How many wastewater treatment plants are there in Indiana?

Klarifi tracks 432 publicly owned wastewater treatment plants in Indiana with a combined average flow of 504 million gallons per day, serving about 4,093,439 residents. 67 of them treat more than 1 MGD and 9 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 83.83 MGD.

What treatment technologies are common in Indiana?

189 of Indiana's plants use lagoon systems and 59 have biogas or anaerobic digestion infrastructure, based on Klarifi's aerial imagery review.

How many NPDES permits in Indiana are up for renewal?

25 permits held by Indiana plants expire in 2026 and 70 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

432 facilities · 504 MGD combined flow

Klarifi tracks 432 publicly owned wastewater treatment plants in Indiana with a combined average flow of 504 MGD, serving about 4,093,439 residents. 67 plants treat more than 1 MGD and 9 more than 10 MGD; 189 use lagoon systems and 59 have digesters or biogas infrastructure. The largest is Indianapolis Belmont WWTP in Indianapolis at 83.83 MGD. 25 NPDES permits expire this year and 70 next year.

Every plant below links to a profile with average and design flow, treatment technology, the NPDES permit and its expiry, a three-year compliance snapshot and the capital projects planned in its city. Showing facilities 1–200 of 432 by average flow — browse the rest with the page links below.

432 plant locations in Indiana; dot size follows average flow.

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 →25 permits expiring in 2026 →70 permits expiring in 2027 →91 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in Indiana

The 25 largest publicly owned wastewater treatment plants in Indiana by average flow, with NPDES permit, expiry, treatment technology and three-year violation count. Source: EPA ICIS-NPDES via Klarifi.
Facility	City	Avg flow (MGD)	Design (MGD)	NPDES permit	Expires	Technology	Violations (3y)
Indianapolis Belmont WWTP	Indianapolis	83.83	125	IN0023183	May 2029	Biogas balloons	116
Gary Sanitary District	Gary	32.6	60	IN0022977	Jun 2027	Clarifiers, Biogas silos, Biogas balloons	24
Water Pollution Control Plant	Fort Wayne	29.9	74	IN0032191	Feb 2026	Clarifiers, Biogas silos, Biogas balloons	2
Saniatry District Of Hammond	Hammond	25.83	37.8	IN0023060	Apr 2027	Clarifiers, Uncovered lagoons, Biogas silos	21
City Of South Bend Wastewater Treatment Plant	South Bend	23.29	48	IN0024520	Nov 2026	Clarifiers, Biogas silos, Biogas balloons	4
Lafayette WWTP	Lafayette	15.2	33	IN0032468	Jul 2028	Clarifiers, Uncovered lagoons, Biogas silos	0
East Chicago Sanitary District	East Chicago	13.24	15	IN0022829	Jun 2026	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	44
Muncie Water Pollution Control Facility	Muncie	12.2	24	IN0025631	Jun 2029	Clarifiers, Biogas silos	0
Evansville Westside WWTP	Evansville	10.6	21.7	IN0032956	Jan 2027	Clarifiers, Biogas silos	10
Eastside Wastewater Treatment Plant	Evansville	9.8	18	IN0033073	Jan 2027	Clarifiers, Biogas silos	13
Mishawaka Wastewater Treatment Plant	Mishawaka	9.43	20	IN0025640	Apr 2027	Clarifiers, Biogas silos	2
Elkhart Public Works And Utilities	Elkhart	9.19	20	IN0025674	Apr 2027	Clarifiers, Biogas silos, Biogas balloons	179
Dillman Waste Water Treatment Plant	Bloomington	8.64	15	IN0035718	Aug 2029	Uncovered lagoons	7
West Lafayette WWTP	West Lafayette	7.9	10.5	IN0024821	Jan 2031	Clarifiers, Biogas silos	10
Carmel WWTP	Indianapolis	7.22	14	IN0022497	Nov 2028	—	0
Anderson WWTP	Anderson	7	21.25	IN0032476	Sep 2030	Clarifiers, Biogas balloons	11
Columbus Wwtp, City Of	Columbus	6.92	14	IN0032573	Mar 2030	—	4
Fishers Cheeney Creek WWTP	Fishers	6.9	10	IN0055484	Oct 2027	Clarifiers	2
Noblesville Wwtp, City Of	Noblesville	6.05	10	IN0020168	May 2031	Clarifiers, Biogas silos	2
City Of Kokomo Waste Water Treatment Facility	Kokomo	5.96	23.5	IN0032875	Nov 2026	Clarifiers, Uncovered lagoons	19
New Albany WWTP	New Albany	5.41	12	IN0023884	May 2027	Clarifiers, Carrousels / oxidation ditches	14
Schererville WWTP	Schererville	4.75	8.75	IN0024457	Jul 2028	Clarifiers, Biogas silos	8
Jeffersonville Municipal WWTP	Jeffersonville	4.48	9	IN0023302	Feb 2031	Clarifiers, Carrousels / oxidation ditches	9
Elden Kuehl Pollution Control Facility	Valparaiso	4.41	8	IN0024660	Sep 2027	Clarifiers, Biogas silos	3
Richmond Wwtp, City Of	Richmond	3.96	18	IN0025615	Feb 2031	Clarifiers, Biogas silos	14

The 50 largest plants in Indiana →Indiana capital improvement plans →

Indiana plants by treatment technology

Activated sludge and clarifiers (209)Lagoon systems (189)Oxidation ditches (94)Anaerobic digesters and biogas (59)

All 432 plants in Indiana

Facility	City	Flow (MGD)
Indianapolis Belmont WWTP	Indianapolis	83.83
Gary Sanitary District	Gary	32.6
Water Pollution Control Plant	Fort Wayne	29.9
Saniatry District Of Hammond	Hammond	25.83
City Of South Bend Wastewater Treatment Plant	South Bend	23.29
Lafayette WWTP	Lafayette	15.2
East Chicago Sanitary District	East Chicago	13.24
Muncie Water Pollution Control Facility	Muncie	12.2
Evansville Westside WWTP	Evansville	10.6
Eastside Wastewater Treatment Plant	Evansville	9.8
Mishawaka Wastewater Treatment Plant	Mishawaka	9.43
Elkhart Public Works And Utilities	Elkhart	9.19
Dillman Waste Water Treatment Plant	Bloomington	8.64
West Lafayette WWTP	West Lafayette	7.9
Carmel WWTP	Indianapolis	7.22
Anderson WWTP	Anderson	7
Columbus Wwtp, City Of	Columbus	6.92
Fishers Cheeney Creek WWTP	Fishers	6.9
Noblesville Wwtp, City Of	Noblesville	6.05
City Of Kokomo Waste Water Treatment Facility	Kokomo	5.96
New Albany WWTP	New Albany	5.41
Schererville WWTP	Schererville	4.75
Jeffersonville Municipal WWTP	Jeffersonville	4.48
Elden Kuehl Pollution Control Facility	Valparaiso	4.41
Richmond Wwtp, City Of	Richmond	3.96
Shelbyville Wwtp, City Of	Shelbyville	3.81
City Of La Porte - Wastewater Treatment Plant	La Porte	3.47
Citizens Wastewater Of Westfield Llc Plant Capacity Expansion	Westfield	3.4
Portage Utility Service Facility WWTP	Portage	3.33
Goshen City Waste Water Treatment Plant Improvements	Goshen	3.1
Franklin Wwtp, City Of	Franklin	3.07
Seymour Wastewater Treatment Facility	Seymour	3.02
Nappanee Wwtp, City Of	Nappanee	3
Peru Utilities WWTP	Peru	2.92
Warsaw WWTP	Warsaw	2.9
South Dearborn Rsd	Lawrenceburg	2.83
Boonville WWTP	Boonville	2.7
Greenfield Wastewater Treatment Plant Improvements	Greenfield	2.7
Vincennes Wastewater Treatment Facility	Vincennes	2.68
New Castle WWTP	New Castle	2.66
Crown Point 2021 Wastewater Utility Improvements Divisions A And C	Crown Point	2.5
Washington WWTP	Washington	2.46
Brownsburg WWTP	Brownsburg	2.24
Chesterton WWTP	Chesterton	2.21
Town Of Clarksville Public Works Facility	Clarksville	2.2
Frankfort Wwtp, City Of	Frankfort	2.13
West Central Conservancy Dist	Avon	2.09
Elwood Wwtp, City Of	Elwood	2.06
Lebanon WWTP	Lebanon	2.04
Hendricks County Rsd	Avon	1.82
Plainfield North Water Pollution Control Facility	Plainfield	1.77
Huntington WWTP	Huntington	1.68
Bedford Wastewater Treatment Plant	Bedford	1.42
Sellersburg WWTP Rehab & Expansion	Sellersburg	1.4
City Of Madison, POTW	Madison	1.39
Columbia City Water Department	Columbia City	1.34
Whitestown South WWTP	Whitestown	1.32
Kendallville WWTP	Kendallville	1.29
Tell City WWTP	Tell City	1.28
Dyer Wastewater Treatment Plant	Dyer	1.24
Wabash WWTP	Wabash	1.2
Mooresville, Town Of	Mooresville	1.19
Decatur WWTP	Decatur	1.17
Bluffton Wastewater Treatment Facility	Bluffton	1.14
Brazil WWTP	Brazil	1.09
North Vernon WWTP	North Vernon	1.05
Mount Vernon WWTP	Mount Vernon	1.03
Martinsville WWTP	Martinsville	0.95
Butler WWTP	Butler	0.94
Bargersville Municipal WWTP	Bargersville	0.92
Alexandria WWTP	Alexandria	0.92
Scottsburg WWTP	Scottsburg	0.92
Angola WWTP	Angola	0.9
Western Wayne Regional Sewer District WWTP	Cambridge City	0.88
Portland WWTP	Portland	0.88
Winchester WWTP	Winchester	0.88
Zionsville WWTP	Zionsville	0.86
Ellettsville Municipal WWTP	Ellettsville	0.86
Tipton Utilities	Tipton	0.84
Hartford City WWTP	Hartford City	0.84
Sullivan WWTP	Sullivan	0.83
Rushville WWTP	Rushville	0.81
Yorktown Wwtp, Town Of	Yorktown	0.81
Cumberland WWTP	Cumberland	0.75
Burns Harbor & Arcelormittal Burns Harbor Llc	Burns Harbor	0.74
Mccordsville Waste Water Treatment Plant	Mccordsville	0.7
Salem WWTP	Salem	0.69
Bicknell Municipal WWTP	Bicknell	0.67
Huntingburg Municipal WWTP	Huntingburg	0.65
Crothersville WWTP	Crothersville	0.63
Westville WWTP	Westville	0.6
Pittsboro WWTP	Pittsboro	0.59
Middlebury WWTP	Middlebury	0.58
Peru Utilities/grissom	Peru	0.57
Gas City WWTP	Gas City	0.54
North Manchester WWTP	North Manchester	0.53
Whiteland WWTP	Whiteland	0.51
Ossian Wwtp, Town Of	Ossian	0.51
Ligonier WWTP	Ligonier	0.5
Berne WWTP	Berne	0.48
Garrett WWTP	Garrett	0.48
Prince'S Lakes WWTP	Edinburgh	0.47
Dunkirk WWTP	Dunkirk	0.47
Austin WWTP	Austin	0.47
Batesville Wwtp, City Of	Batesville	0.46
Edinburgh WWTP	Edinburgh	0.43
Cicero Wastewater Treatment Plant Expansion Project	Cicero	0.42
French Lick Municipal WWTP	West Baden Springs	0.41
Hanover WWTP	Hanover	0.41
Mitchell Wastewater Treatment Plant	Mitchell	0.39
Rockville WWTP	Rockville	0.38
Patoka Lake Regional Water-Treatment Plant #1	Dubois	0.38
Winfield WWTP	Crown Point	0.37
Morristown WWTP	Morristown	0.37
Syracuse Water Company-Treatment Plant #4	Syracuse	0.37
Linton WWTP	Linton	0.37
Fairmount WWTP	Fairmount	0.35
Churubusco Municipal STP	Churubusco	0.34
Chesterfield WWTP	Chesterfield	0.34
Bristol Water Department-Treatment Plant #1	Bristol	0.33
Royal Center WWTP	Royal Center	0.33
Town Of Fort Branch WWTP	Fort Branch	0.32
Middletown WWTP	Middletown	0.32
Fortville WWTP	Fortville	0.32
Wakarusa WWTP	Wakarusa	0.32
Veedersburg Municipal Water Supply	Veedersburg	0.31
Knox Municipal WWTP	Knox	0.31
Union City WWTP	Union City	0.3
Nashville WWTP	Nashville	0.3
Upland WWTP	Upland	0.3
New Palestine WWTP	New Palestine	0.3
Demotte Municipal WWTP	Demotte	0.29
Warren WWTP	Warren	0.29
Corydon WWTP	Corydon	0.29
Santa Claus Wastewater Treatment Plant	Santa Claus	0.29
North Webster WWTP	North Webster	0.29
Petersburg Municipal WWTP	Petersburg	0.28
Fremont Wastewater Treatment Plant	Fremont	0.28
Knightstown WWTP	Knightstown	0.28
Ferdinand Wastewater Treatment Plant	Ferdinand	0.27
Georgetown Water Reclamation Facility	Georgetown	0.27
New Whiteland Waste Water Tre	New Whiteland	0.26
Twin Lakes Rsd/big Monon Bay	Monticello	0.25
Lapel WWTP	Lapel	0.25
North Judson Municipal WWTP	North Judson	0.24
Clear Creek Conservancy District	Coatesville	0.24
Oakland City WWTP	Oakland City	0.24
Turkey Creek Regional Sewer District-Treatment Plant	Cromwell	0.24
Brownstown WWTP	Brownstown	0.23
Brookville WWTP	Brookville	0.23
Odon WWTP	Odon	0.23
Centerville WWTP	Centerville	0.23
Monrovia WWTP	Monrovia	0.23
Haubstadt WWTP	Haubstadt	0.23
Rockport South WWTP	Rockport	0.22
Walkerton Municipal WWTP	Walkerton	0.22
Avilla Wwtp, Town Of	Avilla	0.22
St Leon Municipal WWTP	West Harrison	0.22
Cloverdale Municipal WWTP	Cloverdale	0.22
Versailles Lagoons	Versailles	0.22
Winamac WWTP	Winamac	0.22
Fountain City Water Works	Fountain City	0.21
Borden Wwtp, Town Of	Borden	0.21
Hebron Wastewater Treatment Plant	Hebron	0.21
Remington WWTP	Remington	0.21
Culver Wastewater Treatment Plant	Culver	0.2
Paoli Municipal WWTP	Paoli	0.19
West Terre Haute WWTP	West Terre Haute	0.19
Battle Ground Municipal WWTP	Battle Ground	0.18
Rising Sun, City Of	Rising Sun	0.18
Woodburn Municipal Waste Water Treatment Plant	Woodburn	0.18
Liberty WWTP	Liberty	0.18
Bloomfield Municipal WWTP	Bloomfield	0.17
Shipshewana WWTP	Shipshewana	0.17
Attica Municipal WWTP	Attica	0.17
Rockport North Wastewater Treatment Plant	Rockport	0.16
Arcadia Wwtp, Town Of	Arcadia	0.16
Albion WWTP	Albion	0.16
Montgomery Wastewater Treatment Plant	Montgomery	0.16
Jasonville Municipal WWTP	Jasonville	0.16
Redkey WWTP	Redkey	0.16
Montpelier WWTP	Montpelier	0.16
Brookston Water Department-Treatment Plant	Brookston	0.16
Hagerstown WWTP	Hagerstown	0.16
Covington WWTP	Covington	0.16
Kouts Municipal WWTP	Kouts	0.16
Monon WWTP	Monon	0.16
Albany WWTP	Albany	0.15
Flora Municipal WWTP	Flora	0.15
Hamilton Lake Conservancy District	Hamilton	0.15
Milan WWTP	Milan	0.15
Trafalgar WWTP	Trafalgar	0.15
Topeka WWTP	Topeka	0.15
Andrews Wwtp, Town Of	Andrews	0.14
Lagrange Co Reg Utility Dist - Region B	Lagrange	0.14
Brooklyn WWTP	Brooklyn	0.14
Poseyville Municipal WWTP	Poseyville	0.14
Vevay WWTP	Vevay	0.14
Lakeland Regional Sewer District	Warsaw	0.14
Nature Works Conservancy District	Valparaiso	0.13

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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 September 11, 2026.

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