Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	WI2410172
PWS Name	OAK CREEK WATERWORKS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	Yes
Population Served	32104
County Served	Milwaukee

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
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	2500234	Open	17-OCT-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	2500233	Returned to Compliance	17-OCT-2024	-	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	2100216	Returned to Compliance	01-JAN-2021	31-MAR-2021	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2100215	Returned to Compliance	01-JAN-2021	31-MAR-2021	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1900214	Returned to Compliance	01-JAN-2019	31-MAR-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1900212	Returned to Compliance	01-OCT-2018	31-DEC-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1800210	Returned to Compliance	01-JUL-2018	30-SEP-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1800209	Returned to Compliance	01-APR-2018	30-JUN-2018	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1400206	Returned to Compliance	01-JAN-2014	31-MAR-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1400205	Returned to Compliance	01-JAN-2014	31-MAR-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1400204	Returned to Compliance	01-OCT-2013	31-DEC-2013	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1400203	Returned to Compliance	01-OCT-2013	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	0300193	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	0300192	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	0300197	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	0300151	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	0300150	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	0300188	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	0300186	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	0300185	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	0300184	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb	0300183	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	0300182	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfone	0300180	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfoxide	0300179	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	0300178	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	0300177	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	0300176	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	0300175	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	0300174	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	0300173	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	0300172	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	0300171	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	0300170	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	0300167	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	0300166	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	0300165	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	0300164	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	0300162	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	0300161	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	0300160	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	0300153	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	0300154	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	0300155	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	0300156	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Nitrate Rule	Nitrite	0300157	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	0300158	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	0300194	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	0300195	Returned to Compliance	01-JAN-2002	30-SEP-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	0300152	Returned to Compliance	01-JAN-2002	30-SEP-2002	No

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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
2500072	2500233	SOX	State Compliance achieved	29-MAY-2025	State	-
2300069	2100215	SIF	State Public Notification received	21-MAR-2023	State	-
2300069	2100216	SIF	State Public Notification received	21-MAR-2023	State	-
1900060	1800209	SIF	State Public Notification received	08-JUN-2019	State	-
2000062	1800210	SOX	State Compliance achieved	09-APR-2019	State	-
2000063	1900212	SOX	State Compliance achieved	09-APR-2019	State	-
2000064	1900214	SOX	State Compliance achieved	09-APR-2019	State	-
1500042	1400206	SOX	State Compliance achieved	21-JAN-2015	State	-
1500042	1400205	SOX	State Compliance achieved	21-JAN-2015	State	-
1400040	1400204	SIF	State Public Notification received	26-SEP-2014	State	-
1400040	1400203	SIF	State Public Notification received	26-SEP-2014	State	-
0300028	0300150	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300149	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300152	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300153	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300154	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300155	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300156	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300157	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300158	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300160	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300161	SOX	State Compliance achieved	01-JAN-2003	State	-
0300028	0300162	SOX	State Compliance achieved	01-JAN-2003	State	-
0300026	0300163	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300164	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300165	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300166	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300167	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300170	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300171	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300172	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300173	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300174	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300175	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300176	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300177	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300178	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300179	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300180	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300182	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300183	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300184	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300185	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300186	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300188	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300192	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300193	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300194	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300195	SOX	State Compliance achieved	01-JAN-2003	State	-
0300027	0300197	SOX	State Compliance achieved	01-JAN-2003	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
2	2	Yes	Intake	Surface water	Permanent	Active
BG458	5	Yes	Well	Ground water	Permanent	Inactive
BG460	4	Yes	Well	Ground water	Permanent	Inactive
BG459	3	Yes	Well	Ground water	Permanent	Inactive
1	1	Yes	Intake	Surface water	Permanent	Inactive
24101726	24101726	No	Distribution System/Zone	-	-	Active
100	100	No	Other	-	-	Active
100	100T	No	Treatment Plant	-	-	Active
2	2T	No	Treatment Plant	-	-	Active

1 - 9 of 9

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
100	100T	Coagulation	Particulate removal
100	100T	Filtered	Particulate removal
100	100T	Flocculation	Particulate removal
100	100T	Fluoridation	Other
100	100T	Hypochlorination, Post	Disinfection
100	100T	Hypochlorination, Pre	Disinfection
100	100T	Rapid Mix	Particulate removal
100	100T	Sedimentation	Particulate removal
2	2T	Permanganate	Organics removal

1 - 9 of 9

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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