Sioux City Water Quality
Iowa
The tap water in Sioux City, Iowa is served by 2 EPA-regulated water systems covering approximately 85,824 people. 10 health-based violations are on record, most recently for 2950 in 2019. Data source: EPA Safe Drinking Water Information System.
Drinking water in Sioux City, Iowa is delivered through 2 EPA-regulated community water systems serving an estimated 85,824 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
The SDWIS record for Sioux City shows 10 total violations across all 2 systems, of which 10 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 2950, 2257. 21 TRI-reporting industrial facilities are also located within the city limits.
A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Iowa drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| SIOUX CITY WATER SUPPLY | 85,791 | 10 | Health |
| BEREA HEIGHTS INC | 33 | 0 | Clean |
Does this city have health-based water violations?
Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.
| Contaminant | Begin Date |
|---|---|
| 2950 | 2019-10-01 |
| 2950 | 2019-10-01 |
| 2950 | 2019-07-01 |
| 2950 | 2019-07-01 |
| 2257 | 2017-03-06 |
| 2257 | 2017-03-06 |
| 2257 | 2016-11-25 |
| 2257 | 2016-11-25 |
| 2257 | 2016-05-19 |
| 2257 | 2016-05-19 |
TRI Facilities in Sioux City
| Facility | Total Releases |
|---|---|
| Cargill Inc | 3.1M lbs |
| The Andersons Inc - Sioux City | 870.0K lbs |
| Valmont Coatings Inc DBA Siouxland Galvanizing Corp. | 57.1K lbs |
| Cargill Feed & Nutrition Sioux City | 11.0K lbs |
| Missouri Valley Steel Co | 10.9K lbs |
| US Dod Usaf Sioux City Ang Range | 2.4K lbs |
| Kent Nutrition Group Inc | 1.0K lbs |
| Wilson Trailer Co | 251 lbs |
| Sabre Industries | 186 lbs |
| Sioux City Foundry Co | 110 lbs |
Frequently Asked Questions
Is Sioux City, Iowa water safe to drink? ▼
How many water violations does Sioux City have? ▼
What contaminants were found in Sioux City water? ▼
How many water systems serve Sioux City? ▼
Where does Sioux City get its drinking water? ▼
Are there pollution sources near Sioux City? ▼
About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.
A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.