Sioux City, Iowa Water Quality Report
Water quality data for 2 water systems serving 85,824 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 240.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 2400% | Above guideline |
| PFBA | 0.009 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.021 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHpA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.033 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.035 | 0.010 ug/L | 0.001 ug/L(EWG) | 350% | Above limit |
| PFOA | 0.006 | 0.004 ug/L | 0.090 ug/L(EWG) | 150% | Above limit |
| PFOS | 0.004 | 0.004 ug/L | 0.300 ug/L(EWG) | 108% | Above limit |
| PFPeA | 0.022 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeS | 0.014 | No federal limit | — | — | No federal limit |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (12)
Violation
Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
Resolved Violations (121)
27
May 1, 2024 — May 31, 2024
27
May 1, 2024 — May 31, 2024
27
May 1, 2024 — May 31, 2024
27
May 1, 2024 — May 31, 2024
27
May 1, 2024 — May 31, 2024
+ 116 more resolved violations
Frequently Asked Questions
Is Sioux City tap water safe to drink?
Sioux City's water has 3 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Sioux City tap water?
10 contaminants have been detected in Sioux City's water supply across 2 water systems. See the full contaminant table above for details.
How can I improve my water quality in Sioux City?
Install a water filter rated for the specific contaminants found in Sioux City's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Sioux City have any water quality violations?
Yes, Sioux City currently has 12 active violations. See the violations section above for details.