The Sioux City Water Supply system, serving Woodbury County with surface water, has recorded five health-based EPA violations relating to bacteria among a total of seven violations. This information reflects system-wide monitoring, not individual household water quality.
What do 'detected', 'median', and 'range' indicate in the Sioux City Water System's bacteria sampling record?
Detected means that sampling equipment measured the presence of bacteria indicators in system-wide water samples at some points and times; it is not a direct measure of contamination severity or health risk for any single tap. Median is the middle value of all samples taken; it shows typical system water but not household-specific conditions. Range spans the lowest to highest measured values, illustrating variability across locations and times. Since these are aggregated figures, they represent the water system as a whole, not your home’s water.
What does a certified laboratory’s bacteria test report for my household water show, and how should I read it?
A certified lab tests your specific water sample for bacterial indicators such as total coliforms or E. coli, reporting presence or absence and concentration levels. This test reflects your household’s water quality at the sample time, unlike area-wide system data. Regular testing by a certified lab is the only way to determine if bacteria are in your water, since public system data cannot confirm household conditions.
Why are aesthetic secondary standards different from health-based limits when it comes to bacteria?
Aesthetic standards typically address taste, odor, or visual clarity but do not apply to bacteria. For bacteria, the EPA enforces health-based standards to prevent illness. The public water system record for Sioux City documents health-based violations related to bacteria, which are regulatory findings that the system must address. However, individual detections or aesthetic concerns in water do not equal a health violation.
How can I assess if a treatment solution matches my household’s daily water demand?
Choosing an effective treatment involves comparing the system's treatment capacity with your household’s daily water use. Estimating daily water demand considers the number of people, common usage patterns, and peak consumption times. The documented Autotrol Bacteria & Coliform Filter is designed to meet typical residential flow rates and volume demands, ensuring that treated water delivery matches household needs without sacrificing performance.
How does water quality at the tap change after using the Autotrol Bacteria & Coliform Filter?
Once the Autotrol System is in place and configured, it actively reduces bacteria and coliform levels in water delivered to your household taps. This treatment improves microbial safety by filtering out bacteria-associated particles, helping maintain compliance with health-based guidelines. The system operates consistently to provide treated water that relies on physical filtration rather than chemical additives, giving households control over microbiological water quality.
This page summarizes bacterial monitoring for the Sioux City Water Supply system serving Woodbury County as reported by the EPA’s public water system record. For specific household water quality information, a certified laboratory test is required. The complete public system record is available from the EPA’s data service.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for SIOUX CITY WATER SUPPLY (IA9778054), surface water supply, serving 85791 people: 5 health-based violations of 7 total; lead 90th percentile 0.002 mg/L
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