Sioux Falls Water Quality
South Dakota
The tap water in Sioux Falls, South Dakota is served by 8 EPA-regulated water systems covering approximately 223,381 people. 10 health-based violations are on record, most recently for 0400 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in Sioux Falls, South Dakota is delivered through 8 EPA-regulated community water systems serving an estimated 223,381 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 Falls shows 10 total violations across all 8 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 0400, 0700. 17 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 South Dakota 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 FALLS | 216,462 | 1 | Health |
| LINCOLN COUNTY RURAL WATER SYSTEM | 5,965 | 0 | Clean |
| PINE LAKE HILLS | 320 | 3 | Health |
| VALLEY VIEW ESTATES | 230 | 2 | Health |
| MORROW CROSSING MHC | 150 | 0 | Clean |
| SKYLINE HEIGHTS | 110 | 1 | Health |
| PROSPECT MANOR MHC | 94 | 0 | Clean |
| BEULAH LAND WATER | 50 | 3 | Health |
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 |
|---|---|
| 0400 | 2025-07-07 |
| 0700 | 2023-03-27 |
| 0700 | 2021-12-24 |
| 0400 | 2021-08-15 |
| 0700 | 2017-10-05 |
| 0400 | 2017-02-01 |
| 0400 | 2012-02-01 |
| 0400 | 2010-07-01 |
| 0400 | 2009-12-08 |
| 0400 | 2007-07-16 |
TRI Facilities in Sioux Falls
| Facility | Total Releases |
|---|---|
| Smithfield Packaged Meats Corp - Sioux Falls | 21.3M lbs |
| Masterbrand Cabinets LLC | 421.0K lbs |
| Design Tanks LLC | 247.4K lbs |
| Knife River-Madison Street | 1.7K lbs |
| Knife River-Rice Street | 879 lbs |
| Diamond Mowers Inc. | 423 lbs |
| Graco Inc Sioux Falls | 162 lbs |
| Hansen Manufacturing DBA Hi-Roller Conveyors | 92 lbs |
| US Dod Usaf Joe Foss Field Ang Sd | 60 lbs |
| Hancock Concrete Products | 21 lbs |
Frequently Asked Questions
Is Sioux Falls, South Dakota water safe to drink? ▼
How many water violations does Sioux Falls have? ▼
What contaminants were found in Sioux Falls water? ▼
How many water systems serve Sioux Falls? ▼
Where does Sioux Falls get its drinking water? ▼
Are there pollution sources near Sioux Falls? ▼
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.