Skip to main content
WaterSafeCheck

Sioux Falls, SD Tap Water Quality

Water safety reports for all 20 ZIP codes in Sioux Falls, South Dakota

Average Score

61/100

Health Violations

20

ZIP Codes

20

High Lead Risk

3

of 20 ZIP codes

C

About Tap Water in Sioux Falls, SD

Water quality in Sioux Falls, SD is currently rated with a moderate C grade (average score: 61/100 across 20 ZIP codes). This rating indicates that while the water provided by Sioux Falls is treated and regulated, there have been notable compliance issues or contaminant detections recently. Residents should stay informed about the specific challenges affecting their local supply.

The accumulation of 20 health-based violations over the past 5 years highlights systemic challenges within Sioux Falls's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by South Dakota Department of Agriculture and Natural Resources. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 3 out of 20 ZIP codes in Sioux Falls are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.

⚠ Lead Risk Alert: Some ZIP codes in Sioux Falls are rated High or Very High for lead exposure risk based on EPA data. Search your specific ZIP code for a detailed lead level report.

Health-Based Contaminant Violations in Sioux Falls

EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Sioux Falls water systems over the past 5 years.

Chlorine residual

Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.

Water Quality by ZIP Code — Sioux Falls, SD

Click any ZIP code for the full water quality report

C
57101

Sioux Falls, SD

Score: 66/1001 violation
C
57110

Sioux Falls, SD

Score: 66/1001 violation
C
57103

Sioux Falls, SD

Score: 61/1001 violation
C
57106

Sioux Falls, SD

Score: 61/1001 violation
C
57107

Sioux Falls, SD

Score: 61/1001 violation
C
57108

Sioux Falls, SD

Score: 61/1001 violation
C
57109

Sioux Falls, SD

Score: 61/1001 violation
C
57117

Sioux Falls, SD

Score: 61/1001 violation
C
57118

Sioux Falls, SD

Score: 61/1001 violation
C
57186

Sioux Falls, SD

Score: 61/1001 violation
C
57189

Sioux Falls, SD

Score: 61/1001 violation
C
57192

Sioux Falls, SD

Score: 61/1001 violation
C
57193

Sioux Falls, SD

Score: 61/1001 violation
C
57194

Sioux Falls, SD

Score: 61/1001 violation
C
57195

Sioux Falls, SD

Score: 61/1001 violation
C
57196

Sioux Falls, SD

Score: 61/1001 violation
C
57197

Sioux Falls, SD

Score: 61/1001 violation
C
57198

Sioux Falls, SD

Score: 61/1001 violation
C
57104

Sioux Falls, SD

Score: 56/1001 violation
C
57105

Sioux Falls, SD

Score: 56/1001 violation

Frequently Asked Questions — Sioux Falls Water Quality

Is tap water safe to drink in Sioux Falls, SD?+
Tap water in Sioux Falls has a grade of C, indicating compliance concerns in recent years. Families with young children or pregnant women should consider using a certified NSF/ANSI 53 water filter for drinking and cooking.
What is the water quality score for Sioux Falls?+
The average water quality score across 20 ZIP codes in Sioux Falls, SD is 61/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Sioux Falls have lead in its tap water?+
3 out of 20 ZIP codes in Sioux Falls are rated High or Very High for lead exposure risk. Older homes built before 1986 may have lead service lines or plumbing fixtures. Residents should run their tap for 30 seconds before use and consider a certified NSF/ANSI 53 lead filter.
How do I get the water quality report for Sioux Falls?+
Each ZIP code in Sioux Falls has a full water quality report on this site — click any ZIP code below. You can also get the annual Consumer Confidence Report (CCR) from your local water utility. The CCR is required to be published every year by July 1 and contains actual contaminant measurements and violation history.
Where does Sioux Falls's tap water come from?+
Tap water in Sioux Falls, SD primarily comes from surface water. Surface water systems treat water from rivers, lakes, or reservoirs using filtration, sedimentation, and disinfection before it reaches your tap.

Looking for water quality in other cities in South Dakota?

View All Cities in South Dakota →