This week, Rockford families face a decision on selecting the right equipment to address perchlorate in their household water supply.
Reading a Certified Laboratory Test for Perchlorate in Your Home Water
A certified laboratory test measures perchlorate concentration in micrograms per liter (µg/L). The test reports the detected level or indicates if perchlorate is below the laboratory's reporting threshold. Understanding this report shows whether perchlorate is present and at what concentration, but it does not determine if your water is unsafe or in violation of any regulation. Only your own water test results apply to your home; regional data offers context but not a definitive assessment.
Distinguishing Perchlorate From Other Water Quality Concerns Commonly Confused With It
Perchlorate is different from taste-and-odor issues or mineral hardness problems often associated with groundwater. Unlike metals or organic compounds, perchlorate is an ion that primarily raises concerns due to its potential to affect thyroid function at high levels, but Rockford's public water system has no recorded health-based exceedances. Perchlorate should not be confused with nitrates, chlorides, or other common constituents found in groundwater.
Maintenance Rhythm of the C-Series System When Treating Perchlorate
The C-Series Perchlorate Filter requires a periodic routine to maintain optimal performance. This includes monitoring system indicators and replacing filter media as recommended by the manufacturer’s guidance. The maintenance frequency depends on water usage, perchlorate levels in household water, and system capacity. Regular attention helps sustain treatment effectiveness without service interruptions.
How the C-Series Technology Addresses Perchlorate in Household Water
The C-Series System uses a selective filtration process documented to reduce perchlorate to levels typically below detection. This technology is designed to target and remove perchlorate ions, ensuring the treated water meets homeowner expectations. It ships ready to configure and can be adapted to existing household water setups to manage perchlorate exposure efficiently.
What Public Water System Records Establish Compared to Private Well Testing
EPA records for Rockford’s public water system show no perchlorate detected above 4.0 µg/L in 59 samples collected between 2003 and 2005. This data reflects the regional groundwater used by the system, serving over 147,000 residents through more than 51,000 connections. However, these results do not guarantee the perchlorate levels in any individual household’s water. Private well users or those concerned about specific water quality should conduct independent testing at certified laboratories to determine exact perchlorate concentrations.
In summary, EPA data for Rockford (IL2010300) demonstrates no perchlorate detections above reporting levels in the public water system. This information comes from a federal survey and represents system-wide sampling rather than individual household results. For further details, see the EPA’s Unregulated Contaminant Monitoring Rule public water system records.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2003-12-02. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR1 monitoring (2001-2005) for ROCKFORD (IL2010300), IL: 59 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level

