How many wastewater permits expire in Missouri in 2028?

69 NPDES permits held by publicly owned wastewater treatment plants in Missouri expire in 2028, covering a combined average flow of 17 MGD. The busiest month is Apr 2028 with 12 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 3.5 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, 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.

Try for free Log in

Missouri wastewater permits expiring in 2028

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

69 NPDES permits · 17 MGD combined average flow

69 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 (46)2027 (65)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	Technology	Violations (3y)
Hillsboro North WWTF	Hillsboro	0.28	MO0129046	Mar 2028	—	18
St. Jude Industrial Park Dwtp	New Madrid	0.22	MO0022845	Mar 2028	—	60
Jasper WWTF	Jasper	0.16	MO0044202	Mar 2028	—	85
Edina WWTF	Edina	0.13	MO0099171	Mar 2028	—	0
Bloomsdale WPC Plant	Bloomsdale	0.06	MO0097110	Mar 2028	—	8
Hamilton NE WWTF	Hamilton	0.04	MO0022080	Mar 2028	—	74
Jamesport WWTF	Jamesport	0.04	MO0087149	Mar 2028	—	8
Hamilton SE WWTF	Hamilton	0.03	MO0022071	Mar 2028	—	13
Jcpsd Echo Valley Estates WWTP	House Springs	0.01	MO0100668	Mar 2028	—	3
Sylvan Manor-Sunset Acres WWTP	Pacific	0.0085	MO0098043	Mar 2028	—	1
Hamilton SW Municipal WWTF	Hamilton	0.0079	MO0022063	Mar 2028	—	19
Bakersfield WWTP	Bakersfield	0.51	MO0128368	Apr 2028	—	25
Tarkio WWTF	Tarkio	0.16	MO0051608	Apr 2028	—	19
Morley WWTF	Morley	0.01	MO0126195	Apr 2028	—	273
Jcpsd Woodridge Estates WWTP	House Springs	0.01	MO0103438	Apr 2028	—	0
City Of Koshkonong WWTP	Koshkonong	0.01	MO0123404	Apr 2028	—	10
Queen City WWTF	Queen City	0.01	MO0093785	Apr 2028	—	25
Jcpsd Miller Crossing WWTP	House Springs	0.007	MO0124788	Apr 2028	—	0
Jcpsd House Springs Sr/early Ccc WWTP	House Springs	0.005	MO0100374	Apr 2028	—	2
Ccpwsd No. 4, Palisades Point WWTP	Four Seasons	0.002	MO0139271	Apr 2028	—	1
Npsd Terry Jean Acres WWTP	Fenton	0.0018	MO0092649	Apr 2028	—	0
Jcpsd Pine Grove Manor Apts WWTP	House Springs	0.0002	MO0105201	Apr 2028	—	1
Sweet Springs WWTF	Sweet Springs	—	MO0054518	Apr 2028	Uncovered lagoons	438
Clinton WWTP	Clinton	1.09	MO0097390	May 2028	Clarifiers, Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches	2
Jcpsd Yorktown WWTP	House Springs	0.07	MO0131024	May 2028	—	13
Barnard Pws-Barnard - Treatment Plant	Barnard	0.02	MO0041190	May 2028	—	37
Jcpsd Cedar Springs Elementary WWTP	House Springs	0.007	MO0109304	May 2028	—	0
Pickering WWTF	Pickering	0.0031	MO0130133	May 2028	—	24
Brookside Parc	Hillsboro	0.003	MO0134490	May 2028	—	5
Jcpsd Lakewood WWTF	Hillsboro	0.003	MO0111431	May 2028	—	0
Nixa WWTF	Nixa	1.52	MO0028037	Jun 2028	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	16
Rogersville WWTP	Rogersville	0.29	MO0102679	Jun 2028	—	97
Clever Pws	Clever	0.15	MO0102318	Jun 2028	—	360
Jcpsd Fisher Road WWTP	House Springs	0.04	MO0126926	Jun 2028	—	0
Brunswick WWTF	Brunswick	0.04	MO0032557	Jun 2028	—	51
Jcpsd Sycamore Springs Mhp WWTP	House Springs	0.03	MO0108642	Jun 2028	—	1
Fcpwsd No. 3 Little Fox Creek WWTP	Gray Summit	0.02	MO0111937	Jun 2028	—	19
Greentop WWTF	Kirksville	0.009	MO0091642	Jun 2028	—	71
Kingsville WWTF	Kingsville	0.0075	MO0025844	Jun 2028	—	47
Kimmswick WWTP	Imperial	1.42	MO0106461	Aug 2028	Uncovered lagoons	2
Thayer WWTP	Thayer	0.25	MO0023132	Aug 2028	—	2
Jcpsd Mirasol WWTP	Eureka	0.13	MO0134147	Aug 2028	—	22
Marthasville WWTF	Marthasville	0.09	MO0044113	Aug 2028	—	87
Kelso WWTF	Kelso	0.03	MO0115118	Aug 2028	—	79
Jcpsd Wedgewood Village WWTP	Cedar Hill	0.009	MO0105970	Aug 2028	—	0
Ozark WWTF	Ozark	1.03	MO0099163	Sep 2028	Clarifiers, Carrousels / oxidation ditches	36
Elk Valley WWTF	Ozark	0.49	MO0133671	Sep 2028	—	3
Raintree Plantation	Hillsboro	0.22	MO0099473	Sep 2028	—	1
Rich Hill WWTF	Rich Hill	0.07	MO0092517	Sep 2028	—	62
Kidder WWTF	Kidder	0.06	MO0118591	Sep 2028	—	45
Hume WWTF	Hume	0.008	MO0114715	Sep 2028	—	39
Asbury WWTF	Asbury	0.0051	MO0114740	Sep 2028	—	15
Sedalia Central WWTP	Sedalia	1.28	MO0023019	Oct 2028	Clarifiers, Aerated lagoons, Uncovered lagoons	57
Sedalia Southeast WWTP	Sedalia	0.77	MO0101567	Oct 2028	Clarifiers, Carrousels / oxidation ditches	59
Sedalia North WWTP	Sedalia	0.58	MO0023027	Oct 2028	Clarifiers	139
Miner WWTF	Miner	0.21	MO0095133	Oct 2028	—	107
Gravois Arm Sewer District #2	Gravois Mills	0.12	MO0134821	Oct 2028	—	0
Breckenridge WWTF	Breckenridge	0.03	MO0093891	Oct 2028	—	16
Northwest Valley Middle School WWTF	House Springs	0.03	MO0044580	Oct 2028	—	18
Bosworth WWTP	Bosworth	—	MO0135607	Oct 2028	Uncovered lagoons	4
Blue Springs, Sni A Bar WWTF	Grain Valley	3.5	MO0028886	Nov 2028	Clarifiers, Aerated lagoons, Uncovered lagoons	16
Fulton WWTP	Fulton	1.37	MO0103331	Nov 2028	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	17
Jcpsd Lower Big River WWTP	House Springs	0.17	MO0115428	Nov 2028	—	14
Glen Allen WWTF	Marble Hill	0.00096	MO0133094	Nov 2028	—	2
Hillsboro WWTP	Hillsboro	0.18	MO0085383	Dec 2028	—	58
Golden City Pws-Treatment Well #3	Golden City	0.03	MO0031658	Dec 2028	—	28
Cross Timbers WWTF	Cross Timbers	0.02	MO0135674	Dec 2028	—	37
Rockville Pws-Rockville	Rockville	0.01	MO0103748	Dec 2028	—	5
Shelbyville WWTF	Shelbyville	0.0085	MO0054704	Dec 2028	—	22

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 September 11, 2026.

Try Klarifi for free

Create your own trial account and explore how Klarifi can help you.

Try for free