
Cortlandt, New York | Municipal Water Utility Company | Public Service Announcement
Cortlandt residents should be aware that Northern Westchester Joint Water Works municipal supply may contain significant levels of Metribuzin, Nitrite and cis-1,2-Dichloroethylene, along with elevated water hardness measurements. The utility provides service through purchased surface water that requires treatment to meet safety standards.
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Northern Westchester Joint Water Works Area Details

Area served:
Cortlandt, New York

Population served:
69186

Water source:
Purchased surface water

Phone:
914-737-7676

Address:
2065 East Main Street, Cortlandt Manor, NY 10567

3date
Contaminants Detected In Cortlandt, New York
Bromodichloromethane; Aluminum; Cadmium; Cyanide; Fluoride; Manganese; Nitrite; Selenium; Silver; Antimony; Thallium; Monochloroacetic acid; Dichloroa… more

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Northern Westchester Joint Water Works
Annual Municipal Water Report
Comprehensive List of Water Contaminants Tested by Northern Westchester Joint Water Works
Tested But Not Detected:
1,1,1,2-Tetrachloroethane; 1,1,1-Trichloroethane; 1,1,2,2-Tetrachloroethane; 1,1,2-Trichloroethane; 1,1-Dichloroethane; 1,1-Dichloroethylene; 1,1-Dichloropropene; 1,2,3-Trichlorobenzene; 1,2,3-Trichloropropane; 1,2,4-Trichlorobenzene; 1,2,4-Trimethylbenzene; 1,2-Dichloroethane; 1,2-Dichloropropane; 1,3,5-Trimethylbenzene; 1,3-Dichloropropane; 2,2-Dichloropropane; 2,4,5-TP (Silvex); 2,4-D; 3-Hydroxycarbofuran; Alachlor (Lasso); Aldicarb; Aldicarb sulfone; Aldicarb sulfoxide; Aldrin; Arsenic; Atrazine; Benzene; Benzo[a]pyrene; Beryllium; Bromobenzene; Bromochloromethane; Bromoform; Bromomethane; Butachlor; Carbaryl; Carbofuran; Carbon tetrachloride; Chlordane; Chloroethane; Chloromethane; cis-1,2-Dichloroethylene; cis-1,3-Dichloropropene; Dalapon; Di(2-ethylhexyl) adipate; Di(2-ethylhexyl) phthalate; Dibromoacetic acid; Dibromomethane; Dicamba; Dichlorodifluoromethane; Dichloromethane (methylene chloride); Dieldrin; Dinoseb; Endrin; Ethylbenzene; Ethylene dibromide; Heptachlor; Heptachlor epoxide; Hexachlorobenzene (HCB); Hexachlorobutadiene; Hexachlorocyclopentadiene; Isopropylbenzene; Lindane; m-Dichlorobenzene; m-Xylene; Mercury (inorganic); Methomyl; Methoxychlor; Metolachlor; Metribuzin; Monobromoacetic acid; Monochlorobenzene (chlorobenzene); MTBE; n-Butylbenzene; n-Propylbenzene; o-Chlorotoluene; o-Dichlorobenzene; o-Xylene; Oxamyl (Vydate); p-Chlorotoluene; p-Dichlorobenzene; p-Isopropyltoluene; p-Xylene; Pentachlorophenol; Picloram; Polychlorinated biphenyls (PCBs); Propachlor; Radium-226; sec-Butylbenzene; Simazine; Styrene; tert-Butylbenzene; Tetrachloroethylene (perchloroethylene); Toluene; Toxaphene; trans-1,2-Dichloroethylene; trans-1,3-Dichloropropene; Trichloroethylene; Trichlorofluoromethane; Vinyl chloride

What's in your tap water?

Learn which contaminants exceed both Legal Standards and Health Guidelines in your water.
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Northern Westchester Joint Water Works
About Us
WHERE DOES MY WATER COME FROM
The Northern Westchester Joint Water Works sources its water primarily from the Catskill Aqueduct in the Town of Cortlandt. This surface water undergoes several treatment processes before distribution, including:
- pH adjustment
- Coagulation
- Filtration
- Chlorine disinfection
- Corrosion control
The utility maintains connections to the City of Peekskill water system as a backup supply. Additionally, treated water from the Amawalk Water Treatment Plant on Route 35 in Somers can serve as an emergency water source via the Yorktown 24" transmission main.
The NYS Department of Health has evaluated water supplies statewide under the Source Water Assessment Program (SWAP). These assessments estimate potential contamination risks but do not indicate that contamination has or will occur. The Northern Westchester Joint Water Works provides continuous treatment and monitoring to ensure safety standards are met.
POTENTIAL CONTAMINANTS IN SOURCE WATER
- Microbial contaminants: Viruses and bacteria from sewage treatment plants, septic systems, agriculture, and wildlife
- Inorganic contaminants: Naturally occurring salts, nutrients, and metals, or those resulting from urban runoff, wastewater discharge, or farming
- Pesticides and herbicides: From agricultural operations, urban runoff, and residential uses
- Organic chemicals: Synthetic and volatile compounds from industrial processes, petroleum production, gas stations, stormwater runoff, and septic systems
Our water supply comes from the New York City water system, drawing from either the Catskill/Delaware watersheds east of the Hudson River or the Croton watershed in Putnam and Westchester counties. The NYC Department of Environmental Protection implements comprehensive programs to protect source water quality through watershed regulations enforcement, land acquisition, and pollution prevention partnerships.

For more information on your municipal water, visit the U.S. Environmental Protection Agency:
Northern Westchester Joint Water Works Municipal Water Company and EPANorthern Westchester Joint Water Works Municipal Water Report Info
Prior to the formation of the Northern Westchester Joint Water Works (NWJWW), Yorktown received water from the Amawalk plant operated by Westchester County, serving Westchester Water District No. 2, which included Yorktown and portions of Somers and Cortlandt. This 1970s-era plant, which drew water from the Amawalk reservoir, was undergoing expansion.
The Montrose Improvement District operated a 1950s-era plant located by the Catskill Aqueduct, supplying water from the Ashokan reservoir to Montrose, the Village of Buchanan, and most of Cortlandt. In 1986, the EPA established new drinking water standards under the 1974 Safe Drinking Water Act requiring filtration levels neither plant could meet.
Additionally, the New York City DEP notified all users of NYC water that they needed to secure alternative supplies to allow for maintenance and repair work on reservoirs and aqueducts. While Montrose Improvement District evaluated upgrades, Cortlandt and Yorktown each explored building their own facilities.
Studies indicated millions could be saved by constructing a joint plant to replace the MID facility. Discussions progressed slowly until July 1992, when the State Department of Health mandated that surface water sources comply with filtration requirements by June 29, 1993, with possible three-year extensions available if commitment criteria were met.
On July 20, 1995, after years of studies, discussions, reviews, and negotiations, the Towns of Cortlandt and Yorktown alongside the Montrose Improvement District formally established the Northern Westchester Joint Water Works. Representatives from all entities met in the Cortlandt Supervisor's meeting room for this milestone event, passing three resolutions that formed the NWJWW, outlined its operational structure, and arranged for it to assume control of the Amawalk facilities from Westchester County.
Municipal Water Utility Company FAQ

For more information on your municipal water, visit the U.S. CDC:
Northern Westchester Joint Water Works Municipal Water Company and CDC- What do I need to do to start new service? Visit our business office to initiate service. Bring photo ID, closing documents, and a deposit. For properties without previous water service, you'll also need an occupancy permit from the Building Department.
- How do I end my service? Contact our office 24 hours in advance to schedule a final reading. For vacant properties, we'll need to arrange removal of the water meter and service disconnection. Someone must be present on the scheduled day to allow our staff access.
- How long does the Water Department keep my deposit? We retain the deposit until you discontinue service and your account is paid in full.
- Who do I contact regarding a shut-off notice? Please call our main office at (914)737-7676 to speak with a customer service representative.
- Why is my water bill so high? In 90% of cases, inefficient plumbing is responsible. Toilet leaks are the most common cause of unexpectedly high bills.
- How can I detect a toilet leak? If you need to jiggle the handle for proper flushing, you likely have a leak. Another method: place food coloring in the toilet tank, wait one hour without flushing, and check if color appears in the bowl. If it does, you have a leak.
- Is my water hard or soft? Northern Westchester's water is considered moderately hard.
- Why is my water pressure so low? Low pressure at a single source (faucet, shower, etc.) typically indicates an issue with that fixture or its supply pipe. Check for clogged screens or aerators. If pressure is low throughout your property, potential causes include meter problems, aging plumbing, undersized pipes, or significant service line leaks. Contact us at (914)737-7676 if you experience property-wide pressure issues.
- Who maintains the water service line to my property? Property owners are responsible for underground water service lines to individual buildings. The utility maintains the distribution system's underground water mains serving entire neighborhoods.
- How do I get my service line located? Please contact our Distribution department at (914)737-7676.

Northern Westchester Joint Water Works delivers municipal water services to residents of Cortlandt Manor and Cortlandt, New York.
Limited Time: Free Water Safety Report for Northern Westchester Joint Water Works.

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