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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCT1020021
PWS NameSCWA, NORTH STONINGTON DIVISION (NST)
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served1860
County ServedNew London

Note


The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

PWS Violation


Violations

Violation Category CodeViolation Type DescriptionRule NameContaminant NameViolation IDCompliance Status DescriptionCompliance Period Begin DateCompliance Period End DateIs Health Based Ind
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule316Open01-OCT-2024 - No
RPTNotification, E. coli Maximum Contaminant Level Violation (RTCRRevised Total Coliform RuleRevised Total Coliform Rule315Returned to Compliance15-JUL-2017 - No
RPTNotification, E Coli Positive (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule314Returned to Compliance13-JUL-2017 - No
MCLMaximum Contaminant Level Violation, E. coli (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule313Returned to Compliance01-JUL-201731-JUL-2017Yes
MRLead Consumer NoticeLead and Copper RuleLead and Copper Rule312Returned to Compliance30-DEC-2015 - No
MRMonitoring, Source Water (GWR)Ground Water RuleE. COLI311Returned to Compliance15-JUL-2014 - No
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)310Returned to Compliance01-JUL-201431-JUL-2014Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)307Returned to Compliance01-JAN-200731-JAN-2007Yes
OtherConsumer Confidence Report Complete Failure to ReportConsumer Confidence RuleConsumer Confidence Rule205Returned to Compliance01-JUL-2004 - No
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Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
637316SIFState Public Notification received18-APR-2025State -
632315SIFState Public Notification received02-JUL-2018State -
633314SIFState Public Notification received02-JUL-2018State -
623313SIEState Public Notification requested04-AUG-2017State -
619312SOXState Compliance achieved22-MAY-2017State -
617311SIFState Public Notification received25-NOV-2015State -
612310SIFState Public Notification received08-SEP-2014State -
607307SOXState Compliance achieved30-SEP-2007StateRTC
205205SOXState Compliance achieved08-NOV-2004StateCCR-COMPLETED
  • 1 - 9 of 9

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL 127837YesWell Ground waterPermanentActive
WELL 227838YesWell Ground waterPermanentActive
DISTRIBUTION SYSTEM35965NoDistribution System/Zone - - Active
NST BOOSTER STATION59957NoPump Facility - - Active
ENTRY POINT38224NoSampling Station - - Active
ATMOSPHERIC STORAGE TANK36716NoStorage - - Active
BLADDER TANKS59959NoStorage - - Active
HYDROPNUEMATIC TANKS51788NoStorage - - Inactive
TREATMENT PLANT11239NoTreatment Plant - - Active
  • 1 - 9 of 9

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TREATMENT PLANT11239pH AdjustmentCorrosion control
TREATMENT PLANT112394-Log Treatment of VirusesDisinfection
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For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.