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PWS IDKS2003903
PWS NameOBERLIN, CITY OF
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served1639
County ServedDecatur

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
RPTNotification, Known or Potential LSLLead and Copper Rule RevisionsLEAD AND COPPER RULE REVISIONS1665Open02-JUL-2025 - No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)1664Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM1663Returned to Compliance01-JAN-202331-DEC-2023No
MRLead Consumer NoticeLead and Copper RuleLead and Copper Rule1636Returned to Compliance30-DEC-2018 - No
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1589Returned to Compliance01-APR-201430-JUN-2014Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1590Returned to Compliance01-APR-201430-JUN-2014Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice1587Returned to Compliance24-JAN-2014 - No
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice1588Returned to Compliance24-JAN-2014 - No
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1585Returned to Compliance01-JAN-201431-MAR-2014Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1586Returned to Compliance01-JAN-201431-MAR-2014Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1584Returned to Compliance01-OCT-201331-DEC-2013Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1583Returned to Compliance01-OCT-201331-DEC-2013Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1581Returned to Compliance01-JUL-201330-SEP-2013Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1582Returned to Compliance01-JUL-201330-SEP-2013Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1579Returned to Compliance01-APR-201330-JUN-2013Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1580Returned to Compliance01-APR-201330-JUN-2013Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1578Returned to Compliance01-JAN-201331-MAR-2013Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1576Returned to Compliance01-JAN-201331-MAR-2013Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1574Returned to Compliance01-OCT-201231-DEC-2012Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1577Returned to Compliance01-OCT-201231-DEC-2012Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1573Returned to Compliance01-JUL-201230-SEP-2012Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1575Returned to Compliance01-JUL-201230-SEP-2012Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1570Returned to Compliance01-APR-201230-JUN-2012Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1569Returned to Compliance01-APR-201230-JUN-2012Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U1572Returned to Compliance01-APR-201230-JUN-2012Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1568Returned to Compliance01-JAN-201231-MAR-2012Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1566Returned to Compliance01-JAN-201231-MAR-2012Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1563Returned to Compliance01-OCT-201131-DEC-2011Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1564Returned to Compliance01-OCT-201131-DEC-2011Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1561Returned to Compliance01-JUL-201130-SEP-2011Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1560Returned to Compliance01-JUL-201130-SEP-2011Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1557Returned to Compliance01-APR-201130-JUN-2011Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1559Returned to Compliance01-APR-201130-JUN-2011Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1556Returned to Compliance01-JAN-201131-MAR-2011Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1554Returned to Compliance01-JAN-201131-MAR-2011Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1551Returned to Compliance01-OCT-201031-DEC-2010Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1553Returned to Compliance01-OCT-201031-DEC-2010Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1550Returned to Compliance01-JUL-201030-SEP-2010Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1548Returned to Compliance01-JUL-201030-SEP-2010Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1547Returned to Compliance01-APR-201030-JUN-2010Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1543Returned to Compliance01-APR-201030-JUN-2010Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1536Returned to Compliance01-JAN-201031-MAR-2010Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1545Returned to Compliance01-JAN-201031-MAR-2010Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice1541Returned to Compliance15-DEC-2009 - No
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1535Returned to Compliance01-OCT-200931-DEC-2009Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1532Returned to Compliance01-OCT-200931-DEC-2009Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice1538Returned to Compliance18-JUL-2009 - No
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1534Returned to Compliance01-JUL-200930-SEP-2009Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1531Returned to Compliance01-JUL-200930-SEP-2009Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium1530Returned to Compliance01-APR-200930-JUN-2009Yes
  • 1 - 50 of 79

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
23861663SOXState Compliance achieved31-JAN-2025Statesystem submitted valid YR2024 samples
23861664SOXState Compliance achieved31-JAN-2025Statesystem submitted valid YR2024 samples
23821636SOXState Compliance achieved22-FEB-2019StateRTC achieved 02-22-19 SOX entered 03-29-19
23801507SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801508SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801510SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801513SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801516SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801522SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801524SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801527SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801530SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801534SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801535SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801545SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801547SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801550SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801553SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801556SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801559SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801561SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801564SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801568SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801570SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801575SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801577SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801578SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801580SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801582SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801584SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801585SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23801589SOXState Compliance achieved13-FEB-2015StateWell 12 and TP006 are now on Inactive/Emergency status, in 3Q2014 none of the other POEs of this system exceeded Combined Uranium MCL. --DCS 02/13/2015
23791518SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791520SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791525SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791528SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791531SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791532SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791536SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791543SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791548SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791551SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791554SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791557SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791560SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791563SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791566SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791569SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791573SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
23791574SOXState Compliance achieved13-FEB-2015StateWell 10 and TP004 are no longer active, they are on Inactive / Emergency status, in 3Q2014 no other POEs of this system exceeded arsenic MCL. --DCS 02/13/2015
  • 1 - 50 of 78

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL 06 EMERGENCY1172YesWell Ground waterEmergencyInactive
WELL 2112726YesWell Ground waterPermanentActive
WELL 2012725YesWell Ground waterPermanentActive
WELL 1912724YesWell Ground waterPermanentActive
WELL 1812723YesWell Ground waterPermanentActive
WELL 1712722YesWell Ground waterPermanentActive
WELL 1612721YesWell Ground waterPermanentActive
WELL 1512720YesWell Ground waterPermanentActive
WELL 1412719YesWell Ground waterPermanentActive
TEST WELL 05019047YesWell Ground waterOtherInactive
TEST WELL 04017750YesWell Ground waterOtherInactive
WELL 07 ABANDONED1339YesWell Ground waterOtherInactive
WELL 09 PLUGGED1338YesWell Ground waterOtherInactive
WELL 08 PLUGGED1171YesWell Ground waterOtherInactive
WELL 12 EMERGENCY9292YesWell Ground waterEmergencyInactive
WELL 11 EMERGENCY2031YesWell Ground waterEmergencyInactive
WELL 05 EMERGENCY1340YesWell Ground waterEmergencyInactive
WELL 10 EMERGENCY1337YesWell Ground waterEmergencyInactive
DISTRIBUTION5139NoDistribution System/Zone - - Active
PUMP FACILITY8417NoPump Facility - - Active
SYSTEM LOCATION11508NoSampling Station - - Active
STORAGE TANK 02 -SOUTH TANK13275NoStorage - - Active
STORAGE TANK 01 NORTH TANK7291NoStorage - - Active
TP00712907NoTreatment Plant - - Active
TP00812909NoTreatment Plant - - Active
TP00912911NoTreatment Plant - - Active
TP001 ABANDONED3886NoTreatment Plant - - Inactive
TP002 EMERGENCY3887NoTreatment Plant - - Inactive
TP003 ABANDONED3888NoTreatment Plant - - Inactive
TP004 EMERGENCY3889NoTreatment Plant - - Inactive
TP005 EMERGENCY3890NoTreatment Plant - - Inactive
TP006 EMERGENCY9293NoTreatment Plant - - Inactive
  • 1 - 32 of 32

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TP00712907Gaseous Chlorination, PreDisinfection
TP00712907Gaseous Chlorination, PostDisinfection
TP00812909Gaseous Chlorination, PostDisinfection
TP00812909Gaseous Chlorination, PreDisinfection
TP00912911Gaseous Chlorination, PostDisinfection
TP00912911Gaseous Chlorination, PreDisinfection
TP003 ABANDONED3888SequestrationInorganics removal
TP003 ABANDONED3888Gaseous Chlorination, PostDisinfection
TP004 EMERGENCY3889SequestrationInorganics removal
TP004 EMERGENCY3889Gaseous Chlorination, PostDisinfection
TP005 EMERGENCY3890SequestrationInorganics removal
TP005 EMERGENCY3890Gaseous Chlorination, PostDisinfection
TP006 EMERGENCY9293Gaseous Chlorination, PostDisinfection
TP006 EMERGENCY9293SequestrationIron removal
TP006 EMERGENCY9293SequestrationManganese removal
  • 1 - 15 of 15

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.