Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	WI6420254
PWS Name	TOMAH WATERWORKS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	9192
County Served	Monroe

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.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	2500043	Known	01-APR-2025	30-JUN-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1800023	Returned to Compliance	01-APR-2018	30-JUN-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1800022	Returned to Compliance	01-JAN-2018	31-MAR-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1800021	Returned to Compliance	01-OCT-2017	31-DEC-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1700020	Returned to Compliance	01-JUL-2017	30-SEP-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1700019	Returned to Compliance	01-APR-2017	30-JUN-2017	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1700018	Returned to Compliance	15-FEB-2017	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1700017	Returned to Compliance	01-JAN-2017	31-MAR-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1700015	Returned to Compliance	01-OCT-2016	31-DEC-2016	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1600013	Returned to Compliance	26-JUL-2016	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1600014	Returned to Compliance	26-JUL-2016	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1600012	Returned to Compliance	01-JUL-2016	30-SEP-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1600011	Returned to Compliance	01-APR-2016	30-JUN-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1600009	Returned to Compliance	01-JAN-2016	31-MAR-2016	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1600010	Returned to Compliance	18-DEC-2015	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1600008	Returned to Compliance	06-OCT-2015	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1600007	Returned to Compliance	01-OCT-2015	31-DEC-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1500006	Returned to Compliance	01-JUL-2015	30-SEP-2015	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1500005	Returned to Compliance	01-JUL-2015	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1500004	Returned to Compliance	01-APR-2015	30-JUN-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1500003	Returned to Compliance	01-JAN-2015	31-MAR-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1500002	Returned to Compliance	01-OCT-2014	31-DEC-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	9700001	Returned to Compliance	01-JAN-1996	03-NOV-1997	Yes
MCL	Maximum Contaminant Level Violation, Average	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	93V0001	Known	01-JAN-1993	31-MAR-1993	Yes

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
2500132	2500043	SFL	State Administrative/Compliance Order without penalty issued	22-AUG-2025	State	-
1800106	1500004	SOX	State Compliance achieved	08-AUG-2018	State	-
1800117	1800022	SOX	State Compliance achieved	08-AUG-2018	State	-
1800116	1800021	SOX	State Compliance achieved	08-AUG-2018	State	-
1800115	1700020	SOX	State Compliance achieved	08-AUG-2018	State	-
1800114	1700019	SOX	State Compliance achieved	08-AUG-2018	State	-
1800113	1700017	SOX	State Compliance achieved	08-AUG-2018	State	-
1800112	1700015	SOX	State Compliance achieved	08-AUG-2018	State	-
1800111	1600012	SOX	State Compliance achieved	08-AUG-2018	State	-
1800104	1500002	SOX	State Compliance achieved	08-AUG-2018	State	-
1800105	1500003	SOX	State Compliance achieved	08-AUG-2018	State	-
1800118	1800023	SOX	State Compliance achieved	08-AUG-2018	State	-
1800107	1500006	SOX	State Compliance achieved	08-AUG-2018	State	-
1800108	1600007	SOX	State Compliance achieved	08-AUG-2018	State	-
1800109	1600009	SOX	State Compliance achieved	08-AUG-2018	State	-
1800110	1600011	SOX	State Compliance achieved	08-AUG-2018	State	-
1700059	1700018	SOX	State Compliance achieved	19-JUN-2017	State	-
1700050	1600014	SOX	State Compliance achieved	01-NOV-2016	State	-
1700049	1600013	SOX	State Compliance achieved	01-NOV-2016	State	-
1600038	1600010	SOX	State Compliance achieved	29-APR-2016	State	-
1600037	1600008	SOX	State Compliance achieved	29-APR-2016	State	-
1600030	1500005	SOX	State Compliance achieved	25-NOV-2015	State	-
0400004	9700001	SFL	State Administrative/Compliance Order without penalty issued	04-DEC-2003	State	-
93E0002	93V0001	SIA	State Violation/Reminder Notice	04-MAY-1993	State	TOMAH WW NON FOR VOC VIOL

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
BG499	8	Yes	Well	Ground water	Emergency	Inactive
AY369	99	Yes	Well	Ground water	Permanent	Inactive
EM264	98	Yes	Well	Ground water	Permanent	Inactive
SB744	97	Yes	Well	Ground water	Permanent	Inactive
SB746	96	Yes	Well	Ground water	Permanent	Inactive
AY382	9	Yes	Well	Ground water	Permanent	Inactive
BG494	7	Yes	Well	Ground water	Permanent	Inactive
BG492	4	Yes	Well	Ground water	Permanent	Inactive
BG491	3	Yes	Well	Ground water	Permanent	Inactive
YO934	14	Yes	Well	Ground water	Permanent	Inactive
BG493	6	Yes	Well	Ground water	Permanent	Active
SB749	12	Yes	Well	Ground water	Permanent	Active
NZ651	11	Yes	Well	Ground water	Permanent	Active
EM264	10	Yes	Well	Ground water	Permanent	Active
64202545	64202545	No	Distribution System/Zone	-	-	Active
EM264	10T	No	Treatment Plant	-	-	Active
NZ651	11T	No	Treatment Plant	-	-	Active
SB749	12T	No	Treatment Plant	-	-	Active
BG493	6T	No	Treatment Plant	-	-	Active
YO934	14T	No	Treatment Plant	-	-	Inactive
BG499	8T	No	Treatment Plant	-	-	Inactive
SB746	96T	No	Treatment Plant	-	-	Inactive
SB744	97T	No	Treatment Plant	-	-	Inactive
EM264	98T	No	Treatment Plant	-	-	Inactive
AY382	9T	No	Treatment Plant	-	-	Inactive

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
EM264	10T	Filtration, Pressure Sand	Radionuclides removal
EM264	10T	Hypochlorination, Post	Disinfection
EM264	10T	Inhibitor, Polyphosphate	Corrosion control
EM264	10T	Permanganate	Iron removal
EM264	10T	pH Adjustment	Corrosion control
NZ651	11T	Hypochlorination, Post	Disinfection
NZ651	11T	Inhibitor, Polyphosphate	Corrosion control
SB749	12T	Hypochlorination, Post	Disinfection
SB749	12T	Inhibitor, Polyphosphate	Corrosion control
YO934	14T	Filtration, Pressure Sand	Radionuclides removal
YO934	14T	Hypochlorination, Post	Disinfection
YO934	14T	Inhibitor, Polyphosphate	Corrosion control
YO934	14T	Permanganate	Iron removal
YO934	14T	pH Adjustment	Corrosion control
BG493	6T	Aeration, Diffused	Iron removal
BG493	6T	Filtration, Greensand	Iron removal
BG493	6T	Filtration, Greensand	Manganese removal
BG493	6T	Hypochlorination, Post	Disinfection
BG493	6T	Hypochlorination, Pre	Iron removal
BG493	6T	Hypochlorination, Pre	Manganese removal
BG493	6T	Inhibitor, Polyphosphate	Corrosion control
BG493	6T	Permanganate	Iron removal
BG499	8T	Hypochlorination, Post	Disinfection
BG499	8T	Inhibitor, Polyphosphate	Corrosion control
AY382	9T	Hypochlorination, Post	Disinfection
AY382	9T	Inhibitor, Polyphosphate	Corrosion control

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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.

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