Data source: EPA SDWIS Last verified: 2026-06-03

Water quality varies significantly across Sioux Falls, SD. We analyzed 20 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.

City Overview: Grade C (61/100)

Grade	Neighborhoods	%
A	0	0%
B	0	0%
C	20	100%
D	0	0%
F	0	0%

Neighborhood Rankings

Every ZIP code in Sioux Falls ranked by Home Safety Score:

Rank	ZIP Code	Score	Grade	Violations	Lead Risk
1	57101	66	C	2	0.0030 mg/L
2	57110	66	C	2	0.0030 mg/L
3	57103	61	C	2	0.0030 mg/L
4	57106	61	C	2	0.0030 mg/L
5	57107	61	C	2	0.0030 mg/L
6	57108	61	C	2	0.0030 mg/L
7	57109	61	C	2	0.0030 mg/L
8	57117	61	C	2	0.0030 mg/L
9	57118	61	C	2	0.0030 mg/L
10	57186	61	C	2	0.0030 mg/L
11	57189	61	C	2	0.0030 mg/L
12	57192	61	C	2	0.0030 mg/L
13	57193	61	C	2	0.0030 mg/L
14	57194	61	C	2	0.0030 mg/L
15	57195	61	C	2	0.0030 mg/L
16	57196	61	C	2	0.0030 mg/L
17	57197	61	C	2	0.0030 mg/L
18	57198	61	C	2	0.0030 mg/L
19	57104	56	C	2	0.0030 mg/L
20	57105	56	C	2	0.0030 mg/L

How Neighborhoods Compare

Each ZIP code compared to county and state averages:

• 17 neighborhoods score better than county average
• 3 neighborhoods score worse than county average

EPA Violations

• 40 total violations across Sioux Falls
• 20 health-based violations
• 20 of 20 ZIP codes have violations
• 0 ZIP codes exceed EPA lead action level

Top Contaminants

Contaminant	Violations	ZIPs
Revised Total Coliform Rule	20	20
Chlorine residual	20	20

Frequently Asked Questions

What is the safest neighborhood in Sioux Falls?

ZIP code 57101 has the highest safety score in Sioux Falls at 66/100 (grade C). Check the full report for details.

Is Sioux Falls water safe to drink?

Sioux Falls has an average water safety score of 61/100 (C). Water quality varies by neighborhood — no ZIP codes currently exceed EPA lead limits. Always check your specific ZIP code.

Related Pages

• Sioux Falls, SD city page
• South Dakota state rankings
• All South Dakota alerts

Data Sources

• EPA SDWIS
• U.S. Census Bureau

Updated daily.