How many wastewater permits expire in Missouri in 2027?

65 NPDES permits held by publicly owned wastewater treatment plants in Missouri expire in 2027, covering a combined average flow of 8 MGD. The busiest month is Dec 2027 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 Missouri in 2027?

Kirksville WWTP in Kirksville, treating about 2.02 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, 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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Missouri wastewater permits expiring in 2027

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

65 NPDES permits · 8 MGD combined average flow

65 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 (46)2028 (69)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	Technology	Violations (3y)
Lake Forest Clean Water District WWTF	Ste. Genevieve	0.04	MO0035742	Feb 2027	—	145
Reeds Spring WWTP	Reeds Spring	0.12	MO0094137	Mar 2027	—	11
Lowry City Pws	Lowry City	0.09	MO0026671	Mar 2027	—	179
Steele Pws	Steele	0.08	MO0057444	Mar 2027	—	60
Osceola Municipal WWTF	Osceola	0.07	MO0093548	Mar 2027	—	30
Frankford WWTP	Frankford	0.02	MO0040134	Mar 2027	—	0
Higginsville I-70 North WWTF	Higginsville	0.01	MO0023094	Mar 2027	—	0
Houstonia WWTP	Houstonia	0.009	MO0058475	Mar 2027	—	44
Novinger WWTP	Novinger	0.009	MO0056987	Mar 2027	—	8
Millersburg Business Park WWTP	Millersburg	0.0081	MO0121100	Mar 2027	—	25
Higginsville Pws	Higginsville	0.002	MO0111848	Mar 2027	—	0
Licking Pws	Licking	0.33	MO0040118	Apr 2027	—	1
Stover Southwest WWTP	Stover	0.03	MO0047058	Apr 2027	—	68
Harrisonville Pws	Harrisonville	0.84	MO0028070	May 2027	Clarifiers, Uncovered lagoons, Biogas balloons	13
Holcomb WWTF	Holcomb	0.05	MO0022331	May 2027	—	68
Grandview Amenities WWTP	Lake Ozark	0.004	MO0139262	May 2027	—	3
Stanberry WWTF	Stanberry	0.14	MO0043231	Jun 2027	—	51
Bernie WWTP	Bernie	0.06	MO0048054	Jun 2027	—	72
Clarkton Pws	Clarkton	0.04	MO0052663	Jun 2027	—	130
Creighton WWTF	Creighton	0.04	MO0100102	Jun 2027	—	20
Linn Creek WWTP	Linn Creek	0.02	MO0111597	Jun 2027	—	0
Bell City WWTF	Bell City	0.01	MO0080594	Jun 2027	—	60
Beauty View Acres WWTF	Gray Summit	0.006	MO0109177	Jun 2027	Uncovered lagoons	157
Camdenton Business Park WWTP	Camdenton	0.003	MO0129607	Jun 2027	—	4
Appleton City WWTF	Appleton City	—	MO0021105	Jun 2027	Uncovered lagoons	66
Braymer WWTF	Braymer	0.14	MO0028061	Jul 2027	—	169
Crocker Pws-Well # 2 - Branch	Crocker	0.09	MO0094943	Jul 2027	—	80
Box Canyon Watershed WWTP	Branson	0.07	MO0129470	Jul 2027	—	38
Jcpsd, Sennawood Village WWTP	Cedar Hill	0.01	MO0106577	Jul 2027	—	16
Rhineland WWTP	Rhineland	0.0025	MO0117013	Jul 2027	—	17
Norwood Pws	Norwood	0.03	MO0103365	Aug 2027	—	18
Oak Ridge WWTP	Oak Ridge	0.01	MO0133086	Aug 2027	—	40
Emma North WWTF	Emma	0.009	MO0028592	Aug 2027	Uncovered lagoons	14
Washington County Pwsd 4 WWTP	Caledonia	—	MO0132519	Aug 2027	—	82
Higginsville South WWTF	Higginsville	0.29	MO0023108	Sep 2027	—	1
Npsd Antire Springs WWTP	High Ridge	0.02	MO0099252	Sep 2027	—	0
Wentworth WWTF	Wentworth	0.01	MO0120634	Sep 2027	—	10
Green Castle WWTF	Green Castle	0.004	MO0103322	Sep 2027	—	0
Green Ridge WWTF	Green Ridge	0.0016	MO0049654	Sep 2027	—	32
Benton WWTP	Benton	0.23	MO0055182	Oct 2027	—	72
Madison Pws	Madison	0.05	MO0096920	Oct 2027	Uncovered lagoons, Carrousels / oxidation ditches	0
Fcpwsd #3 Ad Deum Subdivision WWTP	Pacific	0.01	MO0106534	Oct 2027	—	5
St. Thomas WWTP	St. Thomas	0.0074	MO0133001	Oct 2027	—	12
Walnut Ridge	High Ridge	0.0036	MO0095281	Oct 2027	—	0
Fountain-N-Lake WWTF	Moscow Mills	0.002	MO0126101	Oct 2027	—	153
Parma Pws-Parma - Treatment Plant	Parma	—	MO0039900	Oct 2027	—	95
Sunrise Beach WWTP - Phase I	Sunrise Beach	0.02	MO0137278	Nov 2027	—	98
Fcpwsd #3 Red Barn WWTP	Villa Ridge	0.009	MO0043362	Nov 2027	—	16
Fcpwsd #3 Twin View WWTP	Villa Ridge	0.001	MO0119113	Nov 2027	—	19
Kirksville WWTP	Kirksville	2.02	MO0049506	Dec 2027	Clarifiers, Aerated lagoons, Uncovered lagoons	0
Cameron WWTP	Cameron	0.72	MO0104299	Dec 2027	—	7
Shawnee Bend	Sunrise Beach	0.6	MO0123722	Dec 2027	—	8
Lake Hannibal Estate WWTF	Hannibal	0.56	MO0094200	Dec 2027	—	3
Odessa SE WWTP	Odessa	0.22	MO0026387	Dec 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	0
Cgcrcsd, Fruitland WWTF	Jackson	0.16	MO0138631	Dec 2027	—	44
Jacksonville WWTF	Jacksonville	0.11	MO0097527	Dec 2027	Uncovered lagoons	12
Cgcrcsd, Cedar Meadows Subdivision WWTF	Jackson	0.08	MO0130729	Dec 2027	—	11
Hillsboro Brickyard Subdivision WWTP	Hillsboro	0.03	MO0133230	Dec 2027	—	0
Sunrise Beach WWTF - Phase Ii	Sunrise Beach	0.03	MO0139131	Dec 2027	—	131
Cgcrcsd Saddlebrooke Ridge WWTF	Jackson	0.01	MO0130087	Dec 2027	—	8
Iron Mountain Lake Lead	Bismarck	0.01	MO0122581	Dec 2027	—	117
Cgcrcsd Oak Creek Estates WWTP	Jackson	0.01	MO0132004	Dec 2027	—	10
Hillsboro Jamestown Mhp WWTF	Hillsboro	0.007	MO0127655	Dec 2027	—	0
Jcpsd, Golden Acres WWTF	House Springs	0.003	MO0139556	Dec 2027	—	21
Renick WWTF	Renick	—	MO0104019	Dec 2027	Uncovered lagoons	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 September 11, 2026.

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