How many wastewater treatment plants are there in New York?

Klarifi tracks 461 publicly owned wastewater treatment plants in New York with a combined average flow of 1,689 million gallons per day, serving about 14,028,054 residents. 87 of them treat more than 1 MGD and 25 more than 10 MGD.

What is the largest wastewater treatment plant in New York?

Newtown Creek Water Pollution Control Plant in Brooklyn is the largest plant in New York by average flow, treating about 188 MGD.

What treatment technologies are common in New York?

61 of New York's plants use lagoon systems and 137 have biogas or anaerobic digestion infrastructure, based on Klarifi's aerial imagery review.

How many NPDES permits in New York are up for renewal?

41 permits held by New York plants expire in 2026 and 52 in 2027. Renewals typically bring new limits and trigger upgrade projects.

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Wastewater Treatment Plants in New York

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

461 facilities · 1,689 MGD combined flow

Klarifi tracks 461 publicly owned wastewater treatment plants in New York with a combined average flow of 1,689 MGD, serving about 14,028,054 residents. 87 plants treat more than 1 MGD and 25 more than 10 MGD; 61 use lagoon systems and 137 have digesters or biogas infrastructure. The largest is Newtown Creek Water Pollution Control Plant in Brooklyn at 188 MGD. 41 NPDES permits expire this year and 52 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 461 by average flow — browse the rest with the page links below.

461 plant locations in New York; dot size follows average flow.

NPDES permits and renewals in New York

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 New York →41 permits expiring in 2026 →52 permits expiring in 2027 →47 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in New York

The 25 largest publicly owned wastewater treatment plants in New York 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)
Newtown Creek Water Pollution Control Plant	Brooklyn	188	310	NY0026204	Jun 2027	Clarifiers, Biogas silos, Biogas balloons	5
NYC-DEP Wards Island WPCP	Manhattan	174	275	NY0026131	Jun 2027	Clarifiers, Biogas silos	25
NYC-DEP North River WPCP	New York	110	—	NYR00E625	Dec 2030	—	2
Hunts Point Water Pollution Control Plant	Bronx	109	200	NY0026191	Jun 2027	Clarifiers, Biogas silos	11
Nycdep - Bowery Bay WRRF	Astoria	94	150	NY0026158	Jun 2027	Clarifiers, Biogas silos	10
Owls Head Water Pollution Control Plant	Brooklyn	88	120	NY0026166	Jun 2027	Biogas silos	9
Coney Island Water Pollution Control Plant	Brooklyn	83	110	NY0026182	Jun 2027	—	8
Jamaica Water Pollution Control Plant	Jamaica	70	100	NY0026115	Jun 2027	Clarifiers, Biogas silos	10
Cedar Creek WPCP	Wantagh	62.2	72	NY0026859	Jan 2026	Clarifiers, Biogas silos, Biogas balloons	12
Tallman Island Wastewater Treatment Plant	Queens	57	80	NY0026239	Jun 2027	Clarifiers, Biogas balloons	2
Westchester Co Of - Yonkers Joint Waste Water Treatment Plant	Yonkers	55	120	NY0026689	May 2019	Biogas silos	29
Bay Park Sewage Treatment Plant	East Rockaway	48.5	70	NY0026450	Jan 2026	Clarifiers, Biogas balloons	4
Albany County Sewer District - South Plant	Albany	45.11	29	NY0026867	Feb 2030	Clarifiers, Uncovered lagoons, Biogas silos	49
NYC DEP 26 Ward WPCP	Brooklyn	43	85	NY0026212	Jun 2027	Biogas silos	13
Nycdep - Red Hook WPCP	Brooklyn	28	60	NY0027073	Jun 2027	Biogas silos	2
Bergen Point STP & Bergen Ave Dock	W Babylon	26.7	30.5	NY0104809	Dec 2019	Clarifiers, Uncovered lagoons, Biogas silos	81
Nycdep - Oakwood Beach WPCP	Staten Island	25.4	39.9	NY0026174	Jun 2027	Biogas silos, Biogas balloons	6
Port Richmond Water Pollution Control Plant	Staten Island	21	60	NY0026107	Jun 2027	Clarifiers, Biogas silos	4
New York (c) - Rockaway WPCP	Rockaway Park	20	45	NY0026221	Jun 2027	Biogas silos	3
City Of Niagara Falls Wastewater Treatment Plant	Niagara Falls	19.6	48	NY0026336	Oct 2018	—	2
Rensselaer County Sd#1 WWTP	Troy	15.63	24	NY0087971	May 2030	Clarifiers, Biogas silos, Biogas balloons	9
Tonawanda (t) Sd#2 WWTP	Tonawanda	11.7	30	NY0026395	Jun 2019	Clarifiers, Biogas balloons	9
Schenectady (c) STP	Schenectady	11.1	18.5	NY0020516	Dec 2025	Clarifiers, Biogas silos, Biogas balloons	3
Mamaroneck (v) Sanitary Sd	Mamaroneck	11	20.6	NY0026701	Mar 2013	—	1
NW Quadrant Pure Waters Dist WWTP	Hilton	10.3	22	NY0028231	Jan 2019	Clarifiers, Biogas silos, Biogas balloons	2

The 50 largest plants in New York →New York capital improvement plans →

New York plants by treatment technology

Activated sludge and clarifiers (179)Anaerobic digesters and biogas (137)Lagoon systems (61)Oxidation ditches (28)

All 461 plants in New York

Facility	City	Flow (MGD)
Newtown Creek Water Pollution Control Plant	Brooklyn	188
NYC-DEP Wards Island WPCP	Manhattan	174
NYC-DEP North River WPCP	New York	110
Hunts Point Water Pollution Control Plant	Bronx	109
Nycdep - Bowery Bay WRRF	Astoria	94
Owls Head Water Pollution Control Plant	Brooklyn	88
Coney Island Water Pollution Control Plant	Brooklyn	83
Jamaica Water Pollution Control Plant	Jamaica	70
Cedar Creek WPCP	Wantagh	62.2
Tallman Island Wastewater Treatment Plant	Queens	57
Westchester Co Of - Yonkers Joint Waste Water Treatment Plant	Yonkers	55
Bay Park Sewage Treatment Plant	East Rockaway	48.5
Albany County Sewer District - South Plant	Albany	45.11
NYC DEP 26 Ward WPCP	Brooklyn	43
Nycdep - Red Hook WPCP	Brooklyn	28
Bergen Point STP & Bergen Ave Dock	W Babylon	26.7
Nycdep - Oakwood Beach WPCP	Staten Island	25.4
Port Richmond Water Pollution Control Plant	Staten Island	21
New York (c) - Rockaway WPCP	Rockaway Park	20
City Of Niagara Falls Wastewater Treatment Plant	Niagara Falls	19.6
Rensselaer County Sd#1 WWTP	Troy	15.63
Tonawanda (t) Sd#2 WWTP	Tonawanda	11.7
Schenectady (c) STP	Schenectady	11.1
Mamaroneck (v) Sanitary Sd	Mamaroneck	11
NW Quadrant Pure Waters Dist WWTP	Hilton	10.3
Erie County Southtowns Sewage Treatment Plant	Buffalo	9.5
New Rochelle STP	New Rochelle	9
Lockport (c) WWTP	Lockport	6.55
City Of Poughkeepsie Water Pollution Control Plant	Poughkeepsie	6.18
Newburgh (c) WWTP	Newburgh	5.4
Amsterdam (c) WWTP	Amsterdam	5.35
Watertown Pollution Control Plant	Watertown	5.21
Plattsburgh (c) WPCP	Plattsburgh	5.2
Orangetown Town Of Sewer Dept	Orangeburg	5.18
Peekskill Wastewater Treatment Plant	Peekskill	5.17
Village Of Endicott Water Polution Control Plant	Endicott	4.81
Rome Municipal STP	Rome	4.7
Ocsd#1 - Harriman Sewage Treatment Plant	Harriman	4.53
Long Beach (c) WPCP	Long Beach	4.53
Gloversville-Johnstown Joint WWTP	Johnstown	4.4
Oak Orchard WWTP	Clay	4.21
Middletown City Of Sewage Treatment Plt	Middletown	3.94
Jamestown WWTP	Jamestown	3.84
Auburn - C STP	Auburn	3.84
North Tonawanda Wastwater Treatment Facility	North Tonawanda	3.77
Little Falls Waste Water Treatment Plant	Little Falls	3.76
Haverstraw Joint Regional STP	West Haverstraw	3.6
Le Roy R Summerson WWTF	Cortland	3.4
Kingston (c) WWTP	Kingston	3.37
Ossining Sanitary Sd WWTP	Ossining	3.32
Blind Brook Sd WWTP	Rye	3.3
New Windsor STP	Newburgh	3
Batavia (c) STP	Batavia	2.97
Glens Falls STP	Glens Falls	2.86
Big Sister Creek WRRF	Angola	2.74
Cedar Hill WPCP	Selkirk	2.71
Wetzel Road WWTP	Clay	2.6
City Of Beacon Wastewater Treatment Facility	Beacon	2.57
Baldwinsville Seneca Knolls	Baldwinsville	2.5
Hornell City Water Pollution Control Plant	Hornell	2.5
Village Of Great Neck STP	Great Neck	2.5
Olean (c) WWTP	Olean	2.3
Marsh Creek WWTP	Geneva	2.19
Oneida (c) STP	Oneida	2.19
Oswego (c) West Side WWTF	Oswego	2.1
Suffolk Co Sd#21 Suny	Stony Brook	2.09
Canandaigua - C STP	Canandaigua	1.69
City Of Ogdensburg Wastewater Treatment Plant	Ogdensburg	1.6
Grand Island Wastewater Treatment Plant	Grand Island	1.6
Huntington Sewer District STP	Huntington	1.58
Farmington T STP	Victor	1.52
South & Ctr Chautauqua L WWTP	Celoron	1.5
Oneonta WWTP	Oneonta	1.49
Waterloo (v) STP	Waterloo	1.43
Newark - V Waste Hauling	Newark	1.33
Niskayuna (t) Sd#6 WWTP	Niskayuna	1.32
Washington Co Sd#2 WWTP	Fort Edward	1.3
Dunkirk Water Filtration Plant	Dunkirk	1.2
Tri-Municipal WWTP	Wappingers Falls	1.19
Malone (v) WWTP	Malone	1.1
South Fallsburg (t) WWTP	South Fallsburg	1.08
Ulster (t) Sd STP	Kingston	1.05
Potsdam (v) WPCP	Potsdam	1.05
Oyster Bay WRRF	Oyster Bay	1.02
Yorktown Heights Sd WWTP	Yorktown Hgts	1
Cayuga Heights (v) WWTP	Ithaca	1
Village Of Walden STP	Montgomery	1
Riverhead Sewer District WWTF	Riverhead	0.97
Belgrave WPCP	Great Neck	0.92
Coxsackie (v) STP	Coxsackie	0.92
Rotterdam (t) Sd #2 STP	Schenectady	0.86
Stony Point (t) STP	Stony Point	0.84
West Carthage WPCF	Carthage	0.82
Corning (c) WWTP	Corning	0.81
Clinton (v) WWTP	Clinton	0.8
Lake Placid (v) WPCP	Lake Placid	0.8
Medina (v) WWTP	Medina	0.8
Penn Yan (v) STP	Penn Yan	0.8
Suffern (v) STP	Suffern	0.8
Kiryas Joel (v) WWTP	Monroe	0.8
Walton - V WWTP	Walton	0.78
Village Of Albion Jmipcf	Albion	0.77
Norwich (c) STP	Norwich	0.76
Lloyd Highland Sewer District STP	Highland	0.76
Ticonderoga Sd#5 WPCP	Ticonderoga	0.74
Saranac Lake (v) WPCP	Saranac Lake	0.71
Monticello (v) STP	Monticello	0.71
Westfield (v) WPCF	Westfield	0.71
Tupper Lake (v) WPCP	Tupper Lake	0.68
Erwin (t) WWTP	Painted Post	0.68
City Of Salamanca WWTP	Salamanca	0.67
Village Of Genesco WWTP	Geneseo	0.66
Catskill (v) WWTP	Catskill	0.64
Western Wayne County Regional Wastewater Treatment Plant	Palmyra, Town Of	0.62
Canastota Village WPC	Canastota	0.62
Warwick (v) WWTP	Warwick	0.62
Dansville - V STP	Dansville	0.62
East Oneida Lake Sd Wwt Fac	Sylvan Beach	0.62
Liberty (v) WWTF	Liberty	0.61
Wellsville (v) WWTP	Wellsville	0.6
Goshen (v) WWTF	Goshen	0.6
Waterford Waste Hauler	Waterford	0.58
Village Of Whitehall Wastewater Treat	Whitehall	0.58
Carmel Sewer District #2 WWTP	Carmel	0.58
Cornwall (t) WWTP	Cornwall	0.57
New Paltz WWTP	New Paltz	0.57
Avon - V STP	Avon	0.57
Chittenango (v) STP	Chittenango	0.56
Bath WWTP	Bath	0.56
Conesus Lake County Sewer District	Lakeville	0.54
Lake George STP	Lake George	0.53
Atlantic Beach WWTP	Atlantic Beach	0.53
Dolgeville (v) WWTP	Dolgeville	0.52
Gouverneur (v) WWTF	Gouverneur	0.52
Attica Wastewater Treatment Plant	Attica	0.52
Chenango (t) Sd#10	Binghamton	0.52
Herkimer (v) WWTP	Herkimer	0.5
Ontario (t) STP	Ontario	0.5
Fulton (c) STP	Fulton	0.49
Saugerties (v) Dock Street STP	Saugerties	0.49
Owego WPCP #2	Apalachin	0.49
Greenport (t) Sd 1 STP	Hudson	0.48
Hoosick Falls WWTP	Hoosick Falls	0.47
Chateaugay (v) WWTP	Chateaugay	0.45
Town Of Walworth Sd #1 WWTP	Walworth	0.43
Hamilton (v) WPCP	Hamilton	0.42
Rouses Point (v) WWTP	Rouses Point	0.42
Fishkill (v) STP	Fishkill	0.41
Gowanda (v) STP	Gowanda	0.41
Springville (v) WWTP	Springville	0.4
Coeymans-Ravena WPCF	Coeymans	0.4
Fonda - Fultonville Joint WWTP	Fonda	0.4
Catharine Valley Water Reclamation Facility	Watkins Glen	0.39
Cooperstown (v) WWTP	Cooperstown	0.39
Sidney Vill Water Pollution Control Plant	Sidney	0.39
Washingtonville (v) WWTP	Washingtonville	0.39
Perry (v) WWTP	Perry	0.38
Patchogue (v) WWTP	Patchogue	0.38
Canton WWTP	Canton	0.38
Moravia (v) STP	Moravia	0.38
Owego (v) STP	Owego	0.37
Deposit (v) WPCP	Deposit	0.36
Newfane (t) WWTP	Olcott	0.36
Greenport Power Plant	Greenport	0.36
Cazenovia WWTP	Cazenovia	0.35
Clayton (v) STP	Clayton	0.35
Minoa (v) STP	Minoa	0.33
Vernon (v) STP	Vernon	0.33
Dannemora (v) STP	Dannemora	0.31
North Castle (t) Sd#2	Armonk	0.31
Granville (v) WWTP	Granville	0.31
Alfred Wastewater Treatment Plant	Alfred	0.3
Ellenville (v) STP	Ellenville	0.3
Waverly (v) STP	Waverly	0.29
Leroy - V WWTP	Leroy	0.28
Avon WWTP	Woodridge	0.28
Silver Creek (v) WWTP	Silver Creek	0.28
Honeoye Falls (v) WWTP	Honeoye Falls	0.27
Arcade (v) STP	Arcade	0.27
Camden (v) WWTP	Camden	0.27
Akron (v) WWTP	Akron	0.27
Altamont (v) STP	Altamont	0.26
Holley (v) STP	Holley	0.26
Warsaw (v) STP	Warsaw	0.26
Montgomery Co Sd#1 STP	Nelliston	0.25
Buchanan (v) WWTP	Buchanan	0.24
Canajoharie (v) WWTP	Canajoharie	0.24
Dundee Wastewater Treatment Plant	Dundee	0.24
Scsd#6 - Kings Park STP	Kings Park	0.24
Sherburne (v) STP	Sherburne	0.24
Lyons (t) WWTP	Lyons	0.23
Kiamesha Lake Sd STP	Monticello	0.23
Montgomery (v) STP	Montgomery	0.23
Greene (v) WWTP	Greene	0.22
(t) Moriah WWTF	Moriah	0.22
Mount Morris (v) STP	Mount Morris	0.22
Sodus (v) STP	Sodus	0.22
Victor (v) STP	Victor	0.22
Wcw & Sa Regional WWTP	Red Creek	0.22
Loch Sheldrake WWTP	Loch Sheldrake	0.21

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Wastewater treatment in New York: 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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