WESTCHESTER JOINT WATER WORKS
New York - Community Water System - PWSID: NY5903435
System Information
| PWSID | NY5903435 |
| System Name | WESTCHESTER JOINT WATER WORKS |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 02 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 29, 1981 |
| Last Reported | Mar 27, 2026 |
Location & Contact
| State | New York |
| City | MAMARONECK |
| ZIP Code | 10543 |
| Address | Village of Mamaroneck |
| Organization | MURPHY, THOMAS A |
| Phone | 914-777-7722 |
Population & Service
| Population Served | 59,629 |
| Service Connections | 12,000 |
Drinking Water Violations (66)
This water system has 66 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Sep 12, 2019 | - | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Sep 12, 2019 | - | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Sep 12, 2019 | - | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Sep 12, 2019 | - | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Sep 12, 2019 | - | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Jun 27, 2019 | - | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Jun 27, 2019 | - | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Jun 27, 2019 | - | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Jun 27, 2019 | - | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Jun 27, 2019 | - | |
| Apr 1, 2019 | Jun 30, 2019 | MCL | Yes | No | .061 MG/L | 0.060 mg/L | .06 | Resolved | Jun 27, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | .068 MG/L | 0.060 mg/L | .06 | Resolved | Mar 29, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | .068 MG/L | 0.060 mg/L | .06 | Resolved | Mar 29, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | .068 MG/L | 0.060 mg/L | .06 | Resolved | Mar 29, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | .068 MG/L | 0.060 mg/L | .06 | Resolved | Mar 29, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | .068 MG/L | 0.060 mg/L | .06 | Resolved | Mar 29, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | .068 MG/L | 0.060 mg/L | .06 | Resolved | Mar 29, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MCL | Yes | No | .068 MG/L | 0.060 mg/L | .06 | Resolved | Mar 29, 2019 | - | |
| May 1, 2015 | - | TT | Yes | No | - | - | - | Resolved | Jul 21, 2016 | - | |
| May 1, 2015 | - | TT | Yes | No | - | - | - | Resolved | Jul 21, 2016 | - | |
| May 1, 2015 | - | TT | Yes | No | - | - | - | Resolved | Jul 21, 2016 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | - | MR | No | No | - | TT | - | Resolved | Jul 27, 2010 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | - | MR | No | No | - | TT | - | Resolved | Jul 27, 2010 | - | |
| Jan 1, 2009 | - | MR | No | No | - | TT | - | Resolved | Jul 27, 2010 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Jan 1, 2009 | Jun 30, 2009 | MR | No | No | - | TT | - | Resolved | Jun 30, 2009 | - | |
| Oct 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Sep 30, 2008 | - | |
| Oct 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Sep 30, 2008 | - | |
| Oct 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Sep 30, 2008 | - | |
| Oct 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Sep 30, 2008 | - | |
| Oct 1, 2007 | - | MR | No | No | - | TT | - | Resolved | Sep 30, 2008 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2005 | - | |
| Jun 30, 1993 | - | TT | Yes | No | - | - | - | Addressed | - | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.