How many wastewater permits expire in Missouri in 2028?

79 NPDES permits held by publicly owned wastewater treatment plants in Missouri expire in 2028, covering a combined average flow of 24 MGD. The busiest month is Mar 2028 with 13 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 2028?

Blue Springs, Sni A Bar WWTF in Grain Valley, treating about 4.89 MGD under permit MO0028886, expiring Nov 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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Missouri wastewater permits expiring in 2028

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

79 NPDES permits · 24 MGD combined average flow

79 publicly owned wastewater treatment plants in Missouri hold NPDES permits that expire during 2028, 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)2027 (79)All Missouri NPDES permits →

Publicly owned wastewater treatment plants in Missouri 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)
Syracuse Pws	Syracuse	0.15	MO0120111	Feb 2028	34
St. Jude Industrial Park Dwtp	New Madrid	0.23	MO0022845	Mar 2028	60
Edina WWTF	Edina	0.16	MO0099171	Mar 2028	0
Jasper WWTF	Jasper	0.15	MO0044202	Mar 2028	85
Hamilton NE WWTF	Hamilton	0.11	MO0022080	Mar 2028	73
Hillsboro North WWTF	Hillsboro	0.09	MO0129046	Mar 2028	18
Bloomsdale WPC Plant	Bloomsdale	0.06	MO0097110	Mar 2028	8
Jamesport WWTF	Jamesport	0.04	MO0087149	Mar 2028	8
Hamilton SE WWTF	Hamilton	0.03	MO0022071	Mar 2028	12
Hamilton SW Municipal WWTF	Hamilton	0.03	MO0022063	Mar 2028	19
Sheldon Pws	Sheldon	0.02	MO0040177	Mar 2028	53
Jcpsd Echo Valley Estates WWTP	House Springs	0.01	MO0100668	Mar 2028	3
Sylvan Manor-Sunset Acres WWTP	Pacific	0.01	MO0098043	Mar 2028	1
Drexel North WWTF	Drexel	—	MO0023655	Mar 2028	0
Bakersfield WWTP	Bakersfield	0.37	MO0128368	Apr 2028	22
Tarkio WWTF	Tarkio	0.13	MO0051608	Apr 2028	20
Sweet Springs WWTF	Sweet Springs	0.02	MO0054518	Apr 2028	408
Morley WWTF	Morley	0.01	MO0126195	Apr 2028	267
City Of Koshkonong WWTP	Koshkonong	0.01	MO0123404	Apr 2028	10
Jcpsd Woodridge Estates WWTP	House Springs	0.01	MO0103438	Apr 2028	0
Jcpsd Miller Crossing WWTP	House Springs	0.008	MO0124788	Apr 2028	0
Ccpwsd No. 4, Palisades Point WWTP	Four Seasons	0.0073	MO0139271	Apr 2028	1
Queen City WWTF	Queen City	0.0071	MO0093785	Apr 2028	23
Jcpsd House Springs Sr/early Ccc WWTP	House Springs	0.007	MO0100374	Apr 2028	2
Purdin WWTF	Purdin	0.0068	MO0125831	Apr 2028	86
Jcpsd Pine Grove Manor Apts WWTP	House Springs	0.005	MO0105201	Apr 2028	1
Npsd Terry Jean Acres WWTP	Fenton	0.0022	MO0092649	Apr 2028	0
Clinton WWTP	Clinton	1.32	MO0097390	May 2028	2
Jcpsd Yorktown WWTP	House Springs	0.06	MO0131024	May 2028	13
Barnard Pws-Barnard - Treatment Plant	Barnard	0.02	MO0041190	May 2028	35
Jcpsd Cedar Springs Elementary WWTP	House Springs	0.0087	MO0109304	May 2028	0
Brookside Parc	Hillsboro	0.0037	MO0134490	May 2028	5
Jcpsd Lakewood WWTF	Hillsboro	0.0037	MO0111431	May 2028	0
Pickering WWTF	Pickering	0.0033	MO0130133	May 2028	22
Nixa WWTF	Nixa	1.66	MO0028037	Jun 2028	16
Rogersville WWTP	Rogersville	0.37	MO0102679	Jun 2028	96
Clever Pws	Clever	0.18	MO0102318	Jun 2028	361
Brunswick WWTF	Brunswick	0.06	MO0032557	Jun 2028	31
Kingsville WWTF	Kingsville	0.04	MO0025844	Jun 2028	46
Fcpwsd No. 3 Little Fox Creek WWTP	Gray Summit	0.02	MO0111937	Jun 2028	21
Greentop WWTF	Kirksville	0.0094	MO0091642	Jun 2028	69
Kimmswick WWTP	Imperial	1.79	MO0106461	Aug 2028	2
Thayer WWTP	Thayer	0.22	MO0023132	Aug 2028	2
Jcpsd Mirasol WWTP	Eureka	0.15	MO0134147	Aug 2028	6
Marthasville WWTF	Marthasville	0.09	MO0044113	Aug 2028	87
Gordonville WWTP	Gordonville	0.04	MO0135615	Aug 2028	64
Jcpsd Wedgewood Village WWTP	Cedar Hill	0.0093	MO0105970	Aug 2028	0
Baring Area WWTF	Baring	0.005	MO0045811	Aug 2028	1
Kelso WWTF	Kelso	0.001	MO0115118	Aug 2028	77
Ozark WWTF	Ozark	0.99	MO0099163	Sep 2028	36
Elk Valley WWTF	Ozark	0.64	MO0133671	Sep 2028	3
Raintree Plantation	Hillsboro	0.36	MO0099473	Sep 2028	1
Rich Hill WWTF	Rich Hill	0.18	MO0092517	Sep 2028	62
Kidder WWTF	Kidder	0.08	MO0118591	Sep 2028	45
Wheeling WWTF	Wheeling	0.05	MO0097608	Sep 2028	5
Delta Pws	Delta	0.04	MO0052141	Sep 2028	29
Chula WWTP	Chula	0.03	MO0091146	Sep 2028	75
Hume WWTF	Hume	0.01	MO0114715	Sep 2028	23
Asbury WWTF	Asbury	0.00072	MO0114740	Sep 2028	15
Sedalia Southeast WWTP	Sedalia	2.48	MO0101567	Oct 2028	59
Sedalia Central WWTP	Sedalia	1.88	MO0023019	Oct 2028	52
Sedalia North WWTP	Sedalia	1.04	MO0023027	Oct 2028	133
Miner WWTF	Miner	0.18	MO0095133	Oct 2028	107
Gravois Arm Sewer District #2	Gravois Mills	0.15	MO0134821	Oct 2028	0
Linneus WWTF	Linneus	0.06	MO0093491	Oct 2028	0
Breckenridge WWTF	Breckenridge	0.05	MO0093891	Oct 2028	19
Bosworth WWTP	Bosworth	0.04	MO0135607	Oct 2028	4
Northwest Valley Middle School WWTF	House Springs	0.01	MO0044580	Oct 2028	18
Anniston Pws-Anniston - Treatment Plant	Anniston	0.01	MO0114928	Oct 2028	74
Blue Springs, Sni A Bar WWTF	Grain Valley	4.89	MO0028886	Nov 2028	16
Fulton WWTP	Fulton	1.8	MO0103331	Nov 2028	26
Clarence WWTF	Clarence	0.27	MO0041076	Nov 2028	12
Jcpsd Lower Big River WWTP	House Springs	0.24	MO0115428	Nov 2028	14
Glen Allen WWTF	Marble Hill	0.002	MO0133094	Nov 2028	1
Hillsboro WWTP	Hillsboro	0.22	MO0085383	Dec 2028	58
Golden City Pws-Treatment Well #3	Golden City	0.13	MO0031658	Dec 2028	28
Shelbyville WWTF	Shelbyville	0.06	MO0054704	Dec 2028	20
Cross Timbers WWTF	Cross Timbers	0.02	MO0135674	Dec 2028	37
Rockville Pws-Rockville	Rockville	0.01	MO0103748	Dec 2028	7

Missouri 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 · Lift station · Inflow and infiltration · 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: Missouri wastewater plants.” Updated October 26, 2026. https://klarifi.io/facilities/missouri/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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