How many wastewater permits expire in Tennessee in 2027?

41 NPDES permits held by publicly owned wastewater treatment plants in Tennessee expire in 2027, covering a combined average flow of 36 MGD. The busiest month is Aug 2027 with 6 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 Tennessee in 2027?

City Of Cookeville Department Of Water Quality Control (wwtp) in Cookeville, treating about 9.62 MGD under permit TN0024198, expiring Jun 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.

Try for free Log in

Tennessee wastewater permits expiring in 2027

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

41 NPDES permits · 36 MGD combined average flow

41 publicly owned wastewater treatment plants in Tennessee hold NPDES permits that expire during 2027, issued by Tennessee Department of Environment and Conservation. 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 (16)2028 (47)All Tennessee NPDES permits →

Publicly owned wastewater treatment plants in Tennessee 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)
Trenton WWTP	Trenton	0.64	TN0078271	Jan 2027	Aerated lagoons	0
Cowan STP	Cowan	0.09	TN0021644	Jan 2027	Clarifiers, Carrousels / oxidation ditches	0
Niota STP	Niota	0.05	TN0025470	Jan 2027	Clarifiers	2
Richland School	Lynnville	0.0029	TN0054810	Feb 2027	—	19
Cleveland Utilities Wastewater Treatment Plant	Charleston	6.59	TN0024121	Apr 2027	Clarifiers, Aerated lagoons	43
Bartlett WWTP #2	Arlington	0.35	TN0068543	Apr 2027	Aerated lagoons	4
University Of Tennessee Space Institute	Tullahoma	0.02	TN0067202	Apr 2027	—	1
E.E. Jeter School	Millington	0.002	TN0023833	Apr 2027	—	6
Pleasant Hill Housing Project	Pleasant Hill	0.001	TN0027618	Apr 2027	—	1
Jackson Energy Auth- Middle Fk	Jackson	2.45	TN0075876	May 2027	—	6
Etowah Utilities Board Dba Etowah Utilities Wastewater Treatment Plant	Etowah	0.69	TN0063771	May 2027	Clarifiers, Carrousels / oxidation ditches	17
City Of Cookeville Department Of Water Quality Control (wwtp)	Cookeville	9.62	TN0024198	Jun 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	27
Baxter STP	Baxter	0.13	TN0021121	Jun 2027	Clarifiers	13
Appalachian Center For Crafts	Smithville	0.0024	TN0055409	Jun 2027	—	5
Nashville J.P.Priest Lake Hamilton Creek Recreation Area	Nashville	0.0015	TN0028550	Jun 2027	—	3
Tullahoma STP	Tullahoma	2.2	TN0023469	Jul 2027	Aerated lagoons	6
Alamo STP	Alamo	0.23	TN0024988	Jul 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches, Biogas silos	174
Alexandria STP	Alexandria	0.22	TN0021539	Jul 2027	—	165
Dyer STP	Dyer	0.18	TN0021563	Jul 2027	Clarifiers, Carrousels / oxidation ditches	15
Shelby County Government- Chapel Hill S.D. STP	Memphis	0.02	TN0026361	Jul 2027	—	22
Humboldt Utilities Authority	Humboldt	3.04	TN0062588	Aug 2027	Aerated lagoons	7
Lynchburg STP	Lynchburg	0.11	TN0025101	Aug 2027	—	6
Englewood STP	Englewood	0.07	TN0021938	Aug 2027	Carrousels / oxidation ditches	6
East Elementary School	Jackson	0.0082	TN0056481	Aug 2027	—	1
Unity School	Petersburg	0.0028	TN0065498	Aug 2027	—	8
Elkton STP	Elkton	0.000082	TN0076007	Aug 2027	—	35
Smithville STP	Smithville	1.47	TN0065358	Sep 2027	Uncovered lagoons	1
Sparta Electric And Public Works Dba Sparta Wastewater Treatment Plant	Sparta	0.84	TN0061166	Sep 2027	Uncovered lagoons	24
Loretto STP	Loretto	0.17	TN0065501	Sep 2027	Aerated lagoons	17
Monteagle Stp, Plant #3	Monteagle	0.15	TN0080985	Sep 2027	—	10
City Of Pulaski Wastewater Treatment Plant	Pulaski	1.4	TN0021687	Oct 2027	Clarifiers, Uncovered lagoons	2
Somerville Lagoon	Somerville	0.28	TN0021652	Oct 2027	Uncovered lagoons	24
Spencer STP	Spencer	0.09	TN0077691	Oct 2027	—	0
Calhoun School	Calhoun	0.0042	TN0054828	Oct 2027	—	4
Fayette County D/b/a Arlington Mobile Park Lagoon	Arlington	—	TN0081027	Oct 2027	Uncovered lagoons	10
Mason STP	Mason	—	TN0026620	Oct 2027	Aerated lagoons	17
Arlington STP	Arlington	1.27	TN0078603	Nov 2027	Aerated lagoons	99
Cornersville STP	Cornersville	0.09	TN0061841	Nov 2027	—	27
Rogers Creek Elementary School	Riceville	0.0036	TN0067555	Nov 2027	—	10
Tdot I-65 Welcome Center - Giles County	Ardmore	0.0017	TN0074331	Nov 2027	—	8
Dyersburg STP	Dyersburg	3.12	TN0023477	Dec 2027	Clarifiers, Aerated lagoons	20

Tennessee 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.

Try Klarifi for free

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

Try for free