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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDIA6050059
PWS NameLARCHWOOD WATER SUPPLY
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water purchased
Primacy TypeState
Is Wholesaler?No
Population Served926
County ServedLyon

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
OtherConsumer Confidence Report Complete Failure to ReportConsumer Confidence RuleConsumer Confidence Rule326425Open01-JUL-2025 - No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM227013Returned to Compliance01-JUL-201331-JUL-2013No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)226913Returned to Compliance01-JUL-201331-JUL-2013No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)722411Returned to Compliance01-NOV-201030-NOV-2010No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine724911Returned to Compliance01-OCT-201031-DEC-2010No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)23710Returned to Compliance01-SEP-200930-SEP-2009No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine281306Returned to Compliance01-JUL-200630-SEP-2006No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)263606Returned to Compliance01-JUN-200630-JUN-2006No
MRMonitoring, RegularRadionuclides and Revised Rad RuleCombined Radium (-226 and -228)273404Returned to Compliance01-APR-200430-JUN-2004No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)53502Returned to Compliance01-SEP-200130-SEP-2001No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)370400Returned to Compliance01-JUN-200030-JUN-2000No
MRMonitoring, Routine Minor (TCR)Total Coliform RuleColiform (TCR)226598Returned to Compliance01-SEP-199830-SEP-1998No
MRMonitoring, RegularNitrate RuleNitrate71499Known01-OCT-199730-SEP-1998No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)190695Returned to Compliance01-JUL-199531-JUL-1995No
MRMonitoring, RegularRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U154400Returned to Compliance01-JUL-199530-JUN-1999No
MCLMaximum Contaminant Level Violation, Single SampleRadionuclides and Revised Rad RuleCombined Radium (-226 and -228)186097Returned to Compliance01-JUL-199130-JUN-1995Yes
MRMonitoring, Repeat Major (TCR)Total Coliform RuleColiform (TCR)12291Returned to Compliance01-SEP-199030-SEP-1990No
MRMonitoring, RegularNitrate RuleNitrate135989Returned to Compliance01-JUL-198630-JUN-1989No
  • 1 - 18 of 18

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
882117326425SFJState Formal Notice of Violation issued21-AUG-2025StateFailure to submit CCR
882114226913SOXState Compliance achieved09-JUL-2014State -
882113227013SOXState Compliance achieved09-JUL-2014State -
12724911SIFState Public Notification received01-MAY-2011State -
8722411SIFState Public Notification received06-JAN-2011State -
423710SIFState Public Notification received05-MAR-2010State -
882106281306SOXState Compliance achieved31-DEC-2006State -
881706263606SIFState Public Notification received07-DEC-2006State -
881304273404SOXState Compliance achieved09-SEP-2004StateHOOKED TO LYON&SIOUX BIG SIOUX (6000755) ON 9/9/04.
82850253502SOXState Compliance achieved05-NOV-2001State -
827700370400SIFState Public Notification received11-SEP-2000State -
880900186097SOXState Compliance achieved01-MAY-2000State -
828600154400SOXState Compliance achieved01-MAY-2000State -
217698226598SIFState Public Notification received12-NOV-1998State -
207695190695SOXState Compliance achieved29-MAY-1996State -
380689135989SF4State Case dropped24-JAN-1991State -
70169112291SFJState Formal Notice of Violation issued20-DEC-1990State -
  • 1 - 17 of 17

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
CC FROM LYON-SIOUX BIG SIOUX, IA600075528906YesConsecutive ConnectionGround waterPermanentActive
WELL # 4 (1988)9124YesWell Ground waterPermanentInactive
ABAN # 1 (1935)9807YesWell Ground waterOtherInactive
WELL #L-1 (2003) LYON-SIOUX RW BIG SIOUX28470YesWell Ground waterOtherInactive
ABAN # 3 (1967)12796YesWell Ground waterOtherInactive
PLUGGED WELL # 2 (1957)12114YesWell Ground waterOtherInactive
DISTRIBUTION SYSTEM2946NoDistribution System/Zone - - Active
GENERAL PWS FACILITY24597NoOther - - Active
SS FROM LYON-SIOUX BIG SIOUX, IA600075528907NoSampling Station - - Active
2(57), 4(88), L-1(2003)/TAP AFTER TREAT6708NoSampling Station - - Inactive
TOTAL ELEVATED STORAGE14954NoStorage - - Inactive
PLANT #218092NoTreatment Plant - - Inactive
  • 1 - 12 of 12

PWS Treatment Processes

Treatment Processes

No treatment process(es) found. EPA has no record of treatment process(es) reported by the primacy agency for this water system.
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.