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Wastewater treatment plants in Tennessee

240 facilities · 399 MGD combined flow

Klarifi tracks 240 publicly owned wastewater treatment plants in Tennessee with a combined average flow of 399 MGD, serving about 2,698,882 residents. 51 plants treat more than 1 MGD and 5 more than 10 MGD; 76 use lagoon systems and 15 have digesters or biogas infrastructure. The largest is Metro Central Wastewater Treatment Plant in Nashville at 103.22 MGD. 16 NPDES permits expire this year and 42 next year.

Every plant below links to a profile with average and design flow, the NPDES permit and its expiry, a three-year compliance snapshot and the capital projects planned in its city. Treatment technology and verified contacts are shown with a free Klarifi account. Showing facilities 1–200 of 240 by average flow — browse the rest with the page links below.

240 plant locations in Tennessee; dot size follows average flow. Boundaries: U.S. Census Bureau.

NPDES permits and renewals in Tennessee

Every plant discharges under an NPDES permit that is renewed every five years, usually with tighter limits. The renewal year is the year a plant budgets for upgrades.

All NPDES permits in Tennessee →16 permits expiring in 2026 →42 permits expiring in 2027 →49 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in Tennessee

The 10 largest publicly owned wastewater treatment plants in Tennessee by average flow, with NPDES permit, expiry and three-year violation count. Source: EPA ICIS-NPDES via Klarifi.
FacilityCityAvg flow (MGD)Design (MGD)NPDES permitExpiresViolations (3y)
Metro Central Wastewater Treatment PlantNashville103.22—TNL020575Dec 203063
Moccasin Bend Wastewater Treatment PlantChattanooga50.56—TNR053775Jun 203051
Whites Creek Wastewater Treatment PlantNashville32.6437.5TN0024970Oct 202539
Nashville Dry Creek STPMadison16.2424TN0020648Oct 202534
City Of Cookeville Department Of Water Quality Control (wwtp)Cookeville10.7514TN0024198Jun 202727
City Of Franklin Wastewater Treatment PlantFranklin9.7716TN0028827Dec 202643
Kingsport STPKingsport9.612.4TN0020095Dec 202835
First U.D. Knox Co.-Turkey CrKnoxville8.4915TN0023353Apr 202723
Cleveland Utilities Wastewater Treatment PlantCharleston8.4821.6TN0024121Apr 202742
Hallsdale-Powell U.D.-Melton Hill LkKnoxville6.359.7TN0078905Sep 202843

Treatment technology for each plant is shown with a free Klarifi account. Create one →

The 50 largest plants in Tennessee →EPA enforcement actions in Tennessee →Tennessee capital improvement plans →

Tennessee plants by treatment technology

Activated sludge and clarifiers (83)Lagoon systems (76)Oxidation ditches (40)Anaerobic digesters and biogas (15)

All 240 plants in Tennessee

FacilityCityFlow (MGD)
Metro Central Wastewater Treatment PlantNashville103.22
Moccasin Bend Wastewater Treatment PlantChattanooga50.56
Whites Creek Wastewater Treatment PlantNashville32.64
Nashville Dry Creek STPMadison16.24
City Of Cookeville Department Of Water Quality Control (wwtp)Cookeville10.75
City Of Franklin Wastewater Treatment PlantFranklin9.77
Kingsport STPKingsport9.6
First U.D. Knox Co.-Turkey CrKnoxville8.49
Cleveland Utilities Wastewater Treatment PlantCharleston8.48
Hallsdale-Powell U.D.-Melton Hill LkKnoxville6.35
Johnson City STPJohnson City5.94
Harpeth Valley Utility District STPNashville5.88
City Of Columbia Wastewater Treatment PlantColumbia5.33
Turkey Creek WWTP (morristown Stp)Morristown5.12
Sevierville (mccroskey Island) STPSevierville4.74
Oak Ridge STPOak Ridge4.37
West Knox Ud Melton Lake WWTPKnoxville4.07
Dyersburg STPDyersburg3.87
City Of Spring Hill STPSpring Hill3.83
Collierville Northwest STPCollierville3.64
Knob Creek Waste Water PlantJohnson City3.26
Shelbyville Wastewater Treatment PlantShelbyville3.22
Humboldt Utilities AuthorityHumboldt3.13
Denzil Bowman Wastewater Treatment Plant (greeneville Stp)Greeneville3.1
Tullahoma STPTullahoma2.98
Dickson STPDickson2.91
Crossville STPCrossville2.81
Jackson Energy Auth- Middle FkJackson2.58
Manchester STPManchester2.4
Gatlinburg STPGatlinburg2.29
Clinton WWTP #1Clinton2.1
Lewisburg STPLewisburg2.07
Elizabethton WWTPElizabethton1.93
City Of Pulaski Wastewater Treatment PlantPulaski1.93
Lenoir City STPLenoir City1.78
Smithville STPSmithville1.73
Newport Utilities Board Wastewater Treatment PlantNewport1.65
Covington Wastewater Treatment PlantCovington1.63
Mcminnville Wastewater PlantMcminnville1.63
Town Of ColliervilleCollierville1.48
City Of SavannahSavannah1.44
Camden Hcr Lagoon And Spray IrrigationCamden1.42
Arlington STPArlington1.42
Ashland City Wastewater Treatment FacilityAshland City1.37
Martin STPMartin1.32
Town Of LivingstonLivingston1.18
City Of Portland 2021 Gravity Sewer InterceptorPortland1.18
Munford Sewer Department LagoonMunford1.15
Lexington Utilities- Waste Water Treatment PlantLexington1.13
Sweetwater STPSweetwater1.09
Selmer STPSelmer1
Sparta Electric And Public Works Dba Sparta Wastewater Treatment PlantSparta0.97
Etowah Utilities Board Dba Etowah Utilities Wastewater Treatment PlantEtowah0.97
Waverly STPWaverly0.91
City Of RogersvilleRogersville0.88
Jefferson City STPJefferson City0.85
Mountain City WWTPMountain City0.81
Trenton WWTPTrenton0.79
Huntingdon - Hwy 22 LagoonHuntingdon0.72
Erin STPErin0.68
Tiptonville - City LagoonTiptonville0.67
Caryville-Jacksboro Utilities Commission STPCaryville0.64
Lafayette STPLafayette0.6
Woodbury STPWoodbury0.57
Brownsville STPBrownsville0.57
Tellico Area Services System - Niles Ferry STPVonore0.56
Oliver Springs STPOliver Springs0.56
Madisonville STPMadisonville0.54
City Of Rocky Top STPRocky Top0.54
Hamilton County Wastewater Treatment Authority, Signal Mountain STPChattanooga0.54
Mckenzie STPMckenzie0.52
City Of KingstonKingston0.52
Lick Creek Valley (mosheim) Wastewater Treatment PlantMidway0.52
Claiborne Utilities DistrictTazewell0.52
Dunlap STPDunlap0.5
Fairview STPFairview0.49
Wartburg STPWartburg0.49
Somerville LagoonSomerville0.48
City Of RossvilleRossville0.46
Hartsville STPHartsville0.46
Waynesboro STPWaynesboro0.43
Parsons STPParsons0.43
Bartlett WWTP #2Arlington0.42
Knoxville Utilities Board - East Bridge STPMascot0.42
Spring City New Lake Rd PltSpring City0.42
Jellico Electric And Water SystemsJellico0.41
Jasper LagoonJasper0.38
Dresden Lagoon And Sewer SystemDresden0.38
Loretto STPLoretto0.37
Red Boiling Springs STPRed Boiling Springs0.37
Roane County STPRockwood0.36
New Johnsonville LagoonNew Johnsonville0.36
Henderson STP- South LagoonHenderson0.35
Mcewen STP Aka Mcewen WWTPMcewen0.34
Jamestown STPJamestown0.33
Dandridge STPDandridge0.31
Tellico Reservoir Development AgencyVonore0.31
Carthage STPCarthage0.3
Henderson STP- North LagoonHenderson0.3
Alamo STPAlamo0.3
Halls LagoonHalls0.29
White Pine STPWhite Pine0.28
White Bluff STP (aka Water Authority Of Dickson County)White Bluff0.28
City Of Sneedville STPSneedville0.27
Centerville STPCenterville0.27
Maynardville STPMaynardville0.26
Alexandria STPAlexandria0.26
West Tn State Penitentiary-Water PlantHenning0.26
Dyer STPDyer0.25
Bradford LagoonBradford0.24
Linden LagoonLinden0.24
Gleason STPGleason0.23
Monteagle Stp, Plant #3Monteagle0.23
Greenfield Wastewater LagoonGreenfield0.23
Watertown STPWatertown0.22
Dover STPDover0.22
Mount Carmel STPMt Carmel0.21
Huntingdon- Barnett Street LagoonHuntingdon0.2
Clifton STP #2Clifton0.2
Troy Wastewater LagoonTroy0.2
Baxter STPBaxter0.19
Lynchburg STPLynchburg0.19
Decatur STPDecatur0.19
Kenton LagoonKenton0.19
Gordonsville STPGordonsville0.18
Kingston Springs STPKingston Springs0.18
Cornersville STPCornersville0.18
Memphis Regional MegasiteStanton0.17
Henderson STP- East LagoonHenderson0.16
Decaturville WWTPDecaturville0.16
Gainesboro STPGainesboro0.15
Rutledge STPRutledge0.15
Obion Wastewater LagoonObion0.15
Sharon LagoonSharon0.13
Westmoreland STPWestmoreland0.13
Byrdstown STPByrdstown0.13
Englewood STPEnglewood0.12
Webb Creek U.D.Gatlinburg0.12
Middleton Wastewater LagoonMiddleton0.12
Benton STPBenton0.12
Trezevant STPTrezevant0.12
Niota STPNiota0.11
Norris STP (norris Water Commission)Norris0.11
Luttrell STPLuttrell0.11
Big Sandy STPBig Sandy0.1
Chapel Hill WWTPChapel Hill0.09
Tellico Plains STPTellico Plains0.09
Trimble STPTrimble0.09
Clifton Lagoon #1Clifton0.08
Baileyton CccGreeneville0.08
Buffalo WWTPHurricane Mills0.08
Spencer STPSpencer0.08
Tennessee Department Of Corrections Dba Bledsoe County Correction ComplexPikeville0.08
Cumberland Gap STPCumberland Gap0.07
Maury City Wastewater LagoonMaury City0.07
Hallsdale-Powell Raccoon Valley STPHeiskell0.07
Benton-Decatur Counties Special Sewer DistrictParsons0.07
Cowan STPCowan0.07
Stanton LagoonStanton0.07
Grand Junction Oxidation PondGrand Junction0.05
Bell Buckle STPBell Buckle0.05
Jea - Pinson LagoonPinson0.05
Cheatham County Industrial Park STPAshland City0.04
Toone STPToone0.04
Shelby County Government- Chapel Hill S.D. STPMemphis0.03
Lobelville Water Treatment PlantLobelville0.03
Dresden- Printing Factory LagoonDresden0.03
Drummonds Elementary SchoolDrummonds0.02
Clarksville Montgomery County School Montgomery CentralCunningham0.02
Nashville J.P.Priest Lake Hamilton Creek Recreation AreaNashville0.02
Tanasi Shores WWTPGallatin0.02
Cumberland City LagoonCumberland City0.02
Parrottsville STPParrottsville0.02
University Of Tennessee Space InstituteTullahoma0.01
Madison County Sheriff'S OfficeDenmark0.01
East Elementary SchoolJackson0.0086
Southwest Middle And ElementKingsport0.008
Washburn SchoolWashburn0.0073
Hampton High SchoolElizabethton0.007
Bethesda Elementary SchoolThompson'S Station0.0069
Clarksville Montgomery County School System - Woodlawn SchoolWoodlawn0.0063
Cherokee Comprehensive High SchoolRogersville0.0059
Sharp'S Chapel Elementary SchoolSharps Chapel0.0058
Central Heights Elementary SchoolBlountville0.0055
Coalfield SchoolHarriman0.0054
Trinity Elementary SchoolFranklin0.0051
Joppa Elementary SchoolRutledge0.0047
Hampton Elementary SchoolHampton0.0046
Tn Dot I-40 Cocke-Hartford Welcome CenterHartford0.0042
Appalachian Center For CraftsSmithville0.0036
Rush Strong SchoolStrawberry Plains0.0036
Roan Mountain State ParkRoan Mountain0.0036
Tdot I-24 Rest AreaJasper0.0035
Rogers Creek Elementary SchoolRiceville0.0034
Brushy Mountain State PenitentiaryPetros0.0034
Calhoun SchoolCalhoun0.0032
Hillsboro Elementary And Middle SchoolsFranklin0.0032
Oakdale SchoolOakdale0.0029
Cloudland SchoolRoan Mountain0.0028
Unity SchoolPetersburg0.0025

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Wastewater treatment in Tennessee: 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 19, 2026.

Wastewater terms: WWTP · POTW · MGD · NPDES permit · Significant industrial user · Biosolids · 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. “Wastewater treatment plants in Tennessee.” Updated October 19, 2026. https://klarifi.io/facilities/tennessee

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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