SUFFOLK COUNTY WATER AUTHORITY
New York - Community Water System - PWSID: NY5110526
System Information
| PWSID | NY5110526 |
| System Name | SUFFOLK COUNTY WATER AUTHORITY |
| System Type | Community Water System |
| Water Source | Ground 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 | HAUPPAUGE |
| ZIP Code | 11788 |
| Address | P.O. Box 18043 |
| Organization | SCHNEIDER, THOMAS |
| Phone | 631-563-0258 |
Population & Service
| Population Served | 1,100,000 |
| Service Connections | 336,418 |
Drinking Water Violations (42)
This water system has 42 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, 2020 | Sep 30, 2020 | MCL | Yes | No | 26.62 MFL | 7 MFL | - | Resolved | Sep 3, 2020 | - | |
| Jul 1, 2020 | Sep 30, 2020 | MCL | Yes | No | 26.62 MFL | 7 MFL | - | Resolved | Sep 3, 2020 | - | |
| Jul 1, 2020 | Sep 30, 2020 | MCL | Yes | No | 26.62 MFL | 7 MFL | - | Resolved | Sep 3, 2020 | - | |
| Aug 1, 2018 | Aug 31, 2018 | MON | No | No | - | - | - | Resolved | Aug 31, 2018 | - | |
| Aug 1, 2018 | Aug 31, 2018 | MON | No | No | - | - | - | Resolved | Aug 31, 2018 | - | |
| Aug 1, 2018 | Aug 31, 2018 | MON | No | No | - | - | - | Resolved | Aug 31, 2018 | - | |
| Jan 1, 2017 | Jan 31, 2017 | MON | No | No | - | - | - | Archived | Jan 31, 2017 | - | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | No | - | - | - | Resolved | Dec 31, 2008 | - | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | No | - | - | - | Resolved | Dec 31, 2008 | - | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | No | - | - | - | Resolved | Dec 31, 2008 | - | |
| Sep 1, 2006 | Sep 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2006 | - | |
| Sep 1, 2006 | Sep 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2006 | - | |
| Sep 1, 2006 | Sep 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2006 | - | |
| Sep 1, 2006 | Sep 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2006 | - | |
| Sep 1, 2006 | Sep 30, 2006 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2006 | - | |
| Jan 1, 2002 | Dec 31, 2002 | MCL | Yes | No | 11.11 MG/L | 10 mg/L | 10 | Resolved | Nov 6, 2002 | - | |
| Jan 1, 2002 | Dec 31, 2002 | MCL | Yes | No | 11.11 MG/L | 10 mg/L | 10 | Resolved | Nov 6, 2002 | - | |
| Jan 1, 2002 | Dec 31, 2002 | MCL | Yes | No | 11.11 MG/L | 10 mg/L | 10 | Resolved | Nov 6, 2002 | - | |
| Jan 1, 2002 | Dec 31, 2002 | MCL | Yes | No | 11.11 MG/L | 10 mg/L | 10 | Resolved | Nov 6, 2002 | - | |
| Jan 1, 2002 | Dec 31, 2002 | MCL | Yes | No | 11.11 MG/L | 10 mg/L | 10 | Resolved | Nov 6, 2002 | - | |
| Jan 1, 2002 | Dec 31, 2002 | MCL | Yes | No | 11.11 MG/L | 10 mg/L | 10 | Resolved | Nov 6, 2002 | - | |
| Apr 1, 1985 | Mar 31, 1988 | MR | No | Yes | - | 0.05 mg/L | - | Archived | Mar 31, 1988 | - | |
| Apr 1, 1985 | Mar 31, 1988 | MR | No | Yes | - | 0.04 mg/L | - | Archived | Mar 31, 1988 | - | |
| Apr 1, 1985 | Mar 31, 1988 | MR | No | Yes | - | 0.003 mg/L | - | Archived | Mar 31, 1988 | - | |
| Apr 1, 1985 | Mar 31, 1988 | MR | No | Yes | - | 0.07 mg/L | - | Archived | Mar 31, 1988 | - | |
| Apr 1, 1985 | Mar 31, 1988 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Mar 31, 1988 | - | |
| Apr 1, 1985 | Mar 31, 1988 | MR | No | Yes | - | 0.0002 mg/L | - | Archived | Mar 31, 1988 | - | |
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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.