.3
Vincennes Wastewater Treatment Facility	Vincennes	3.24
Warsaw WWTP	Warsaw	3.23
Washington WWTP	Washington	3.2
Newburgh WWTP	Newburgh	3.17
Boonville WWTP	Boonville	3.13
Brownsburg WWTP	Brownsburg	2.86
Lebanon WWTP	Lebanon	2.86
Chesterton WWTP	Chesterton	2.64
Nappanee Wwtp, City Of	Nappanee	2.57
Columbia City Water Department	Columbia City	2.48
Plainfield North Water Pollution Control Facility	Plainfield	2.4
Bedford Wastewater Treatment Plant	Bedford	2.39
West Central Conservancy Dist	Avon	2.39
Butler WWTP	Butler	2.12
Hendricks County Rsd	Avon	2.1
Princeton WWTP	Princeton	2.07
City Of Madison, POTW	Madison	1.97
Dyer Wastewater Treatment Plant	Dyer	1.9
Decatur WWTP	Decatur	1.83
Bluffton Wastewater Treatment Facility	Bluffton	1.81
Sellersburg WWTP Rehab & Expansion	Sellersburg	1.8
Rushville WWTP	Rushville	1.76
North Vernon WWTP	North Vernon	1.73
Wabash WWTP	Wabash	1.71
Tell City WWTP	Tell City	1.61
Brazil WWTP	Brazil	1.6
Whitestown South WWTP	Whitestown	1.51
Mooresville, Town Of	Mooresville	1.5
Portland WWTP	Portland	1.5
Sullivan WWTP	Sullivan	1.5
Salem WWTP	Salem	1.46
Ellettsville Municipal WWTP	Ellettsville	1.4
Scottsburg WWTP	Scottsburg	1.34
Alexandria WWTP	Alexandria	1.27
Cumberland WWTP	Cumberland	1.24
Tipton Utilities	Tipton	1.19
Hartford City WWTP	Hartford City	1.18
Zionsville WWTP	Zionsville	1.18
Crothersville WWTP	Crothersville	1.17
Martinsville WWTP	Martinsville	1.16
Clear Creek Conservancy District	Coatesville	1.15
Angola WWTP	Angola	1.12
Batesville Wwtp, City Of	Batesville	1.05
Huntingburg Municipal WWTP	Huntingburg	1.04
Bargersville Municipal WWTP	Bargersville	1.01
Linton WWTP	Linton	1
Rockville WWTP	Rockville	0.98
Yorktown Wwtp, Town Of	Yorktown	0.98
Austin WWTP	Austin	0.96
Western Wayne Regional Sewer District WWTP	Cambridge City	0.95
Delphi WWTP	Delphi	0.94
Winchester WWTP	Winchester	0.94
Gas City WWTP	Gas City	0.82
Peru Utilities/grissom	Peru	0.8
Mccordsville Waste Water Treatment Plant	Mccordsville	0.77
Berne WWTP	Berne	0.77
Garrett WWTP	Garrett	0.75
Pittsboro WWTP	Pittsboro	0.73
Westport WWTP	Westport	0.71
Whiteland WWTP	Whiteland	0.7
Ossian Wwtp, Town Of	Ossian	0.69
North Manchester WWTP	North Manchester	0.68
Burns Harbor & Arcelormittal Burns Harbor Llc	Burns Harbor	0.68
Westville WWTP	Westville	0.67
French Lick Municipal WWTP	West Baden Springs	0.65
Union City WWTP	Union City	0.64
Edinburgh WWTP	Edinburgh	0.61
Ligonier WWTP	Ligonier	0.61
Rochester Wastewater Treatment Plant	Rochester	0.6
Middlebury WWTP	Middlebury	0.6
Bicknell Municipal WWTP	Bicknell	0.6
Cicero Wastewater Treatment Plant Expansion Project	Cicero	0.56
Town Of Fort Branch WWTP	Fort Branch	0.56
Corydon WWTP	Corydon	0.53
Fortville WWTP	Fortville	0.53
Santa Claus Wastewater Treatment Plant	Santa Claus	0.52
Wakarusa WWTP	Wakarusa	0.51
Jasonville Municipal WWTP	Jasonville	0.5
Knightstown WWTP	Knightstown	0.48
Hanover WWTP	Hanover	0.48
Dunkirk WWTP	Dunkirk	0.47
New Whiteland Waste Water Tre	New Whiteland	0.47
Petersburg Municipal WWTP	Petersburg	0.46
Fairmount WWTP	Fairmount	0.46
Winfield WWTP	Crown Point	0.46
Syracuse Water Company-Treatment Plant #4	Syracuse	0.45
Morristown WWTP	Morristown	0.44
Centerville WWTP	Centerville	0.44
Farmland Municipal STP	Farmland	0.43
Upland WWTP	Upland	0.43
Clinton Municipal WWTP	Clinton	0.42
Versailles Lagoons	Versailles	0.41
Royal Center WWTP	Royal Center	0.4
Patoka Lake Regional Water-Treatment Plant #1	Dubois	0.39
Chesterfield WWTP	Chesterfield	0.39
Brookville WWTP	Brookville	0.39
Spencer Municipal WWTP	Spencer	0.39
Oakland City WWTP	Oakland City	0.38
Mitchell Wastewater Treatment Plant	Mitchell	0.38
Liberty WWTP	Liberty	0.38
Paoli Municipal WWTP	Paoli	0.38
Veedersburg Municipal Water Supply	Veedersburg	0.38
Warren WWTP	Warren	0.37
Middletown WWTP	Middletown	0.37
Hebron Wastewater Treatment Plant	Hebron	0.37
Bristol Water Department-Treatment Plant #1	Bristol	0.37
Montpelier WWTP	Montpelier	0.37
Brownstown WWTP	Brownstown	0.36
Albany WWTP	Albany	0.36
Haubstadt WWTP	Haubstadt	0.36
Cloverdale Municipal WWTP	Cloverdale	0.36
New Palestine WWTP	New Palestine	0.35
Remington WWTP	Remington	0.35
Kentland WWTP	Kentland	0.35
Tri-Lakes Regional Sewer District	Columbia City	0.35
Fremont Wastewater Treatment Plant	Fremont	0.34
Nashville WWTP	Nashville	0.34
North Judson Municipal WWTP	North Judson	0.33
Turkey Creek Regional Sewer District-Treatment Plant	Cromwell	0.33
Georgetown Water Reclamation Facility	Georgetown	0.33
Osgood WWTP	Osgood	0.32
Winamac WWTP	Winamac	0.32
Hope WWTP	Hope	0.32
Arcadia Wwtp, Town Of	Arcadia	0.31
Knox Municipal WWTP	Knox	0.31
North Webster WWTP	North Webster	0.31
Ferdinand Wastewater Treatment Plant	Ferdinand	0.31
Milan WWTP	Milan	0.31
Flora Municipal WWTP	Flora	0.31
Avilla Wwtp, Town Of	Avilla	0.3
Lapel WWTP	Lapel	0.3
Demotte Municipal WWTP	Demotte	0.29
Odon WWTP	Odon	0.29
Brookston Water Department-Treatment Plant	Brookston	0.29
Marengo Municipal WWTP	Marengo	0.28
Lakeville Wastewater Treatment Plant	Lakeville	0.27
Albion WWTP	Albion	0.27
Monrovia WWTP	Monrovia	0.26
Borden Wwtp, Town Of	Borden	0.25
Greentown WWTP	Greentown	0.25
Woodburn Municipal Waste Water Treatment Plant	Woodburn	0.25
Attica Municipal WWTP	Attica	0.24
Twin Lakes Rsd/big Monon Bay	Monticello	0.24
Rockport South WWTP	Rockport	0.24
Bourbon WWTP	Bourbon	0.24
Lyons Municipal WWTP	Lyons	0.23
West Terre Haute WWTP	West Terre Haute	0.23
Covington WWTP	Covington	0.23
Churubusco Municipal STP	Churubusco	0.23
Culver Wastewater Treatment Plant	Culver	0.23
Indiana American Water - Farmersburg	Farmersburg	0.23
Battle Ground Municipal WWTP	Battle Ground	0.22
Pierceton WWTP	Pierceton	0.22
Monon WWTP	Monon	0.22
Hagerstown WWTP	Hagerstown	0.22
St Leon Municipal WWTP	West Harrison	0.21
Atlanta Water Dept	Atlanta	0.21
Frankton WWTP	Frankton	0.21
Redkey WWTP	Redkey	0.21
Rockport North Wastewater Treatment Plant	Rockport	0.21
Dale Municipal WWTP	Dale	0.2
Eaton WWTP	Eaton	0.2

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Wastewater treatment in Indiana: questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed October 26, 2026.

Wastewater terms: WWTP · POTW · MGD · NPDES permit · FOG · Equalization tank · all terms

Cite this page

Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.

Klarifi. “Wastewater treatment plants in Indiana.” Updated October 26, 2026. https://klarifi.io/facilities/indiana

Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.

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