REGIONAL WATER AUTHORITY-ANSONIA
Connecticut - Community Water System - PWSID: CT0020021
System Information
| PWSID | CT0020021 |
| System Name | REGIONAL WATER AUTHORITY-ANSONIA |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Non-Inventory |
| Owner Type | Private |
| EPA Region | 01 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 8, 1979 |
| Last Reported | Mar 30, 2026 |
Location & Contact
| State | Connecticut |
| City | NEW HAVEN |
| ZIP Code | 06511 |
| Address | 90 SARGENT DRIVE |
| Organization | BINGAMAN, LARRY L. |
| Phone | 203-562-4020 |
Population & Service
| Population Served | 29,600 |
| Service Connections | 8,724 |
Drinking Water Violations (54)
This water system has 54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 10, 2005 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2005 | - | |
| Aug 10, 2005 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2005 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2005 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Apr 1, 2005 | Jun 30, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | No | - | 0.7 mg/L | - | Resolved | Sep 26, 2007 | - | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | No | - | 0.7 mg/L | - | Resolved | Sep 26, 2007 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2005 | - |
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.