SIOUX CITY WATER SUPPLY Water Quality Report
Population
85,791
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 8
violations recorded
C
Fair
Safety Grade
8 violations in the past 5 years, including 10 health-based
System Details
- PWSID
- IA9778054
- Population Served
- 85,791
- Water Source
- Surface Water
- Owner
- Local Government
- State
- Iowa
- EPA Region
- 7
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 2257 | ✕ Health-Based | 9 |
| Haloacetic Acids (HAA5) | ⚠ Monitoring/Reporting | 4 |
| Total Trihalomethanes (TTHMs) | ✕ Health-Based | 8 |
Violation History
2024
8
2019
4
2017
3
2016
6
Total violations on record: 21
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
How does this compare?
This systemNational average
Grade C
Avg: B-C
21violations total
75% of national average
National avg: ~28 per system
🏙️ This is a large system — serving 13× more people than the national average.