What do 'detected,' 'median,' and 'range' mean in Rockford's chloramine sampling record?
Government water quality records for Rockford's public water system show measurements of various water constituents including chloramine. The term 'detected' means chloramine has been measured in samples from this system. 'Median' is the middle value of the detected concentrations reported, and 'range' indicates the spread between the lowest and highest measured values during sampling. These measurements describe the system’s water as a whole, not any individual home’s water. They provide a general idea but cannot specify your home's exact chloramine levels.
How does chloramine enter groundwater or the distribution system in this region?
Rockford’s water supply comes from groundwater sources. Chloramine is commonly introduced during water treatment as a disinfectant to maintain water quality throughout the distribution system. It forms when chlorine is combined with ammonia to create a longer-lasting disinfectant than chlorine alone. This treatment step is part of the multiple processes applied to ensure microbial safety for the 147,051 people served in Winnebago County's Rockford system.
How to read the median and range in the Rockford water system record as a homeowner
The Rockford water system data does not list chloramine directly but indicates a complex treatment process including various steps coded 121, 143, 149, and others. These codes correspond to recognized treatments that may involve chloramine application. While no health-based violations are recorded, the presence of chloramine is routine and controlled. Homeowners should recognize that detected chloramine levels in this system are within regulated standards and do not signify unsafe water by the EPA record.
How Fleck Chloramine (City Water) Filter removes or neutralizes chloramine
The Fleck Chloramine (City Water) Filter uses specialized filtration media and technology designed to reduce chloramine and related byproducts effectively. This treatment technology is shipped ready to configure for residential use and addresses chloramine that standard equipment may not remove after failure. The system operates to neutralize chloramine's chemical structure, improving water taste, odor, and potential staining effects commonly associated with chloramine presence.
What changes for a large household, second home, or seasonal property in Winnebago County?
Larger households or multiple properties may experience increased chloramine exposure based on water volume usage and storage patterns. Seasonal homes might have water sitting in plumbing longer, leading to chloramine decay and altered water quality experience. Fleck Chloramine (City Water) Filter's design can accommodate varying household sizes and usage patterns by adjusting filter media capacity accordingly, ensuring consistent chloramine reduction across different household scenarios.
How to judge treatment capacity against your household or facility's daily water demand
Determining the appropriate size and capacity for chloramine treatment depends on your daily water use and peak consumption times. Households should estimate average daily gallons used and consider that chloramine levels vary throughout the distribution cycle. Fleck Chloramine (City Water) Filter specifications provide guidance on configuring treatment to match these demands, maintaining effective chloramine reduction without frequent filter media replacement.
What you should NOT conclude from Rockford's public water system data
The presence of chloramine detected in Rockford’s water system according to government records is not a health violation and does not mean your household’s water is unsafe. Detection indicates measurement of chloramine as part of normal water treatment and distribution. Individual water quality can only be confirmed by testing your home's water directly. The system’s zero health-based violations record assures compliance with EPA standards, so chloramine levels in the public supply are managed for safety and effectiveness.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2026-06-30. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for ROCKFORD (IL2010300), groundwater supply, serving 147051 people: 0 health-based violations of 14 total; lead 90th percentile 0.0073 mg/L
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