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PWS ID	IA9778054
PWS Name	SIOUX CITY WATER SUPPLY
PWS Type	Community water system
Owner Type	Local government
Primary Source	Groundwater under influence of surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	85791
County Served	Woodbury

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
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	207924	Returned to Compliance	01-MAY-2024	31-MAY-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	208024	Returned to Compliance	01-MAY-2024	31-MAY-2024	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	60920	Returned to Compliance	01-OCT-2019	31-DEC-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	222619	Returned to Compliance	01-JUL-2019	30-SEP-2019	Yes
TT	Treatment Techniques	Synthetic Organic Chemicals	Epichlorohydrin	116217	Returned to Compliance	06-MAR-2017	07-MAR-2017	Yes
TT	Treatment Techniques	Synthetic Organic Chemicals	Epichlorohydrin	101817	Returned to Compliance	25-NOV-2016	26-NOV-2016	Yes
TT	Treatment Techniques	Synthetic Organic Chemicals	Epichlorohydrin	142616	Returned to Compliance	19-MAY-2016	20-MAY-2016	Yes
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	147015	Returned to Compliance	01-MAY-2015	31-MAY-2015	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	1132812	Returned to Compliance	01-JUL-2012	31-JUL-2012	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	1132712	Returned to Compliance	01-JUN-2012	30-JUN-2012	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1045812	Returned to Compliance	01-APR-2012	30-APR-2012	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	329808	Returned to Compliance	01-JUL-2007	30-JUN-2008	No
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	100705	Returned to Compliance	01-NOV-2004	30-NOV-2004	Yes
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	201804	Returned to Compliance	01-APR-2004	30-APR-2004	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	154504	Returned to Compliance	01-MAR-2004	31-MAR-2004	Yes
Other	Variance/Exemption/Other Compliance	Miscellaneous Other Rules	-	137504	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
Other	Variance/Exemption/Other Compliance	Miscellaneous Other Rules	-	137404	Returned to Compliance	01-JAN-2002	31-DEC-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	576202	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	576302	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	576702	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	576102	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	576502	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	576002	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	575802	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	576602	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	575902	Returned to Compliance	01-JUL-2001	30-JUN-2002	No
Other	Variance/Exemption/Other Compliance	Miscellaneous Other Rules	-	218801	Returned to Compliance	01-JAN-2001	31-DEC-2001	No
Other	Variance/Exemption/Other Compliance	Miscellaneous Other Rules	-	148100	Returned to Compliance	01-MAY-1999	15-NOV-1999	No
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	207997	Returned to Compliance	01-AUG-1997	31-AUG-1997	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	123196	Returned to Compliance	01-JUN-1996	30-JUN-1996	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	128197	Returned to Compliance	01-APR-1993	31-MAR-1997	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	401791	Returned to Compliance	01-JUN-1991	30-JUN-1991	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	17381	Known	24-JUL-1979	23-JUL-1980	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	5280	Known	24-JUL-1979	23-OCT-1980	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
519355	208024	SIF	State Public Notification received	12-MAY-2025	State	Via CCR
519356	207924	SIF	State Public Notification received	12-MAY-2025	State	Via CCR
519347	60920	SOX	State Compliance achieved	11-FEB-2020	State	-
519346	222619	SOX	State Compliance achieved	11-FEB-2020	State	-
519337	116217	SOX	State Compliance achieved	30-APR-2017	State	-
519334	101817	SIF	State Public Notification received	17-JAN-2017	State	-
519332	142616	SOX	State Compliance achieved	30-JUN-2016	State	-
519321	147015	SIF	State Public Notification received	06-JUN-2016	State	-
519314	1132712	SIF	State Public Notification received	24-JUN-2013	State	-
519315	1132812	SIF	State Public Notification received	24-JUN-2013	State	-
519305	1045812	SIF	State Public Notification received	05-JUN-2012	State	-
9	329808	SIF	State Public Notification received	19-SEP-2008	State	-
518704	201804	SOX	State Compliance achieved	01-JAN-2005	State	-
518604	154504	SOX	State Compliance achieved	01-JAN-2005	State	-
518505	100705	SOX	State Compliance achieved	01-JAN-2005	State	-
1	148100	SOX	State Compliance achieved	06-OCT-2003	State	Met all conditions of Consent Decree.
518001	218801	SOX	State Compliance achieved	06-OCT-2003	State	MET ALL CONDITIONS OF CONSENT DECREE.
517804	137504	SOX	State Compliance achieved	06-OCT-2003	State	-
517504	137404	SOX	State Compliance achieved	06-OCT-2003	State	-
516702	576302	SOX	State Compliance achieved	26-AUG-2002	State	-
516902	576502	SOX	State Compliance achieved	26-AUG-2002	State	-
517002	576602	SOX	State Compliance achieved	26-AUG-2002	State	-
517102	576702	SOX	State Compliance achieved	26-AUG-2002	State	-
516302	575902	SOX	State Compliance achieved	26-AUG-2002	State	-
516602	576202	SOX	State Compliance achieved	26-AUG-2002	State	-
516502	576102	SOX	State Compliance achieved	26-AUG-2002	State	-
516402	576002	SOX	State Compliance achieved	26-AUG-2002	State	-
516202	575802	SOX	State Compliance achieved	26-AUG-2002	State	-
211697	207997	SOX	State Compliance achieved	23-FEB-1998	State	-
72797	128197	SIF	State Public Notification received	15-JUL-1997	State	-
294196	123196	SOX	State Compliance achieved	23-NOV-1996	State	-
513291	401791	SOX	State Compliance achieved	01-JUL-1991	State	-
12181	17381	SO7	State Unresolved	19-JAN-1982	State	-
12181	5280	SO7	State Unresolved	19-JAN-1982	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC FROM SERGEANT BLUFF WS, IA9774033	19372	Yes	Consecutive Connection	Ground water under the influence of surface water	Other	Inactive
RIVER #10-1983	9033	Yes	Well	Ground water	Permanent	Active
RIVER #11-1990	8209	Yes	Well	Ground water	Permanent	Active
WELL # 2 (1971)	8198	Yes	Well	Ground water	Permanent	Active
WELL # 1 (1971)	7418	Yes	Well	Ground water	Permanent	Active
REPLACEMENT WELL #2 (RIVER 9R)	36691	Yes	Well	Ground water	Permanent	Active
WELL # 6 (1976)	10620	Yes	Well	Ground water	Permanent	Active
RIVER #9 - 1983	10177	Yes	Well	Ground water	Permanent	Active
RIVER #8 - 1983	13512	Yes	Well	Ground water under the influence of surface water	Permanent	Active
PLUGGED SPAULD #3 1965	9984	Yes	Well	Ground water	Other	Inactive
PLUG-SP #4 1969	9926	Yes	Well	Ground water	Other	Inactive
PLUGGED#2 1918	9485	Yes	Well	Ground water	Other	Inactive
PLUG-SD#20 1949	9236	Yes	Well	Ground water	Other	Inactive
PLUGGED WELL #1 1957	8959	Yes	Well	Ground water	Other	Inactive
PLUGGED RIVER 5 1971	8944	Yes	Well	Ground water	Other	Inactive
PLUGGED WELL # 4 (1971)	8788	Yes	Well	Ground water	Other	Inactive
PLUG-SD#17 1926	7948	Yes	Well	Ground water	Other	Inactive
PLUGGED WESTSD#19A 1974	7836	Yes	Well	Ground water	Other	Inactive
PLUG-SD#16 1912	7499	Yes	Well	Ground water	Other	Inactive
PLUGGED WELL # 3 (1971)	7392	Yes	Well	Ground water	Other	Inactive
PLUGGED#5 1937	7363	Yes	Well	Ground water	Other	Inactive
PLUGGED WELL #22 (2002)	28138	Yes	Well	Ground water	Other	Inactive
PLUGGED WESTSD #18-1941	13360	Yes	Well	Ground water	Other	Inactive
PLUGGED RIVER 7-1980	12944	Yes	Well	Ground water	Other	Inactive
PLUGGED WESTSD #21-1990	10918	Yes	Well	Ground water	Other	Inactive
RIVERFRONT COLLECTOR (1992)	7697	Yes	Infiltration Gallery	Ground water under the influence of surface water	Permanent	Active
SOUTHBRIDGE COLLECTOR WELL #1 (2011)	32939	Yes	Infiltration Gallery	Ground water under the influence of surface water	Permanent	Active
RIVERSIDE COLLECTOR (2006)	30061	Yes	Infiltration Gallery	Ground water under the influence of surface water	Permanent	Active
COMBINED DISTRIBUTION SYSTEM	30619	No	Distribution System/Zone	-	-	Active
DISTRIBUTION SYSTEM	4362	No	Distribution System/Zone	-	-	Active
CC TO DOT-3(I-29RA 015W SGTB), IA9774722	19375	No	Other	-	-	Active
CC TO DOT-3(I-29RA 016E SGTB), IA9774723	19376	No	Other	-	-	Active
CC TO SIOUX TOOLS INC, IA9778195	19377	No	Other	-	-	Active
CC TO SIOUX CITY COUNTRY CLUB, IA9778870	19378	No	Other	-	-	Active
CC TO SIOUX CITY STOCK YARDS, IA9778894	19379	No	Other	-	-	Active
CC TO KIND & KNOX GELATINE, IA9778108	19615	No	Other	-	-	Active
GENERAL PWS FACILITY	26036	No	Other	-	-	Active
CC TO CLOVERLEAF COLD STORAGE, IA9778101	29467	No	Other	-	-	Active
CC TO SOUTH SIOUX CITY NE, NE3104309	29978	No	Other	-	-	Active
CC TO DAKOTA DUNES SD, SD4602093	29979	No	Other	-	-	Active
CC TO SERGEANT BLUFF WS, IA9774033	19374	No	Other	-	-	Inactive
CC TO JOHN MORRELL & COMPANY, IA9778897	19380	No	Other	-	-	Inactive
ZENITH HIGH SERVICE PUMPS	35615	No	Pump Facility	-	-	Active
SOUTHBRIDGE MEMBRANE PUMPS	35616	No	Pump Facility	-	-	Active
SOUTHBRIDGE HIGH SERVICE	35617	No	Pump Facility	-	-	Active
38TH ST PUMPING STATION	35618	No	Pump Facility	-	-	Active
GRANDVIEW PUMPING STATION	35619	No	Pump Facility	-	-	Active
HALF MOON	35620	No	Pump Facility	-	-	Active
520	35621	No	Pump Facility	-	-	Active
WESTERN HILLS	35622	No	Pump Facility	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
ZENITH	17488	Coagulation	Particulate removal
ZENITH	17488	Innovative	Particulate removal
ZENITH	17488	Innovative	Particulate removal
ZENITH	17488	Sedimentation	Particulate removal
ZENITH	17488	Innovative	Particulate removal
ZENITH	17488	Innovative	Particulate removal
ZENITH	17488	Innovative	Particulate removal
ZENITH	17488	Innovative	Particulate removal
ZENITH	17488	Innovative	Particulate removal
ZENITH	17488	Ultraviolet Radiation	Disinfection
ZENITH	17488	Innovative	Disinfection
ZENITH	17488	Innovative	Disinfection
ZENITH	17488	Innovative	Disinfection
ZENITH	17488	Innovative	Other
ZENITH	17488	Fluoridation	Other
ZENITH	17488	Innovative	Iron removal
ZENITH	17488	Innovative	Iron removal
ZENITH	17488	Innovative	Iron removal
ZENITH	17488	Innovative	Iron removal
ZENITH	17488	Innovative	Manganese removal
ZENITH	17488	Innovative	Manganese removal
ZENITH	17488	Innovative	Manganese removal
ZENITH	17488	Innovative	Iron removal
ZENITH	17488	Innovative	Iron removal
ZENITH	17488	Innovative	Iron removal
ZENITH	17488	Permanganate	Iron removal
ZENITH	17488	Innovative	Manganese removal
ZENITH	17488	Permanganate	Manganese removal
ZENITH	17488	Innovative	Corrosion control
ZENITH	17488	Innovative	Corrosion control
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Disinfection
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Disinfection
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Iron removal
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Iron removal
SOUTHBRIDGE REGIONAL PLANT	32940	Permanganate	Iron removal
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Iron removal
SOUTHBRIDGE REGIONAL PLANT	32940	pH Adjustment	Particulate removal
SOUTHBRIDGE REGIONAL PLANT	32940	Coagulation	Particulate removal
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Particulate removal
SOUTHBRIDGE REGIONAL PLANT	32940	Sedimentation	Particulate removal
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Particulate removal
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Corrosion control
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Corrosion control
SOUTHBRIDGE REGIONAL PLANT	32940	Fluoridation	Other
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Other
SOUTHBRIDGE REGIONAL PLANT	32940	Filtration, Ultrafiltration	Particulate removal
SOUTHBRIDGE REGIONAL PLANT	32940	Innovative	Particulate removal

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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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