THE GRUMMAN HILL MONTESSORI ASSOCIATION
Connecticut — Non-Transient Non-Community — PWSID: CT1615113
System Information
| PWSID | CT1615113 |
| System Name | THE GRUMMAN HILL MONTESSORI ASSOCIATION |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 01 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Jan 17, 1998 |
| Last Reported | Dec 15, 2025 |
Location & Contact
| State | Connecticut |
| City | WILTON |
| ZIP Code | 06897 |
| Address | 34 Whipple Road |
| Organization | AMADOR, LOIS C |
| Phone | 203-834-0440 |
Population & Service
| Population Served | 259 |
| Service Connections | 1 |
Drinking Water Violations (114)
This water system has 114 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, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 6, 2022 | Lead and Copper Rule |
| Jul 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 6, 2022 | Lead and Copper Rule |
| Jul 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 6, 2022 | Lead and Copper Rule |
| Jul 1, 2022 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 6, 2022 | Lead and Copper Rule |
| Jul 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 27, 2019 | Lead and Copper Rule |
| Jul 1, 2019 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 27, 2019 | Lead and Copper Rule |
| Apr 1, 2017 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 4, 2017 | Lead and Copper Rule |
| Sep 29, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jun 9, 2017 | Lead and Copper Rule |
| Sep 29, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jun 9, 2017 | Lead and Copper Rule |
| Mar 9, 2016 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 9, 2016 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 9, 2016 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 9, 2016 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 9, 2016 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 9, 2016 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Sep 29, 2015 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Sep 29, 2015 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Apr 1, 2015 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Apr 1, 2015 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Sep 29, 2014 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Sep 29, 2014 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Apr 1, 2014 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Apr 1, 2014 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Aug 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 22, 2016 | Lead and Copper Rule |
| Aug 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 22, 2016 | Lead and Copper Rule |
| Aug 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 22, 2016 | Lead and Copper Rule |
| Aug 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 22, 2016 | Lead and Copper Rule |
| Jul 1, 2013 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Jul 1, 2013 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Jul 1, 2013 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Jul 1, 2013 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Apr 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Apr 1, 2013 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 2, 2013 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 2, 2013 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Jul 1, 2012 | Dec 31, 2012 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2012 | Lead and Copper Rule |
| Jul 1, 2012 | Dec 31, 2012 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2012 | Lead and Copper Rule |
| Jul 1, 2012 | Dec 31, 2012 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2012 | Lead and Copper Rule |
| Jul 1, 2012 | Dec 31, 2012 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2012 | Lead and Copper Rule |
| Mar 31, 2012 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Mar 31, 2012 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Sep 29, 2011 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Sep 29, 2011 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Mar 15, 2016 | Lead and Copper Rule |
| Jul 30, 2010 | — | Public Notice | Other | No | No | — | — | — | Resolved | Mar 1, 2014 | Public Notice Rule and Revised PN Rule |
| Jul 30, 2010 | — | Public Notice | Other | No | No | — | — | — | Resolved | Mar 1, 2014 | Public Notice Rule and Revised PN Rule |
| Jan 1, 2010 | Dec 31, 2010 | trans-1,2-Dichloroethylene | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2010 | Volatile Organic Chemicals |
| Jan 1, 2010 | Dec 31, 2010 | 1,2-Dichloropropane | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2010 | Volatile Organic Chemicals |
| Jan 1, 2010 | Dec 31, 2010 | Tetrachloroethylene | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2010 | Volatile Organic Chemicals |
| Jan 1, 2010 | Dec 31, 2010 | 1,1,1-Trichloroethane | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2010 | Volatile Organic Chemicals |
| Jan 1, 2010 | Dec 31, 2010 | 1,1,1-Trichloroethane | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Dec 31, 2010 | Volatile Organic Chemicals |
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.