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 | Mar 30, 2026 |
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 (118)
This water system has 118 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 | - | MR | No | No | - | TT | - | Resolved | Dec 6, 2022 | - | |
| Jul 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Dec 6, 2022 | - | |
| Jul 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Dec 6, 2022 | - | |
| Jul 1, 2022 | - | MR | No | No | - | TT | - | Resolved | Dec 6, 2022 | - | |
| Jul 1, 2019 | - | MR | No | No | - | TT | - | Resolved | Sep 27, 2019 | - | |
| Jul 1, 2019 | - | MR | No | No | - | TT | - | Resolved | Sep 27, 2019 | - | |
| Apr 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Dec 4, 2017 | - | |
| Sep 29, 2016 | - | MR | No | No | - | TT | - | Resolved | Jun 9, 2017 | - | |
| Sep 29, 2016 | - | MR | No | No | - | TT | - | Resolved | Jun 9, 2017 | - | |
| Mar 9, 2016 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 9, 2016 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 9, 2016 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 9, 2016 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 9, 2016 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 9, 2016 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Sep 29, 2015 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Sep 29, 2015 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Apr 1, 2015 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Apr 1, 2015 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Sep 29, 2014 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Sep 29, 2014 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Apr 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Apr 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Aug 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Feb 22, 2016 | - | |
| Aug 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Feb 22, 2016 | - | |
| Aug 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Feb 22, 2016 | - | |
| Aug 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Feb 22, 2016 | - | |
| Jul 1, 2013 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Jul 1, 2013 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Jul 1, 2013 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Jul 1, 2013 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Apr 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Apr 1, 2013 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 2, 2013 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 2, 2013 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Jul 1, 2012 | Dec 31, 2012 | MR | No | No | - | TT | - | Resolved | Dec 31, 2012 | - | |
| Jul 1, 2012 | Dec 31, 2012 | MR | No | No | - | TT | - | Resolved | Dec 31, 2012 | - | |
| Jul 1, 2012 | Dec 31, 2012 | MR | No | No | - | TT | - | Resolved | Dec 31, 2012 | - | |
| Jul 1, 2012 | Dec 31, 2012 | MR | No | No | - | TT | - | Resolved | Dec 31, 2012 | - | |
| Mar 31, 2012 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Mar 31, 2012 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Sep 29, 2011 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Sep 29, 2011 | - | MR | No | No | - | TT | - | Resolved | Mar 15, 2016 | - | |
| Jul 30, 2010 | - | Other | No | No | - | - | - | Resolved | Mar 1, 2014 | - | |
| Jul 30, 2010 | - | Other | No | No | - | - | - | Resolved | Mar 1, 2014 | - | |
| Mar 25, 2010 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.075 mg/L | - | Resolved | Dec 31, 2010 | - | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2010 | - |
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.