How many wastewater treatment plants are there in Kentucky?

Klarifi tracks 193 publicly owned wastewater treatment plants in Kentucky with a combined average flow of 184 million gallons per day, serving about 1,483,541 residents. 23 of them treat more than 1 MGD and 2 more than 10 MGD.

What is the largest wastewater treatment plant in Kentucky?

Msd, Morris Forman Plant in Louisville is the largest plant in Kentucky by average flow, treating about 56.18 MGD.

What treatment technologies are common in Kentucky?

74 of Kentucky's plants use lagoon systems and 5 have biogas or anaerobic digestion infrastructure, based on Klarifi's aerial imagery review.

How many NPDES permits in Kentucky are up for renewal?

20 permits held by Kentucky plants expire in 2026 and 19 in 2027. Renewals typically bring new limits and trigger upgrade projects.

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Wastewater Treatment Plants in Kentucky

Name: Wastewater treatment plants in Kentucky
Creator: Klarifi
License: https://klarifi.io/terms-of-service

193 facilities · 184 MGD combined flow

Klarifi tracks 193 publicly owned wastewater treatment plants in Kentucky with a combined average flow of 184 MGD, serving about 1,483,541 residents. 23 plants treat more than 1 MGD and 2 more than 10 MGD; 74 use lagoon systems and 5 have digesters or biogas infrastructure. The largest is Msd, Morris Forman Plant in Louisville at 56.18 MGD. 20 NPDES permits expire this year and 19 next year.

Every plant below links to a profile with average and design flow, treatment technology, the NPDES permit and its expiry, a three-year compliance snapshot and the capital projects planned in its city.

193 plant locations in Kentucky; dot size follows average flow.

NPDES permits and renewals in Kentucky

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 Kentucky →20 permits expiring in 2026 →19 permits expiring in 2027 →33 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in Kentucky

The 25 largest publicly owned wastewater treatment plants in Kentucky by average flow, with NPDES permit, expiry, treatment technology and three-year violation count. Source: EPA ICIS-NPDES via Klarifi.
Facility	City	Avg flow (MGD)	Design (MGD)	NPDES permit	Expires	Technology	Violations (3y)
Msd, Morris Forman Plant	Louisville	56.18	120	KY0022411	Sep 2004	Clarifiers, Uncovered lagoons, Biogas balloons	221
Derek R Guthrie WQTC MSD	Louisville	39.73	60	KY0078956	Apr 2031	Clarifiers	16
Rwra Max Rhoads WWTP	Owensboro	6.56	15	KY0020095	Dec 2021	Clarifiers, Carrousels / oxidation ditches	1
Valley Creek Wastewater Treatment Plant	Elizabethtown	5.3	13	KY0022039	Oct 2023	Clarifiers, Carrousels / oxidation ditches	1
Richmond Otter Creek STP	Richmond	4.57	8	KY0107107	Dec 2030	Clarifiers, Carrousels / oxidation ditches	4
Strodes Creek STP	Winchester	3.18	7.2	KY0037991	Sep 2026	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	2
London STP	London	3.02	5	KY0021270	May 2030	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	20
Henderson South STP #2	Robards	2.89	8	KY0100293	Jun 2012	Clarifiers, Uncovered lagoons, Biogas silos, Biogas balloons	0
Bee Creek WWTP	Murray	2.83	8.75	KY0072761	Sep 2028	Clarifiers, Carrousels / oxidation ditches	2
Hopkinsville Hammond Wood STP	Hopkinsville	2.67	6	KY0066532	Sep 2030	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	2
Waste Water Treatment	Corbin	2.5	4.5	KY0020133	Jan 2031	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	26
Berea Municipal Utilities WWTP	Berea	2.23	4.3	KY0079898	Nov 2030	Clarifiers, Carrousels / oxidation ditches	0
Middlesboro STP	Middlesboro	1.94	3.6	KY0072885	Oct 2030	—	0
Morehead WWTP	Morehead	1.87	5	KY0052752	Dec 2030	Clarifiers, Biogas silos	0
Radcliff STP	Radcliff	1.86	4	KY0022390	Nov 2029	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	1
Fort Knox WWTP	Fort Knox	1.64	6	KY0112721	Sep 2030	Clarifiers, Carrousels / oxidation ditches	2
Greenup County Environmental Commission Wastewater Treatment Plant	Russell	1.63	3.5	KY0048348	May 2030	Clarifiers, Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches	0
Mount Sterling Hinkston Creek STP	Mt Sterling	1.62	3	KY0104400	Dec 2027	Clarifiers, Carrousels / oxidation ditches	14
Hazard, City Of	Hazard	1.48	3	KY0020079	Aug 2030	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	8
Harrodsburg WWTP Expansion	Harrodsburg	1.39	3.5	KY0027421	Dec 2027	Clarifiers, Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches	75
Paris STP	Paris	1.37	2.7	KY0090654	Mar 2030	Clarifiers, Carrousels / oxidation ditches	6
Carrollton Regional WWTP	Carrollton	1.18	1.7	KY0104931	Mar 2027	Clarifiers, Aerated lagoons	0
Leitchfield STP	Leitchfield	1.04	2	KY0022934	Nov 2030	Clarifiers, Aerated lagoons	1
Greenup Joint Sewer Agency	Wurtland	0.95	1.1	KY0033553	Jul 2030	—	2
Harlan STP	Harlan	0.94	1.2	KY0026093	Jun 2031	—	7

The 50 largest plants in Kentucky →Kentucky capital improvement plans →

Kentucky plants by treatment technology

Activated sludge and clarifiers (103)Lagoon systems (74)Oxidation ditches (64)Chlorine disinfection (18)UV disinfection (15)Anaerobic digesters and biogas (5)

All 193 plants in Kentucky

Facility	City	Flow (MGD)
Msd, Morris Forman Plant	Louisville	56.18
Derek R Guthrie WQTC MSD	Louisville	39.73
Rwra Max Rhoads WWTP	Owensboro	6.56
Valley Creek Wastewater Treatment Plant	Elizabethtown	5.3
Richmond Otter Creek STP	Richmond	4.57
Strodes Creek STP	Winchester	3.18
London STP	London	3.02
Henderson South STP #2	Robards	2.89
Bee Creek WWTP	Murray	2.83
Hopkinsville Hammond Wood STP	Hopkinsville	2.67
Waste Water Treatment	Corbin	2.5
Berea Municipal Utilities WWTP	Berea	2.23
Middlesboro STP	Middlesboro	1.94
Morehead WWTP	Morehead	1.87
Radcliff STP	Radcliff	1.86
Fort Knox WWTP	Fort Knox	1.64
Greenup County Environmental Commission Wastewater Treatment Plant	Russell	1.63
Mount Sterling Hinkston Creek STP	Mt Sterling	1.62
Hazard, City Of	Hazard	1.48
Harrodsburg WWTP Expansion	Harrodsburg	1.39
Paris STP	Paris	1.37
Carrollton Regional WWTP	Carrollton	1.18
Leitchfield STP	Leitchfield	1.04
Greenup Joint Sewer Agency	Wurtland	0.95
Harlan STP	Harlan	0.94
Cynthiana STP (new)	Cynthiana	0.93
Mount Washington STP	Mt Washington	0.91
Greenville STP	Greenville	0.86
La Grange STP	La Grange	0.85
Tompkinsville STP	Tompkinsville	0.82
Winchester Municipal Utilities	Winchester	0.74
Paintsville Municipal Water Works-Paintsville WTP	Paintsville	0.72
Caveland Environmental Auth	Horse Cave	0.72
Ky State Reformatory	La Grange	0.71
Walton STP	Walton	0.68
Williamstown/dry Ridge WRF	Williamstown	0.67
Springfield STP	Springfield	0.65
Prestonsburg STP	Prestonsburg	0.63
Oak Grove, City Of	Oak Grove	0.59
Irvine STP	Irvine	0.58
Morganfield WWTP	Morganfield	0.54
Benton STP	Benton	0.53
Liberty STP	Liberty	0.53
Red River WWTP	Stanton	0.53
Mccreary County STP	Stearns	0.53
Columbia/adair County STP	Columbia	0.51
Eddyville STP	Eddyville	0.49
Vine Grove STP	Vine Grove	0.47
Jackson STP	Jackson	0.45
Pineville STP	Pineville	0.44
West Liberty STP	West Liberty	0.42
Wilmore STP	Wilmore	0.41
Louisa STP	Louisa	0.39
Hodgenville STP	Hodgenville	0.39
Jenkins WWTP	Jenkins	0.39
Mount Vernon STP	Mount Vernon	0.37
Eminence STP	Eminence	0.36
Flemingsburg STP	Flemingsburg	0.35
Paducah/mccracken County Jsa - Woodlawn	Paducah	0.35
Clay STP	Clay	0.35
Monticello STP	Monticello	0.35
Cumberland Sewage Treatment Plant	Cumberland	0.34
Mckee STP	Mckee	0.34
New Marion WWTP	Marion	0.32
Hardinsburg STP	Hardinsburg	0.32
Paducah/mccracken County Jsa - Reidland	Reidland	0.32
Hickman East STP	Hickman	0.29
Whitesburg STP (new)	Whitesburg	0.29
Carlisle STP	Carlisle	0.28
Cloverport STP	Cloverport	0.28
Simpsonville STP	Simpsonville	0.27
Campton STP	Campton	0.27
Burkesville WWTP	Burkesville	0.26
Guthrie STP	Guthrie	0.26
Greensburg STP	Greensburg	0.26
Falmouth STP (new)	Falmouth	0.25
Beattyville STP	Beattyville	0.25
Taylorsville STP	Taylorsville	0.22
Brandenburg WWTP	Brandenburg	0.22
Albany STP	Albany	0.22
Sandy Hook STP	Sandy Hook	0.22
Dawson Springs STP	Dawson Springs	0.21
Calhoun WWTP	Calhoun	0.2
Cmuc STP	Morgantown	0.2
Marshall Co Sd #2	Draffenville	0.2
Northern Madison County Sanitation District	Richmond	0.2
Midway STP	Midway	0.19
Grant County STP	Dry Ridge	0.19
Warsaw STP	Warsaw	0.19
Edmonton STP	Edmonton	0.18
Cadiz STP	Cadiz	0.17
South Hopkins Regional WWTP	Nortonville	0.16
Bedford STP	Bedford	0.16
Kentucky American Water Co - Millersburg	Millersburg	0.16
Lewisport STP	Lewisport	0.15
Uniontown STP	Uniontown	0.15
Auburn WWTP	Auburn	0.15
Sturgis STP	Sturgis	0.14
Bath County Industrial Park	Owingsville	0.14
South Shore STP	South Shore	0.14
Booneville STP	Booneville	0.13
Brodhead WWTP	Brodhead	0.13
Elkton STP	Elkton	0.13
Vanceburg STP	Vanceburg	0.13
Munfordville STP	Munfordville	0.13
Lake City WWTP	Grand Rivers	0.13
Hawesville STP	Hawesville	0.12
Catlettsburg WWTP	Catlettsburg	0.12
Wheelwright STP	Wheelwright	0.11
Clarkson STP	Clarkson	0.11
Benham STP	Benham	0.1
Milton STP	Milton	0.1
Lebanon Junction STP	Lebanon Junction	0.1
Inez STP	Inez	0.09
Worthington WWTP	Worthington	0.09
Hyden STP	Hyden	0.09
New Castle STP	New Castle	0.09
Ledbetter Sanitation District #1	Ledbetter	0.09
West Point STP	West Point	0.09
Symsonia Water & Sewer	Symsonia	0.09
Big Sandy Wastewater Treatment Plant	Betsy Layne	0.08
Kuttawa STP	Kuttawa	0.08
Montgomery County Sanitation District #2	Jeffersonville	0.08
Clinton STP	Clinton	0.07
Fancy Farm Water District STP	Fancy Farm	0.07
Frenchburg STP	Frenchburg	0.07
Irvington STP	Irvington	0.07
Lewis County Sd #1	Tollesboro	0.07
Martin STP	Martin	0.07
Elkhorn City STP	Elkhorn City	0.07
Pike County Phelps Freeburn STP	Freeburn	0.07
Bcsd Willabrook Sanitation	Shepherdsville	0.06
Brownsville STP	Brownsville	0.06
Evarts STP	Evarts	0.06
Salyersville STP	Salyersville	0.06
Kevil STP	Kevil	0.05
Crofton WWTP	Crofton	0.05
Barlow STP	Barlow	0.05
Georgetown STP #3	Stamping Ground	0.05
Salem STP	Salem	0.05
Knott Co Water & Sewer District-Knott Co WTP	Pippa Passes	0.05
Whitesville STP	Whitesville	0.05
Bcsd Hillview STP	Brooks	0.05
Science Hill STP	Science Hill	0.04
Fordsville STP	Fordsville	0.04
Adairville STP	Adairville	0.04
Hindman STP	Hindman	0.04
Butler STP	Butler	0.04
Caneyville STP	Caneyville	0.04
Marshall County Sanitation District #1	Aurora	0.04
Hardin Sewerage Treatment	Hardin	0.04
Drakesboro STP	Drakesboro	0.04
Coolbrook WWTP	Frankfort	0.04
Green County Sanitation District #1	Summersville	0.04
Livermore STP	Livermore	0.03
Wingo STP	Wingo	0.03
Executive Park Subdivision Nmcsd	Berea	0.03
Island STP	Island	0.03
Menifee County Sanitation District #1	Means	0.03
Tug Valley Regional Waste Water Treatment Plant	Warfield	0.03
Vicco STP	Vicco	0.03
Slade-Nada WWTP	Stanton	0.03
Garrison Regional WWTP	Garrison	0.02
Wayland STP	Wayland	0.02
North Middletown WWTP	North Middletown	0.02
Corinth STP	Corinth	0.02
Gamaliel STP	Gamaliel	0.02
Sharpsburg STP	Sharpsburg	0.02
Ball Creek WWTP	Vest	0.02
Mount Olivet STP	Mount Olivet	0.02
Trenton STP	Trenton	0.02
Sacramento STP	Sacramento	0.01
Bradfordsville STP	Bradfordsville	0.009
Perry County Sd 1 Regional STP	Chavies	0.009
Willow Pointe Sanitation Co	Glencoe	0.009
Chimney Rock WWTP	Harrodsburg	0.0054
Eastern STP	Eastern	0.004
Big Valley Mhp	Shepherdsville	0.0031
Keene Village Water & Sewer	Raccoon	0.002
Evarts STP #2	Verda	0.0013
Bardstown Wastewater Treatment Plant - Town Creek	Bardstown	—
Bloomfield WWTP	Bloomfield	—
Carlisle Co Regional STP	Bardwell	—
Crab Orchard STP	Crab Orchard	—
Hardin Co Water District No 2 Wastewater Colection	Elizabethtown	—
La Center WWTP	La Center	—
Loyall STP	Loyall	—
Meadowbrook Subdivision	Frankfort	—
New Haven STP	New Haven	—
Owingsville STP	Owingsville	—
Powderly, City Of	Powderly	—
Smithland STP	Smithland	—
South 641 Water District	Hazel	—

Wastewater treatment in Kentucky: 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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