How many wastewater permits expire in Indiana in 2027?

70 NPDES permits held by publicly owned wastewater treatment plants in Indiana expire in 2027, covering a combined average flow of 138 MGD. The busiest month is May 2027 with 11 expiries.

What happens when an NPDES permit expires?

The plant must have applied for renewal at least 180 days before the expiry date. If the agency has not reissued the permit by then, the old permit is administratively continued and stays enforceable. The reissued permit typically carries updated effluent limits based on the latest water-quality standards, which is what drives upgrade projects.

Which is the largest plant with a permit expiring in Indiana in 2027?

Gary Sanitary District in Gary, treating about 32.6 MGD under permit IN0022977, expiring Jun 2027.

How do I get contacts for the plants on this list?

Every plant links to its profile with flow, technology and compliance data. Verified decision-maker contacts for each plant, and the same list for every state and year, are available in Klarifi with a free trial.

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Indiana wastewater permits expiring in 2027

Name: Indiana NPDES permits expiring in 2027
Creator: Klarifi
License: https://klarifi.io/terms-of-service

70 NPDES permits · 138 MGD combined average flow

70 publicly owned wastewater treatment plants in Indiana hold NPDES permits that expire during 2027, issued by Indiana Department of Environmental Management. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.

An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.

Other years:

2026 (25)2028 (91)All Indiana NPDES permits →

Publicly owned wastewater treatment plants in Indiana with NPDES permits expiring in 2027, from EPA ICIS-NPDES records. Refreshed on every release.
Facility	City	Avg flow (MGD)	NPDES permit	Expires	Technology	Violations (3y)
Evansville Westside WWTP	Evansville	10.6	IN0032956	Jan 2027	Clarifiers, Biogas silos	10
Eastside Wastewater Treatment Plant	Evansville	9.8	IN0033073	Jan 2027	Clarifiers, Biogas silos	13
Vevay WWTP	Vevay	0.14	IN0020231	Jan 2027	—	1
Francesville Municipal WWTP	Francesville	0.02	IN0040037	Jan 2027	Uncovered lagoons	3
Mt Etna WWTP	Mount Etna	0.01	IN0058963	Jan 2027	Uncovered lagoons	0
Montezuma Wwtp, Town Of	Montezuma	—	IN0063916	Jan 2027	—	35
Pierceton WWTP	Pierceton	0.13	IN0020541	Feb 2027	—	12
Cannelton Municipal Sewage Tr	Cannelton	0.09	IN0064913	Feb 2027	—	8
Shelburn Municipal WWTP	Shelburn	0.09	IN0020389	Feb 2027	Clarifiers, Carrousels / oxidation ditches	26
Cumberland WWTP	Cumberland	0.75	IN0021300	Mar 2027	Aerated lagoons	6
Rome City WWTP	Rome City	0.11	IN0040541	Mar 2027	Aerated lagoons, Uncovered lagoons	4
Winslow Municipal WWTP	Winslow	0.09	IN0040789	Mar 2027	Uncovered lagoons	62
Chalmers Municipal WWTP	Chalmers	0.04	IN0030571	Mar 2027	Aerated lagoons	1
Saniatry District Of Hammond	Hammond	25.83	IN0023060	Apr 2027	Clarifiers, Uncovered lagoons, Biogas silos	21
Mishawaka Wastewater Treatment Plant	Mishawaka	9.43	IN0025640	Apr 2027	Clarifiers, Biogas silos	2
Elkhart Public Works And Utilities	Elkhart	9.19	IN0025674	Apr 2027	Clarifiers, Biogas silos, Biogas balloons	179
Bargersville Municipal WWTP	Bargersville	0.92	IN0022314	Apr 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	16
Greene County WWTP	Madison Township	0.0095	IN0063932	Apr 2027	—	22
New Albany WWTP	New Albany	5.41	IN0023884	May 2027	Clarifiers, Carrousels / oxidation ditches	14
Citizens Wastewater Of Westfield Llc Plant Capacity Expansion	Westfield	3.4	IN0059544	May 2027	—	5
Warsaw WWTP	Warsaw	2.9	IN0060917	May 2027	Clarifiers, Carrousels / oxidation ditches, Biogas silos	6
Middlebury WWTP	Middlebury	0.58	IN0023761	May 2027	Clarifiers, Carrousels / oxidation ditches	1
Avilla Wwtp, Town Of	Avilla	0.22	IN0020664	May 2027	Uncovered lagoons	14
Liberty WWTP	Liberty	0.18	IN0020681	May 2027	Clarifiers, Carrousels / oxidation ditches	2
Brooklyn WWTP	Brooklyn	0.14	IN0039772	May 2027	—	47
Western Rush Co Rwsd WWTP	Homer	0.05	IN0061531	May 2027	Clarifiers, Carrousels / oxidation ditches	4
St. Joe - Spencerville WWTP	St. Joe	0.05	IN0058441	May 2027	—	82
Francisco WWTP	Francisco	0.02	IN0061506	May 2027	—	6
Valley Rural Utility Company	Lawrenceburg	—	INJ043168	May 2027	Uncovered lagoons	—
Gary Sanitary District	Gary	32.6	IN0022977	Jun 2027	Clarifiers, Biogas silos, Biogas balloons	24
Linden Municipal WWTP	Linden	0.04	IN0040274	Jun 2027	Uncovered lagoons	8
Mexico Regional Sewer District	Mexico	0.03	IN0063959	Jun 2027	—	0
Alexandria WWTP	Alexandria	0.92	IN0020044	Jul 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	13
Nashville WWTP	Nashville	0.3	IN0023876	Jul 2027	Clarifiers	19
Monrovia WWTP	Monrovia	0.23	IN0060640	Jul 2027	—	8
Albany WWTP	Albany	0.15	IN0022136	Jul 2027	Clarifiers	7
Nature Works Conservancy District	Valparaiso	0.13	IN0058475	Jul 2027	—	3
Ladoga Municipal WWTP	Ladoga	0.1	IN0023418	Jul 2027	Clarifiers	23
South Central Rsd Caslon WWTP	Bloomington	0.09	IN0045187	Jul 2027	Aerated lagoons	10
Montgomery County Rsd - Nucor Road WWTP	Crawfordsville	0.08	IN0063967	Jul 2027	Uncovered lagoons	12
Amo-Coatesville Conservancy District WWTP	Amo	0.04	IN0043877	Jul 2027	Clarifiers, Carrousels / oxidation ditches	9
Freelandville Regional Sewer District	Freelandville	0.02	IN0064513	Jul 2027	—	12
Franklin Wwtp, City Of	Franklin	3.07	IN0021181	Aug 2027	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	18
Mccordsville Waste Water Treatment Plant	Mccordsville	0.7	IN0060542	Aug 2027	—	5
Morristown WWTP	Morristown	0.37	IN0023841	Aug 2027	Clarifiers, Carrousels / oxidation ditches	26
Town Of Fort Branch WWTP	Fort Branch	0.32	IN0022896	Aug 2027	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	13
North Judson Municipal WWTP	North Judson	0.24	IN0020877	Aug 2027	Clarifiers, Carrousels / oxidation ditches	8
Wolcottville WWTP	Wolcottville	0.11	IN0021229	Aug 2027	Clarifiers, Biogas balloons	42
Twin Lakes Rsd Snow Ditch WWTP	Monticello	0.06	IN0061581	Aug 2027	Clarifiers	1
Summit Springs Regional Waste District WWTP	Mount Summit	0.03	IN0049794	Aug 2027	—	9
Lake Bruce Conservancy District WWTP	Kewanna	0.0023	IN0062855	Aug 2027	—	13
Elden Kuehl Pollution Control Facility	Valparaiso	4.41	IN0024660	Sep 2027	Clarifiers, Biogas silos	3
Yorktown Wwtp, Town Of	Yorktown	0.81	IN0020150	Sep 2027	Clarifiers	1
Borden Wwtp, Town Of	Borden	0.21	IN0043621	Sep 2027	Clarifiers, Biogas silos	1
Tri-Lakes Regional Sewer District	Columbia City	0.13	IN0055166	Sep 2027	Uncovered lagoons	0
Fowler Municipal WWTP	Fowler	0.11	IN0050253	Sep 2027	Clarifiers, Aerated lagoons, Biogas balloons	1
Washington Township Water	New Washington	0.05	IN0109533	Sep 2027	Uncovered lagoons	5
Burnettsville WWTP	Burnettsville	0.02	IN0039802	Sep 2027	Uncovered lagoons	10
Fishers Cheeney Creek WWTP	Fishers	6.9	IN0055484	Oct 2027	Clarifiers	2
Chesterfield WWTP	Chesterfield	0.34	IN0063983	Oct 2027	—	72
Paragon WWTP	Paragon	0.03	IN0040479	Oct 2027	Uncovered lagoons	36
Boonville WWTP	Boonville	2.7	IN0022420	Nov 2027	Clarifiers	12
Veedersburg Municipal Water Supply	Veedersburg	0.31	IN0024716	Nov 2027	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	9
Twin Lakes Rsd/big Monon Bay	Monticello	0.25	IN0060887	Nov 2027	Clarifiers, Uncovered lagoons	0
Columbia City Water Department	Columbia City	1.34	IN0022624	Dec 2027	Clarifiers, Uncovered lagoons, Biogas balloons	46
Knox Municipal WWTP	Knox	0.31	IN0021385	Dec 2027	Clarifiers	0
Orleans Municipal WWTP	Orleans	0.12	IN0021601	Dec 2027	Clarifiers, Carrousels / oxidation ditches	36
Colfax Wwtp, Town Of	Colfax	0.06	IN0020443	Dec 2027	—	39
Matthews Wwtp, Town Of	Matthews	0.04	IN0040321	Dec 2027	Uncovered lagoons	2
Hamlet Municipal WWTP	Hamlet	0.03	IN0040100	Dec 2027	Uncovered lagoons	10

Indiana permit renewals in 2027: 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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