Drinking Water Compliance OS

THOMPSON, CT · Windham County

MARIANAPOLIS PREP SCHOOL - ST JOHNS Water System

Current status

1 open health-based violation on record as of July 4, 2026, alongside 1 other open item(s). See the violation history below for contaminant and status details.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Connecticut’s official records. Always confirm current status with Connecticut before making decisions based on this information.

System facts

System ID (PWSID)
CT1410051
System type
Community Water System
Population served
128
Service connections
1
Ownership
privately owned
Water source
groundwater (wells)

Violation history

  • LSL Reporting

    LEAD AND COPPER RULE REVISIONS

    October 17, 2024

    Unaddressed
  • LSL Inventory

    Health-based

    LEAD AND COPPER RULE REVISIONS

    October 17, 2024

    Unaddressed
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    August 10, 2019 – January 21, 2020

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2019 – January 21, 2020

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    October 1, 2018 – December 31, 2018

    Resolved
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    August 10, 2018 – June 25, 2018

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2015 – July 9, 2015

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2014 – January 14, 2015

    Resolved
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    August 10, 2012 – July 14, 2014

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2012 – July 14, 2014

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2010 – December 21, 2010

    Resolved
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    August 10, 2008 – December 30, 2008

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    June 5, 2008 – June 15, 2011

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 11, 2007 – February 4, 2008

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    Styrene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    Toluene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Regular

    Benzene

    October 1, 2007 – December 31, 2007

    Resolved
  • Consumer Confidence Report Inadequate Reporting

    Consumer Confidence Rule

    August 10, 2007 – August 14, 2007

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2007 – September 30, 2007

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2007 – August 14, 2007

    Resolved
  • Monitoring, Regular

    Glyphosate

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Methoxychlor

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Toxaphene

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Aldicarb sulfoxide

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Aldicarb sulfone

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Carbofuran

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Aldicarb

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Atrazine

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    LASSO

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Heptachlor

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    2,4-D

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Chlordane

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Endrin

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Dalapon

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Diquat

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    OXAMYL

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Simazine

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Picloram

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    January 1, 2007 – March 31, 2007

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    January 1, 2007 – March 31, 2007

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2006 – July 12, 2006

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    April 1, 2006 – June 30, 2006

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    April 1, 2006 – June 30, 2006

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    March 23, 2006 – May 17, 2007

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2006 – March 31, 2006

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    January 1, 2006 – March 31, 2006

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    July 1, 2005 – September 30, 2005

    Resolved
  • Monitoring, Regular

    Combined Uranium

    April 1, 2005 – June 30, 2005

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    April 1, 2005 – June 30, 2005

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    April 1, 2005 – June 30, 2005

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    April 1, 2005 – June 30, 2005

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    October 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    April 1, 2004 – June 30, 2004

    Resolved
  • Monitoring, Regular

    Combined Uranium

    April 1, 2004 – June 30, 2004

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    April 1, 2004 – June 30, 2004

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    January 1, 2004 – March 31, 2004

    Resolved
  • Monitoring, Regular

    Combined Uranium

    January 1, 2004 – March 31, 2004

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    January 1, 2004 – March 31, 2004

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    December 1, 2003 – December 31, 2003

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    October 1, 2003 – December 31, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    June 1, 2003 – June 30, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    April 1, 2003 – April 30, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    October 1, 2002 – December 31, 2002

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 1993 – August 31, 1993

    Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

Contact

VITALIS, RANDY

860-923-9565

THOMPSON, CT 06277