A84/100
SOUTH SIOUX CITY, CITY OF — Water Quality Report 2026
Serving 14,043 people · Nebraska
Water Source
GUP
County
—
System ID
NE3104309
Violations
1
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.80 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2000.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About SOUTH SIOUX CITY, CITY OF
Is SOUTH SIOUX CITY, CITY OF water safe to drink?
SOUTH SIOUX CITY, CITY OF water receives a grade of A (84/100), which is considered excellent. Out of 70 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SOUTH SIOUX CITY, CITY OF detected?
70 contaminants were tested in SOUTH SIOUX CITY, CITY OF's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does SOUTH SIOUX CITY, CITY OF have any EPA violations?
Yes, SOUTH SIOUX CITY, CITY OF has 1 EPA violation(s) on record, with the most recent in 2000. Violation types include MCL. 1 are health-based violations.
How many people does SOUTH SIOUX CITY, CITY OF serve?
SOUTH SIOUX CITY, CITY OF serves approximately 14,043 people, Nebraska. The system provides water to 1 community: South Sioux City.
What type of water does SOUTH SIOUX CITY, CITY OF provide?
SOUTH SIOUX CITY, CITY OF sources its water from gup. The utility's system ID is NE3104309.
How does SOUTH SIOUX CITY, CITY OF compare to other utilities in Nebraska?
SOUTH SIOUX CITY, CITY OF scores 84/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Nebraska state page for a full comparison of water systems.