How many wastewater permits expire in Indiana in 2028?

93 NPDES permits held by publicly owned wastewater treatment plants in Indiana expire in 2028, covering a combined average flow of 69 MGD. The busiest month is Jun 2028 with 16 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 2028?

Lafayette WWTP in Lafayette, treating about 18 MGD under permit IN0032468, expiring Jul 2028.

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

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

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Indiana wastewater permits expiring in 2028

Name: Indiana NPDES permits expiring in 2028
Creator: Klarifi
License: https://klarifi.io/terms-of-service

93 NPDES permits · 69 MGD combined average flow

93 publicly owned wastewater treatment plants in Indiana hold NPDES permits that expire during 2028, 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 (15)2027 (68)All Indiana NPDES permits →

Publicly owned wastewater treatment plants in Indiana with NPDES permits expiring in 2028, from EPA ICIS-NPDES records. Refreshed on every release.
Facility	City	Avg flow (MGD)	NPDES permit	Expires	Violations (3y)
Pittsboro WWTP	Pittsboro	0.73	IN0020401	Jan 2028	22
Roachdale Municipal WWTP	Roachdale	0.1	IN0020052	Jan 2028	7
New Whiteland Waste Water Tre	New Whiteland	0.47	IN0020966	Feb 2028	32
Brookville WWTP	Brookville	0.39	IN0022446	Feb 2028	1
Paoli Municipal WWTP	Paoli	0.38	IN0024023	Feb 2028	92
Romney Rsd WWTP	Romney	0.01	IN0064599	Feb 2028	2
Swayzee Wwtp, Town Of	Swayzee	0.17	IN0037001	Mar 2028	87
Jamestown WWTP	Jamestown	0.13	IN0021318	Mar 2028	1
Palmyra WWTP	Palmyra	0.1	IN0039403	Mar 2028	64
Lauramie Township Rsd	Stockwell	0.03	IN0061964	Mar 2028	1
Wingate Municipal WWTP	Wingate	0.02	IN0040771	Mar 2028	76
Prophetstown State Park Aquatic Center	West Lafayette	—	IN0064068	Mar 2028	1
Plainfield North Water Pollution Control Facility	Plainfield	2.4	IN0021202	Apr 2028	11
Rising Sun, City Of	Rising Sun	0.16	IN0024431	Apr 2028	2
West Lakes Regional Sewer District	Wawaka	0.06	IN0063088	Apr 2028	8
Mooreland Env. Control Center WWTP	Mooreland	0.05	IN0040398	Apr 2028	9
Huntington WWTP	Huntington	4.95	IN0023132	May 2028	9
Portland WWTP	Portland	1.5	IN0020095	May 2028	52
Syracuse Water Company-Treatment Plant #4	Syracuse	0.45	IN0021172	May 2028	18
Turkey Creek Regional Sewer District-Treatment Plant	Cromwell	0.33	IN0045802	May 2028	14
Mapleturn Utilities, Inc.-Treatment Plant	Martinsville	0.13	IN0049361	May 2028	8
Bunker Hill Wwtp, Town Of	Bunker Hill	0.09	IN0020206	May 2028	3
Bainbridge Municipal WWTP	Bainbridge	0.06	IN0040941	May 2028	16
Uniondale WWTP	Uniondale	0.01	IN0051098	May 2028	2
Washington WWTP	Washington	3.2	IN0025658	Jun 2028	130
Whiteland WWTP	Whiteland	0.7	IN0021415	Jun 2028	15
Bicknell Municipal WWTP	Bicknell	0.6	IN0039276	Jun 2028	20
Corydon WWTP	Corydon	0.53	IN0020893	Jun 2028	21
Knightstown WWTP	Knightstown	0.48	IN0040177	Jun 2028	22
Middletown WWTP	Middletown	0.37	IN0020770	Jun 2028	78
Osgood WWTP	Osgood	0.32	IN0021695	Jun 2028	23
Churubusco Municipal STP	Churubusco	0.23	IN0021113	Jun 2028	17
Dale Municipal WWTP	Dale	0.2	IN0021598	Jun 2028	0
South Whitley WWTP	South Whitley	0.16	IN0020567	Jun 2028	0
Jefferson Township Rsd	Otwell	0.11	IN0046361	Jun 2028	1
Michigantown Municipal WWTP	Michigantown	0.07	IN0040355	Jun 2028	12
Fulton Municipal WWTP	Fulton	0.04	IN0060101	Jun 2028	8
Greens Fork WWTP	Greens Fork	0.03	IN0061841	Jun 2028	4
Hartsville WWTP	Hartsville	0.03	IN0021075	Jun 2028	2
South Central Indiana Rsd Stinesville WWTP	Stinesville	0.02	IN0050105	Jun 2028	0
Shoals WWTP	Shoals	—	IN0040631	Jul 2028	30
Lafayette WWTP	Lafayette	18	IN0032468	Jul 2028	0
Schererville WWTP	Schererville	6.55	IN0024457	Jul 2028	8
Salem WWTP	Salem	1.46	IN0021644	Jul 2028	34
Gas City WWTP	Gas City	0.82	IN0022985	Jul 2028	2
Glenwood WWTP	Glenwood	0.12	IN0061778	Jul 2028	7
Lynnville WWTP	Lynnville	0.09	IN0040282	Jul 2028	2
Leavenworth WWTP	Leavenworth	0.09	IN0021121	Jul 2028	8
Stilesville WWTP	Stilesville	0.06	IN0059986	Jul 2028	0
Denver Municipal WWTP	Denver	0.03	IN0039934	Jul 2028	1
Gentryville WWTP	Gentryville	—	IN0060038	Jul 2028	1
Morgantown Water Utility-Treatment Plant #1	Morgantown	—	IN0036820	Jul 2028	31
Princeton WWTP	Princeton	2.07	IN0024392	Aug 2028	10
Covington WWTP	Covington	0.23	IN0025828	Aug 2028	0
Frankton WWTP	Frankton	0.21	IN0020028	Aug 2028	4
Eaton WWTP	Eaton	0.2	IN0021652	Aug 2028	24
Topeka WWTP	Topeka	0.13	IN0021571	Aug 2028	33
Windfall WWTP	Windfall	0.13	IN0040762	Aug 2028	97
Cromwell WWTP	Cromwell	0.1	IN0021814	Aug 2028	1
Mulberry WWTP	Mulberry	0.1	IN0031976	Aug 2028	9
Western Wayne Regional Sewer District WWTP	Cambridge City	0.95	IN0054402	Sep 2028	3
Odon WWTP	Odon	0.29	IN0020214	Sep 2028	11
Shirley WWTP	Shirley	0.2	IN0024503	Sep 2028	17
Lakeland Regional Sewer District	Warsaw	0.13	IN0064131	Sep 2028	3
Holland WWTP	Holland	0.12	IN0023108	Sep 2028	37
Boswell WWTP	Boswell	0.1	IN0039756	Sep 2028	6
Moores Hill WWTP	Moores Hill	0.06	IN0023817	Sep 2028	4
Tipton/ Getrag Division E WWTP	Tipton	—	IN0063215	Sep 2028	15
Dyer Wastewater Treatment Plant	Dyer	1.9	IN0039331	Oct 2028	1
Mitchell Wastewater Treatment Plant	Mitchell	0.38	IN0023787	Oct 2028	4
Hebron Wastewater Treatment Plant	Hebron	0.37	IN0020061	Oct 2028	5
Williamsport Wastewater Treatment Plant	Williamsport	—	IN0024864	Oct 2028	0
Carmel WWTP	Indianapolis	7.69	IN0022497	Nov 2028	2
Union City WWTP	Union City	0.64	IN0020982	Nov 2028	3
Patoka Lake Regional Water-Treatment Plant #1	Dubois	0.39	IN0052698	Nov 2028	9
Walkerton Municipal WWTP	Walkerton	0.2	IN0040690	Nov 2028	16
Galveston Wastewater Treatment Plant	Galveston	0.13	IN0021199	Nov 2028	2
La Crosse Wastewater Treatment Plant	La Crosse	0.09	IN0040193	Nov 2028	64
Bryant WWTP	Bryant	0.02	IN0055158	Nov 2028	18
Rockfield Regional Sewer District Wastewater Treatment Plant	Rockfield	0.0068	IN0061921	Nov 2028	9
English WWTP	English	—	IN0039993	Nov 2028	48
Fountain City Water Works	Fountain City	—	IN0040029	Nov 2028	6
Bedford Wastewater Treatment Plant	Bedford	2.39	IN0025623	Dec 2028	4
Zionsville WWTP	Zionsville	1.18	IN0036951	Dec 2028	11
Dunkirk WWTP	Dunkirk	0.47	IN0021491	Dec 2028	59
Fremont Wastewater Treatment Plant	Fremont	0.34	IN0022942	Dec 2028	4
Attica Municipal WWTP	Attica	0.24	IN0020222	Dec 2028	8
Anderson Township Regional Sewer Dist.	Milroy	0.2	IN0109746	Dec 2028	6
Sunman Waste Water Treatment	Sunman	0.19	IN0021679	Dec 2028	141
New Pekin Wastewater Treatment Plant	Pekin	0.15	IN0021059	Dec 2028	1
Waldron Conservancy District	Waldron	0.11	IN0024783	Dec 2028	38
Carbon Municipal STP	Carbon	0.03	IN0039829	Dec 2028	5
Pipe Creek Rest Area I-69	Gaston	0.0043	IN0031356	Dec 2028	0

Indiana permit renewals in 2028: 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: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · Equalization tank · Centrate · 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. “NPDES permits expiring in 2028: Indiana wastewater plants.” Updated October 26, 2026. https://klarifi.io/facilities/indiana/permits-expiring/2028

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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