How many wastewater treatment plants are there in West Virginia?

Klarifi tracks 232 publicly owned wastewater treatment plants in West Virginia with a combined average flow of 90 million gallons per day, serving about 889,314 residents. 18 of them treat more than 1 MGD and 0 more than 10 MGD.

What is the largest wastewater treatment plant in West Virginia?

Huntington WWTP in Huntington is the largest plant in West Virginia by average flow, treating about 9.5 MGD.

What treatment technologies are common in West Virginia?

48 of West Virginia's plants use lagoon systems and 9 have biogas or anaerobic digestion infrastructure, based on Klarifi's aerial imagery review.

How many NPDES permits in West Virginia are up for renewal?

0 permits held by West Virginia plants expire in 2026 and 2 in 2027. Renewals typically bring new limits and trigger upgrade projects.

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Wastewater Treatment Plants in West Virginia

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

232 facilities · 90 MGD combined flow

Klarifi tracks 232 publicly owned wastewater treatment plants in West Virginia with a combined average flow of 90 MGD, serving about 889,314 residents. 18 plants treat more than 1 MGD and 0 more than 10 MGD; 48 use lagoon systems and 9 have digesters or biogas infrastructure. The largest is Huntington WWTP in Huntington at 9.5 MGD. 0 NPDES permits expire this year and 2 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. Showing facilities 1–200 of 232 by average flow — browse the rest with the page links below.

232 plant locations in West Virginia; dot size follows average flow.

NPDES permits and renewals in West Virginia

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 West Virginia →13 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in West Virginia

The 25 largest publicly owned wastewater treatment plants in West Virginia 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)
Huntington WWTP	Huntington	9.5	—	WVL023159	Dec 2030	Uncovered lagoons	72
The Sanitary Board Of The City Of Charleston, West Virginia	Charleston	6.28	—	WVL023205	Dec 2030	Clarifiers, Biogas silos	6
City Of Wheeling - Water Pollution Control Division	Wheeling	4.8	10	WV0023230	Jun 2010	Clarifiers, Biogas silos	130
Fairmont Wastewater Treatment Plant	Fairmont	4.4	—	WVL023353	Dec 2030	Clarifiers, Biogas silos	52
Parkersburg Utility Board	Parkersburg	4.25	—	WVL023213	Dec 2030	Clarifiers, Biogas silos	3
South Charleston Wwtw	South Charleston	4	13	WV0023116	Jan 2012	Clarifiers	27
Clarksburg Sanitary Bd	Clarksburg	3.99	8	WV0023302	Apr 2015	—	592
Princeton, City Of	Princeton	2.9	—	WVL023094	Dec 2030	Clarifiers, Biogas silos	21
Moorefield/hardy County Regional Wastewater	Moorefield	2.79	—	WV0106038	Jun 2021	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	18
Weirton, City Of	Weirton	2.41	—	WVL023108	Dec 2030	Clarifiers, Uncovered lagoons	84
Hurricane City Of	Hurricane	2.2	—	WVR030010	Sep 2030	Clarifiers	75
Richwood City Of	Richwood	1.4	0.5	WV0022004	Mar 2013	—	197
Oh/ Inw/ Bh/ NE 001-004	Martinsburg	1.39	5.9	WV0082759	Jun 2008	Uncovered lagoons	471
Bridgeport Wastewater Treatment Plant	Bridgeport	1.34	3	WV0025461	Jun 2010	Clarifiers, Carrousels / oxidation ditches	93
Martinsburg City Of WWTP	Martinsburg	1.28	3	WV0023167	Dec 2012	Clarifiers, Biogas silos	59
Rocky Fork Wastewater Plant	Cross Lanes	1.13	—	WVL037486	Dec 2030	—	15
City Of Ronceverte	Ronceverte	1.1	1.2	WV0024236	Mar 2014	Clarifiers	199
City Of St. Albans	Saint Albans	1.03	—	WVL023175	Dec 2030	Clarifiers	1
North Beckley Psd	Beckley	0.99	2.5	WV0027740	Mar 2009	—	112
Nitro WWTP	Nitro	0.99	—	WVL023299	Dec 2030	—	338
Sanitary Board	Barboursville	0.89	1	WV0024481	Dec 2012	Clarifiers	82
Grafton City Of	Grafton	0.83	—	WVL021822	Dec 2030	Clarifiers	90
Pea Ridge Public Svc	Barboursville	0.8	1.21	WV0027413	Jun 2013	Clarifiers	79
Shady Spring Psd	Beaver	0.76	1.2	WV0080403	Jun 2009	Clarifiers	51
Salt Rock Sewer Psd	Ona	0.75	2.5	WV0084450	Apr 2013	Carrousels / oxidation ditches	31

The 50 largest plants in West Virginia →

West Virginia plants by treatment technology

Activated sludge and clarifiers (81)Lagoon systems (51)Oxidation ditches (37)Chlorine disinfection (36)UV disinfection (18)Anaerobic digesters and biogas (10)

All 232 plants in West Virginia

Facility	City	Flow (MGD)
Huntington WWTP	Huntington	9.5
The Sanitary Board Of The City Of Charleston, West Virginia	Charleston	6.28
City Of Wheeling - Water Pollution Control Division	Wheeling	4.8
Fairmont Wastewater Treatment Plant	Fairmont	4.4
Parkersburg Utility Board	Parkersburg	4.25
South Charleston Wwtw	South Charleston	4
Clarksburg Sanitary Bd	Clarksburg	3.99
Princeton, City Of	Princeton	2.9
Moorefield/hardy County Regional Wastewater	Moorefield	2.79
Weirton, City Of	Weirton	2.41
Hurricane City Of	Hurricane	2.2
Richwood City Of	Richwood	1.4
Oh/ Inw/ Bh/ NE 001-004	Martinsburg	1.39
Bridgeport Wastewater Treatment Plant	Bridgeport	1.34
Martinsburg City Of WWTP	Martinsburg	1.28
Rocky Fork Wastewater Plant	Cross Lanes	1.13
City Of Ronceverte	Ronceverte	1.1
City Of St. Albans	Saint Albans	1.03
North Beckley Psd	Beckley	0.99
Nitro WWTP	Nitro	0.99
Sanitary Board	Barboursville	0.89
Grafton City Of	Grafton	0.83
Pea Ridge Public Svc	Barboursville	0.8
Shady Spring Psd	Beaver	0.76
Salt Rock Sewer Psd	Ona	0.75
Ravencliff-Mcgraws-Saulsville Psd	Mcgraws	0.72
Malden Public Service District	Charleston	0.68
Weston City Of	Weston	0.68
Welch City Of	Welch	0.67
Buckhannon Sewer Plant	Buckhannon	0.63
Philippi City Of	Philippi	0.63
City Of New Martinsville	New Martinsville	0.63
Green Valley-Glenwood Psd	Princeton	0.62
Glenville Utility Water Treatment Plant	Glenville	0.61
Keyser City Of	Keyser	0.61
Elk-Pinch Public Servic Distri	Elkview	0.57
Oak Hill, City Of	Oak Hill	0.52
Ripley WWTP	Ripley	0.52
City Of Glenville	Glenville	0.51
Kanawha Falls Psd	Deepwater	0.51
Crab Orchard/macarthur Psd	Macarthur	0.49
Kanawha Public Service District	Chelyan	0.49
Summersville, City Of	Summersville	0.47
Frankfort Public Service District	Patterson Creek	0.44
Shinnston City Of WWTP	Shinnston	0.38
City Of Petersburg	Petersburg	0.38
City Of Spencer	Spencer	0.37
Warm Springs Psd	Berkeley Springs	0.35
Mineral Wells Psd	Mineral Wells	0.35
Bradley Psd	Bradley	0.34
Follansbee City Of	Follansbee	0.33
Union-Williams Psd	Waverly	0.32
Matewan Town Of	Matewan	0.32
Cowen Psd	Cowen	0.3
Shepherdstown WWTP	Shepherdstown	0.29
Buffalo Creek Psd	Amherstdale	0.29
Point Pleasant Wastewater Treatment Plant	Point Pleasant	0.28
Montgomery, City Of	Montgomery	0.27
Salem City Of	Salem	0.27
Boone County Psd	Danville	0.26
Corporation Of Harpers Ferry	Harpers Ferry	0.25
White Oak Psd	Scarbro	0.25
Eleanor Town Of	Eleanor	0.25
Flatwoods-Canoe Run Public Service District	Gassaway	0.25
Chester City Of	Chester	0.24
Logan County Psd	Peach Creek	0.23
Town Of Marmet	Marmet	0.23
Wellsburg, City Of	Wellsburg	0.22
Paden City WWTP	Paden City	0.22
Sissonville Psd	Sissonville	0.22
Belington City Of	Belington	0.22
Greater Harrison Co. Psd	West Milford	0.21
Red Sulphur Psd	Peterstown	0.2
Town Of Masontown	Reedsville	0.2
St Mary'S City Of	Saint Marys	0.2
Town Of West Union	West Union	0.19
Town Of Ansted	Ansted	0.19
Romney WWTP	Romney	0.19
Town Of Chapmanville	Chapmanville	0.19
Craigsville Psd	Craigsville	0.19
Clarksburg Water Board	Clarksburg	0.18
City Of Parsons	Parsons	0.18
City Of Winfield	Winfield	0.18
Beverly Town Of	Beverly	0.18
Bluefield, Sanitary Board Of	Bluefield	0.18
Claywood Park Psd-S. B. R. Pla	Parkersburg	0.17
City Of Pennsboro	Pennsboro	0.17
Town Of Sophia	Sophia	0.17
Marlinton, Town Of	Marlinton	0.16
Mannington City Of	Mannington	0.15
Harrisville Town Of	Harrisville	0.14
Putnam Psd - Hometown WWTP	Hometown	0.14
Town Of Athens	Athens	0.14
New Haven Town Of	New Haven	0.14
City Of Williamstown	Williamstown	0.14
Cameron, City Of	Cameron	0.14
Wayne, Town Of	Wayne	0.13
Mason County Psd	Point Pleasant	0.13
City Of Mullens Sanitery Board	Mullens	0.13
Town Of Newell	Newell	0.12
Hamlin Psd	Hamlin	0.12
Junior Town Of	Junior	0.12
Buffalo Town Of	Buffalo	0.11
Center Psd	Pineville	0.1
Hinton Sanitary Board	Hinton	0.1
Pratt Town Of	Pratt	0.1
Hancock County Bus Garage	New Cumberland	0.09
Mason Town Of	Mason	0.09
Town Of Terra Alta	Terra Alta	0.09
Harpers Ferry-Bolivar Psd	Harpers Ferry	0.09
Worthington Town Of	Worthington	0.09
Hamrick Psd	Hendricks	0.08
Franklin, Municipality Of-Treatment Plant	Franklin	0.08
Town Of Fort Gay Wastewater Pond	Fort Gay	0.08
Town Of Elizabeth	Elizabeth	0.08
Farmington City Of	Farmington	0.08
Town Of Kermit	Kermit	0.08
Belmont Town Of	Belmont	0.08
Middlebourne Town Of	Middlebourne	0.08
New Cumberland City Of	New Cumberland	0.08
Hancock County Psd	New Cumberland	0.07
Clay Sanitation Plant	Clay	0.07
Paw Paw Town Of	Paw Paw	0.07
Town Of Lumberport POTW	Lumberport	0.07
Flemington Town Of	Flemington	0.07
Glasgow Town Of	Glasgow	0.07
City Of Gary/warehouse Project	Gary	0.06
Central Boaz Public Service Di	Vienna	0.06
Evans WWTP	Ripley, Wv	0.06
Ravencliff-Mcgraws-Saulsville Psd	Glen Rogers	0.06
Central Hampshire Psd-Booster Chlorination Treatment Plant	Romney	0.06
Enlarged Hepzibah Psd	Hepzibah	0.06
Bethany Sanitation Board	Bethany	0.06
Poca Sewer Plant	Poca	0.06
Union Town Of	Union	0.05
Webster Springs Psd	Webster Springs	0.05
City Of Sistersville	Sistersville	0.05
Putnam P S D-Peach Ridge Tank Booster Chlorination	Scott Depot	0.05
Mountwood Park WWTP	Waverly	0.05
Bluewell Psd	Montcalm	0.05
Cottageville Psd	Millwood	0.04
Page-Kincaid Psd	Kincaid	0.04
Shady Spring Psd	Ghent	0.04
Gilbert, Town Of	Gilbert	0.04
West Hamlin Town Of	West Hamlin	0.04
War WWTP	War	0.04
Albright Sewer Dept.	Albright	0.03
Town Of Durbin	Durbin	0.03
Rowlesburg,town Of	Rowlesburg	0.03
Woods Ii Subdivision	Martinsburg	0.02
Town Of Meadow Bridge	Meadow Bridge	0.02
Marshall County Sewerage District	Glen Dale	0.02
Capon Bridge WWTP	Capon Bridge	0.02
Burnsville Public Utility Board	Burnsville	0.02
Canaan Valley Psd	Davis	0.02
Harvest Hills WWTP	Romney	0.02
Pax Town Of	Pax	0.02
Town Of Harman	Harman	0.02
Tyler County Psd-Treatment Plant	Friendly	0.02
Beech Bottom/franklin Manor	Beech Bottom	0.02
Matoaka WWTP	Matoaka	0.02
Slab Fork Treatment Facilities	Slab Fork	0.02
Bramwell Psd	Bramwell	0.02
Alderson Water Plant	Alderson	0.02
Thomas City Of	Thomas	0.02
Blacksville Sewage Department	Blacksville	0.01
Town Of Tunnelton	Tunnelton	0.01
Rolling Acres Subdivision	Pt. Pleasant	0.01
Northbrook WWTP	Falling Waters	0.01
Rupert Water Department	Rupert	0.01
Wardensville Town Of	Wardensville	0.01
Hundred Operating Center	Hundred	0.01
Bradley Psd - Walhonde Subdivision #2	Bradley	0.01
Rutherford Subdivision	Wayne	0.01
Stevenwood Subdivision	Surveyor	0.01
Town Of Wayne-Briarwood	Wayne	0.01
Wayne Middle School	Wayne	0.01
Newburg WWTP	Newburg	0.009
Pleasant View Psd	Branchland	0.009
Meadow Creek Psd	Meadow Creek	0.0085
Town Of Reedy	Reedy	0.008
Sandstone Sewage Facility	Sandstone	0.0075
Pine Grove Town Of	Pine Grove	0.007
Wayne High School	Wayne	0.007
Community Of Helen	Helen	0.006
Prichard Public Service District	Prichard	0.006
Town Of Reedsville	Reedsville	0.0055
Bennett Manor Addition	Quiet Dell	0.005
Home School Village	Bradley	0.005
Maple Heights	Wayne	0.005
Auburn Village Subdivision	Bridgeport	0.0048
Upper Tract WTP	Upper Tract	0.0045
Greenbrier Psd No 1	Lewisburg	0.0044
Forever Green Marketplace	Falling Waters	0.0044
Big Bend Psd	Talcott	0.0043
Berkeley County Public Service District	Bunker Hill	0.004
Tomahawk School	Hedgesville	0.004
Valley Point Sanitary Sewer Collection And Treatment System	Bruceton Mills	0.004
New Creek Public Service District	New Creek	0.0039
Highpointe Subdivision	Bunker Hill	0.0039

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Wastewater treatment in West Virginia: 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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