Sioux City
Is Sioux City tap water safe to drink?
Generally acceptable, but review local hotspots — score 68/100. This report aggregates EPA drinking water data across 0 local systems in Sioux City. We found 0 total violations (0 unresolved).
Real-Time Environment
Live: 02:30 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Sioux City.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Sioux City?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Filter or no filter for Sioux City water? Here's what the data says.
Baby Formula Safety
What new parents in Sioux City should know about tap water safety.
Homebuyer's Perspective
Water quality is easy to overlook when evaluating a move to Sioux City, but it can affect plumbing longevity and appliance lifespan. With a score of 68/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.
Health & Family Safety
Current records show no major contaminant spikes, making Sioux City a preferred choice for health-conscious families.
View Health Risk Glossary →Compliance Record for Sioux City
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Sioux City.
Frequently Asked Questions
Is Sioux City tap water safe to drink?
Generally acceptable, but review local hotspots — score 68/100.
How many water systems serve Sioux City?
Sioux City is served by 0 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Sioux City?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Sioux City.
What is the water quality score for Sioux City?
The water quality score for Sioux City is 68 out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in Sioux City?
Current contaminant data for Sioux City is being updated. Check back soon or search your specific address for the latest results.
Sioux City Water Quality Summary
Sioux City, IA receives a water quality score of 68/100 (Grade C) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
Sioux City's water quality is near the national average. While most systems meet EPA standards, some violations have been recorded. Residents may wish to review their specific water system's report for contaminant details.
Sioux City's score of 68 is 5 points below the Iowa state average of 73, and below the nationwide average of roughly 78/100 across all U.S. states.
In Sioux City, Iowa, a single municipal water system serves this mid-size city amidst a Midwestern agricultural landscape dominated by intensive row-crop farming and livestock production. This surrounding environment leaves local groundwater particularly vulnerable to nitrate contamination, requiring constant vigilance to maintain water quality. For prospective homebuyers and current residents, the city's middle-of-the-road water quality evaluations reflect these regional environmental pressures on their everyday tap water.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Iowa water quality rankings report →
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Water Systems Serving Sioux City (0)
Water system data coming soon for Sioux City.
Check Your Specific Address
Water quality can vary by neighborhood in Sioux City.
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