Public water system · IA9778054
ActiveSioux City Water Supply
Community water system in Woodbury County, Iowa, drawing primarily on groundwater under influence of surface water.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
85,791
Service connections
29,424
Primary source
GU
Groundwater under influence of surface water
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-05-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2024-05-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2019-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2019-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2017-03-06 | Required treatment not metTreatment Techniques · code 07 | Epichlorohydrincode 2257 | Yes | Resolved |
| 2016-11-25 | Required treatment not metTreatment Techniques · code 07 | Epichlorohydrincode 2257 | Yes | Resolved |
| 2016-05-19 | Required treatment not metTreatment Techniques · code 07 | Epichlorohydrincode 2257 | Yes | Resolved |
| 2015-05-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2012-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2012-04-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2007-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Sioux City Water Supply: frequently asked questions
Is Sioux City Water Supply's water safe to drink?
Sioux City Water Supply is an active community water system regulated under the Safe Drinking Water Act, overseen by the IA state drinking water program. EPA's SDWA data records violations for this system — the most recent are listed on this page, including health-based violations; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.
Who runs Sioux City Water Supply?
Sioux City Water Supply (PWSID IA9778054) is a local government-owned community water system, regulated by the IA state drinking water program.
How many people does Sioux City Water Supply serve?
Sioux City Water Supply reports serving 85,791 people through 29,424 service connections in Woodbury County, Iowa.
Where does Sioux City Water Supply get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water.
Other water systems in Woodbury County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sergeant Bluff Water Supply | Woodbury | 5,015 | Community | Groundwater |
| Moville Water Supply | Woodbury | 1,687 | Community | Groundwater |
| Sloan Water Supply | Woodbury | 1,042 | Community | Groundwater |
| Lawton Water Supply | Woodbury | 988 | Community | Groundwater |
| Correctionville Water Supply | Woodbury | 766 | Community | Groundwater |
| Anthon Municipal Water System | Woodbury | 545 | Community | Groundwater |
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