How many wastewater permits expire in Missouri in 2027?

79 NPDES permits held by publicly owned wastewater treatment plants in Missouri expire in 2027, covering a combined average flow of 12 MGD. The busiest month is Dec 2027 with 20 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 Missouri in 2027?

Kirksville WWTP in Kirksville, treating about 2.71 MGD under permit MO0049506, expiring Dec 2027.

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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Missouri wastewater permits expiring in 2027

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

79 NPDES permits · 12 MGD combined average flow

79 publicly owned wastewater treatment plants in Missouri hold NPDES permits that expire during 2027, issued by Missouri Department of Natural Resources. 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 (54)2028 (79)All Missouri NPDES permits →

Publicly owned wastewater treatment plants in Missouri with NPDES permits expiring in 2027, from EPA ICIS-NPDES records. Refreshed on every release.
Facility	City	Avg flow (MGD)	NPDES permit	Expires	Violations (3y)
Lake Forest Clean Water District WWTF	Ste. Genevieve	0.07	MO0035742	Feb 2027	144
Reeds Spring WWTP	Reeds Spring	0.46	MO0094137	Mar 2027	11
Steele Pws	Steele	0.14	MO0057444	Mar 2027	63
Osceola Municipal WWTF	Osceola	0.13	MO0093548	Mar 2027	30
Lowry City Pws	Lowry City	0.07	MO0026671	Mar 2027	181
Utica WWTF	Utica	0.04	MO0125679	Mar 2027	1
Frankford WWTP	Frankford	0.02	MO0040134	Mar 2027	0
Higginsville I-70 North WWTF	Higginsville	0.01	MO0023094	Mar 2027	0
Houstonia WWTP	Houstonia	0.01	MO0058475	Mar 2027	44
Novinger WWTP	Novinger	0.0054	MO0056987	Mar 2027	8
Millersburg Business Park WWTP	Millersburg	0.0042	MO0121100	Mar 2027	20
Higginsville Pws	Higginsville	0.0041	MO0111848	Mar 2027	0
Licking Pws	Licking	0.42	MO0040118	Apr 2027	1
Stover Southwest WWTP	Stover	0.1	MO0047058	Apr 2027	68
Harrisonville Pws	Harrisonville	1.2	MO0028070	May 2027	13
Holcomb WWTF	Holcomb	0.59	MO0022331	May 2027	69
Grandview Amenities WWTP	Lake Ozark	0.03	MO0139262	May 2027	3
Blackwater	Blackwater	0.49	MO0101648	Jun 2027	119
Stanberry WWTF	Stanberry	0.15	MO0043231	Jun 2027	51
Bernie WWTP	Bernie	0.06	MO0048054	Jun 2027	72
Appleton City WWTF	Appleton City	0.06	MO0021105	Jun 2027	66
Laclede WWTF	Laclede	0.06	MO0092932	Jun 2027	120
Creighton WWTF	Creighton	0.05	MO0100102	Jun 2027	19
Clarkton Pws	Clarkton	0.04	MO0052663	Jun 2027	144
Bell City WWTF	Bell City	0.04	MO0080594	Jun 2027	59
Cowgill WWTP	Cowgill	0.03	MO0130052	Jun 2027	68
Linn Creek WWTP	Linn Creek	0.02	MO0111597	Jun 2027	0
Beauty View Acres WWTF	Gray Summit	0.0055	MO0109177	Jun 2027	159
Camdenton Business Park WWTP	Camdenton	0.0039	MO0129607	Jun 2027	4
Sturgeon WWTP	Sturgeon	—	MO0052027	Jun 2027	0
Crocker Pws-Well # 2 - Branch	Crocker	0.16	MO0094943	Jul 2027	81
Braymer WWTF	Braymer	0.15	MO0028061	Jul 2027	156
Box Canyon Watershed WWTP	Branson	0.06	MO0129470	Jul 2027	38
La Monte NW WWTF	La Monte	0.01	MO0108090	Jul 2027	3
Jcpsd, Sennawood Village WWTP	Cedar Hill	0.01	MO0106577	Jul 2027	16
Rhineland WWTP	Rhineland	0.0028	MO0117013	Jul 2027	15
Emma North WWTF	Emma	0.07	MO0028592	Aug 2027	14
Norwood Pws	Norwood	0.03	MO0103365	Aug 2027	18
Oak Ridge WWTP	Oak Ridge	0.01	MO0133086	Aug 2027	40
Washington County Pwsd 4 WWTP	Caledonia	0.004	MO0132519	Aug 2027	81
Higginsville South WWTF	Higginsville	0.42	MO0023108	Sep 2027	1
Green Castle WWTF	Green Castle	0.04	MO0103322	Sep 2027	0
Green Ridge WWTF	Green Ridge	0.03	MO0049654	Sep 2027	32
Npsd Antire Springs WWTP	High Ridge	0.02	MO0099252	Sep 2027	0
Wentworth WWTF	Wentworth	0.01	MO0120634	Sep 2027	10
Riverwood Ii Estates WWTF	Warrensburg	0.01	MO0113905	Sep 2027	31
Parma Pws-Parma - Treatment Plant	Parma	1.1	MO0039900	Oct 2027	96
Benton WWTP	Benton	0.23	MO0055182	Oct 2027	74
Walker WWTF	Walker	0.08	MO0103942	Oct 2027	14
Madison Pws	Madison	0.04	MO0096920	Oct 2027	0
Fcpwsd #3 Ad Deum Subdivision WWTP	Pacific	0.01	MO0106534	Oct 2027	5
St. Thomas WWTP	St. Thomas	0.009	MO0133001	Oct 2027	12
Walnut Ridge	High Ridge	0.0041	MO0095281	Oct 2027	0
Fountain-N-Lake WWTF	Moscow Mills	0.0037	MO0126101	Oct 2027	133
Columbia Regional Airport	Columbia	—	MOR80F011	Nov 2027	339
Downing Pws	Downing	0.53	MO0109240	Nov 2027	0
Sunrise Beach WWTP - Phase I	Sunrise Beach	0.02	MO0137278	Nov 2027	100
Fcpwsd #3 Twin View WWTP	Villa Ridge	0.003	MO0119113	Nov 2027	19
Fcpwsd #3 Red Barn WWTP	Villa Ridge	—	MO0043362	Nov 2027	16
Kirksville WWTP	Kirksville	2.71	MO0049506	Dec 2027	0
Cameron WWTP	Cameron	0.91	MO0104299	Dec 2027	6
Odessa SE WWTP	Odessa	0.34	MO0026387	Dec 2027	0
Cgcrcsd, Fruitland WWTF	Jackson	0.14	MO0138631	Dec 2027	44
Shawnee Bend	Sunrise Beach	0.11	MO0123722	Dec 2027	8
Jacksonville WWTF	Jacksonville	0.09	MO0097527	Dec 2027	13
Mindenmines WWTF	Mindenmines	0.04	MO0116581	Dec 2027	18
Hillsboro Brickyard Subdivision WWTP	Hillsboro	0.03	MO0133230	Dec 2027	0
Iron Mountain Lake Lead	Bismarck	0.03	MO0122581	Dec 2027	114
Silex WWTF	Silex	0.02	MO0108243	Dec 2027	109
Sunrise Beach WWTF - Phase Ii	Sunrise Beach	0.02	MO0139131	Dec 2027	132
Cgcrcsd, Highlands Ranch Subdivision	Jackson	0.02	MO0139220	Dec 2027	7
Cgcrcsd Saddlebrooke Ridge WWTF	Jackson	0.01	MO0130087	Dec 2027	8
Lake Hannibal Estate WWTF	Hannibal	0.01	MO0094200	Dec 2027	3
Cgcrcsd Oak Creek Estates WWTP	Jackson	0.01	MO0132004	Dec 2027	9
Armstrong WWTP	Armstrong	0.0094	MO0093084	Dec 2027	43
Hillsboro Jamestown Mhp WWTF	Hillsboro	0.0087	MO0127655	Dec 2027	0
Cgcrcsd Seabaugh Acres WWTF	Jackson	0.008	MO0056651	Dec 2027	19
Jcpsd, Golden Acres WWTF	House Springs	0.0033	MO0139556	Dec 2027	0
Renick WWTF	Renick	—	MO0104019	Dec 2027	0

Missouri 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 October 26, 2026.

Wastewater terms: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · MGD · Lift station · 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 2027: Missouri wastewater plants.” Updated October 26, 2026. https://klarifi.io/facilities/missouri/permits-expiring/2027

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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