MIDDLESEX WATER COMPANY
New Jersey - Community Water System - PWSID: NJ1225001
System Information
| PWSID | NJ1225001 |
| System Name | MIDDLESEX WATER COMPANY |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 02 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 1, 1980 |
| Last Reported | Mar 27, 2026 |
Location & Contact
| State | New Jersey |
| City | ISELIN |
| ZIP Code | 08830 |
| Address | 485-C ROUTE 1 SOUTH |
| Organization | FULLAGAR, ROBERT |
| Phone | 732-638-7537 |
Population & Service
| Population Served | 233,376 |
| Service Connections | 58,344 |
Drinking Water Violations (89)
This water system has 89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2025 | Jun 30, 2025 | MR | No | No | - | TT | - | Archived | Jun 30, 2025 | - | |
| Jan 1, 2025 | Jun 30, 2025 | MR | No | No | - | TT | - | Archived | Jun 30, 2025 | - | |
| Apr 1, 2023 | - | MR | No | No | - | TT | - | Resolved | May 25, 2023 | - | |
| Apr 1, 2023 | - | MR | No | No | - | TT | - | Resolved | May 25, 2023 | - | |
| Feb 10, 2022 | - | Other | No | No | - | - | - | Resolved | Aug 1, 2023 | - | |
| Jan 1, 2022 | Jun 30, 2022 | MR | No | No | - | TT | - | Resolved | Jun 30, 2022 | - | |
| Jan 1, 2022 | Jun 30, 2022 | MR | No | No | - | TT | - | Resolved | Jun 30, 2022 | - | |
| Jan 1, 2022 | Jun 30, 2022 | MR | No | No | - | TT | - | Resolved | Jun 30, 2022 | - | |
| Jul 1, 2020 | - | Other | No | No | - | - | - | Resolved | Jul 29, 2020 | - | |
| Jul 1, 2020 | - | Other | No | No | - | - | - | Resolved | Jul 29, 2020 | - | |
| Jul 1, 2020 | Dec 31, 2020 | MR | No | No | - | TT | - | Archived | Dec 31, 2020 | - | |
| Jul 1, 2020 | Dec 31, 2020 | MR | No | No | - | TT | - | Archived | Dec 31, 2020 | - | |
| Jul 1, 2020 | Dec 31, 2020 | MR | No | No | - | TT | - | Archived | Dec 31, 2020 | - | |
| Jul 1, 2019 | Dec 31, 2019 | TT | Yes | No | - | TT | - | Resolved | Dec 31, 2019 | - | |
| Jul 1, 2019 | Dec 31, 2019 | TT | Yes | No | - | TT | - | Resolved | Dec 31, 2019 | - | |
| Jul 1, 2019 | Dec 31, 2019 | TT | Yes | No | - | TT | - | Resolved | Dec 31, 2019 | - | |
| Jul 1, 2019 | Dec 31, 2019 | TT | Yes | No | - | TT | - | Resolved | Dec 31, 2019 | - | |
| Oct 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Oct 24, 2018 | - | |
| Oct 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Oct 24, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Jul 23, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Jul 23, 2018 | - | |
| Jul 1, 2017 | Dec 31, 2017 | MR | No | No | - | TT | - | Resolved | Jul 10, 2017 | - | |
| Jul 1, 2017 | Dec 31, 2017 | MR | No | No | - | TT | - | Resolved | Jul 10, 2017 | - | |
| Jan 1, 2017 | Jun 30, 2017 | MR | No | No | - | TT | - | Resolved | Feb 21, 2017 | - | |
| Jan 1, 2017 | Jun 30, 2017 | MR | No | No | - | TT | - | Resolved | Feb 21, 2017 | - | |
| Oct 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Oct 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Jun 1, 2014 | Aug 31, 2014 | MR | No | No | - | 0.080 mg/L | - | Resolved | Aug 8, 2014 | - | |
| Jun 1, 2014 | Aug 31, 2014 | MR | No | No | - | 0.080 mg/L | - | Resolved | Aug 8, 2014 | - | |
| Jun 1, 2014 | Aug 31, 2014 | MR | No | No | - | 0.080 mg/L | - | Resolved | Aug 8, 2014 | - | |
| Jan 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 10 mg/L | - | Resolved | May 7, 2014 | - | |
| Jan 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 10 mg/L | - | Resolved | May 7, 2014 | - | |
| Jun 1, 2013 | Jun 30, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2013 | - | |
| Jun 1, 2013 | Jun 30, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2013 | - | |
| Sep 1, 2012 | Nov 30, 2012 | MR | No | No | - | 0.080 mg/L | - | Resolved | Nov 5, 2012 | - | |
| Sep 1, 2012 | Nov 30, 2012 | MR | No | No | - | 0.080 mg/L | - | Resolved | Nov 5, 2012 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2005 | - | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2003 | - | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2003 | - | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | - | 0.6 mg/L | - | Resolved | Jun 30, 1998 | - | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Jun 30, 1998 | - | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Jun 30, 1998 | - | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Jun 30, 1998 | - | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | - | 0.007 mg/L | - | Resolved | Jun 30, 1998 | - | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Jun 30, 1998 | - |
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.