Sioux City Water Supply
Drinking water quality, contact, and Consumer Confidence Report
Serving 1 city in IA · PWSID IA9778054
Sioux City Water Supply serves 85,797 people. 2 EPA MCL violations on record — full violation history below.
- People served
- 85,797
- Last EPA sample
- 2025-05-14
- PFAS
- Detected (2 compounds)
- Active violations
- 2
Data sources: EPA SDWIS, Sioux City Water Supply's published Consumer Confidence Report, Iowa Department of Environmental Protection.
This page summarizes publicly available EPA and CCR records. For health decisions about your water, consult your utility or a licensed professional.
Sioux City Water Supply Service Area
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This map shows the approximate service area for Sioux City Water Supply. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
Sioux City Water Supply Water Quality Grade
Significant water quality issues. Filter recommended.
Grade is calculated based on contaminants exceeding health guidelines (MCLG) and EPA Maximum Contaminant Level violations. A = Excellent (90-100), B = Good (80-89), C = Fair (70-79), D = Poor (60-69), F = Failing (<60).
Is Sioux City Water Supply Water Safe to Drink?
Sioux City Water Supply has reported 7 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. The utility has 2 MCL violations on record. We recommend reviewing individual city reports below for specific water quality details.
This utility serves 85,797 people across 1 city in IA. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
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Learn more about the contaminants detected in Sioux City Water Supply:
Sioux City Water Supply Service Area
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Sioux City Water Supply Contact & Information
Phone
Mailing Address
For hours of operation and emergency contact information, please visit the official utility website or call the main phone number.
B2B Contact Data
B2B Contact Data Available
Contacts for Sioux City Water Supply
| Name | Title | Phone | |
|---|---|---|---|
| J████ S████ | Water Treatment Supervisor | (555) ███-████ | j████@city████.gov |
| M████ J██████ | Utility Director | (555) ███-████ | m████@water████.org |
Water Sources & Treatment
Water Sources
Treatment Methods
Disinfectant Used
chlorine, filtration, hypochlorite, uv light
Sioux City Water Supply Consumer Confidence Report
A Consumer Confidence Report (CCR) is the EPA-mandated annual water-quality report every community water system must publish by July 1 each year (Safe Drinking Water Act §1414(c)(4)). It summarizes contaminants tested, MCL and MCLG comparisons, and any system violations from the prior calendar year.
A current CCR for Sioux City Water Supply has not been published or validated on TapWaterData yet.
Residents: contact the utility directly using the phone number above, or check the EPA’s national CCR portal. Reports are typically distributed by mail or posted on the utility’s official website.
EPA Violations
2 Maximum Contaminant Level Violations
This utility has recorded MCL violations, indicating contaminant levels exceeded federal legal limits. These violations are aggregated across all cities served.
Check individual city reports for specific violation details and current status.
Concerned about what's in your water?
You're viewing 7 contaminants above health-based guidelines here. Your own tap water can differ — upload your test (PDF or a photo) and we'll email a full plain-English reading of every number, free.
Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.
Upload my testRecommended Water Filters for Sioux City Water Supply
Based on water quality data from cities served by Sioux City Water Supply, we recommend NSF-certified filters that can remove contaminants above health guidelines.
Filter guides for the contaminants detected here:
Frequently Asked Questions about Sioux City Water Supply
Is Sioux City Water Supply water safe to drink?
Does Sioux City Water Supply have PFAS in its water?
How do I pay my Sioux City Water Supply water bill?
How many people does Sioux City Water Supply serve?
What cities does Sioux City Water Supply serve?
Does Sioux City Water Supply have any EPA violations?
What is Sioux City Water Supply's phone number?
Where can I find Sioux City Water Supply's Consumer Confidence Report?
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How we built this page
Water-quality and contact data on this page comes from public federal and state records. We update each utility's record whenever its underlying source publishes new data — typically within days of an EPA SDWIS refresh.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: Sioux City Water Supply's most recent published Consumer Confidence Report (CCR), where available.
- Service area & contact: EPA SDWIS plus the Iowa Department of Environmental Protection / Drinking Water program.
Spotted a data issue? Use the Spotted something off? link at the bottom of the page — corrections feed back into the next data refresh. Learn more about TapWaterData.
Are you Sioux City Water Supply? Publish your 2027 CCR
TapWaterData runs a free CCR publishing service for community water systems. Claim this listing to publish your Consumer Confidence Report here — it inherits this page's search authority and reaches every customer who Googles Sioux City Water Supply.
- EPA-compliant distribution. Satisfies the 2027 Revised CCR Rule direct-URL requirement with an auditable archive.
- Publish once a year. Agent-assisted workflow; no login setup for small systems.
- Inherits this page's reach. Your published CCR appears directly on the page customers already find on Google.
Free for operators. No card required. Typical setup: 5 minutes.
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