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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDMI0005020
PWS NameONSTED
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served907
County ServedLenawee

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
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice14Open24-JAN-2026 - No
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule15Open01-JAN-2026 - No
RPTReport Sample Result/Fail Monitor (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule13Returned to Compliance11-DEC-2025 - No
RPTNotification, Known or Potential LSLLead and Copper Rule RevisionsLEAD AND COPPER RULE REVISIONS12Open02-JUL-2025 - No
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule10Open01-OCT-2024 - No
MRMonitoring, RegularArsenic RuleArsenic6Returned to Compliance01-APR-202430-JUN-2024No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)5Returned to Compliance01-AUG-201931-JUL-2020No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM4Returned to Compliance01-AUG-201931-JUL-2020No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)2Returned to Compliance01-NOV-201130-NOV-2011No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)1Returned to Compliance01-OCT-200931-OCT-2009No
  • 1 - 10 of 10

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
4215SIEState Public Notification requested16-MAR-2026State -
3914SIAState Violation/Reminder Notice25-FEB-2026State -
3613SIEState Public Notification requested14-JAN-2026State -
3212SIEState Public Notification requested12-DEC-2025State -
2610SIEState Public Notification requested23-JAN-2025State -
226SIAState Violation/Reminder Notice18-SEP-2024State -
135SOXState Compliance achieved19-JUL-2021State -
134SOXState Compliance achieved19-JUL-2021State -
62SIFState Public Notification received21-MAR-2012State -
21SIEState Public Notification requested23-NOV-2009State -
  • 1 - 10 of 10

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL 110725YesWell Ground waterOtherInactive
WELL 48773YesWell Ground waterPermanentActive
WELL 32387YesWell Ground waterPermanentActive
WELL 22386YesWell Ground waterPermanentActive
WELL 512403YesWell Ground waterPermanentActive
DISTRIBUTION SYSTEM4084NoDistribution System/Zone - - Active
PARK PLANT HIGH SERVICE11214NoPump Facility - - Active
SOUTH PLANT HIGH SERVICE11215NoPump Facility - - Active
SOUTH PLANT TRANSFER PUMP11216NoPump Facility - - Active
PARK PLANT HYDROPNEUMATIC6916NoStorage - - Active
SOUTH PLANT GROUND STORAGE6917NoStorage - - Active
SOUTH PLANT5699NoTreatment Plant - - Active
PARK PLANT WELLS 2 & 45695NoTreatment Plant - - Inactive
  • 1 - 13 of 13

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
PARK PLANT WELLS 2 & 45695Hypochlorination, PreDisinfection
PARK PLANT WELLS 2 & 45695Filtration, Pressure SandIron removal
SOUTH PLANT5699Hypochlorination, PostDisinfection
SOUTH PLANT5699Aeration, CascadeIron removal
SOUTH PLANT5699Filtration, Pressure SandIron removal
  • 1 - 5 of 5

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.