The West Bend Waterworks system serving Washington County, Wisconsin, draws from groundwater sources to provide water to over 31,000 people through nearly 12,000 connections. According to U.S. Environmental Protection Agency (EPA) public water system records, perchlorate was tested between 2002 and 2005 as part of a federal unregulated contaminant monitoring rule. During that time, no perchlorate was detected above the reporting level of 4.0 micrograms per liter in any of the 18 samples from this system. This data informs community-wide water quality, but each home’s water may vary, and personal testing is essential to understand your specific circumstances.
If you are confusing perchlorate with other water quality issues common in the area
Perchlorate is different from other water concerns like hardness or bacterial contamination. It is a chemical that can affect thyroid function when present at significant levels, but the EPA has not set a federal maximum contaminant level (MCL) for perchlorate. This distinguishes it from regulated contaminants where legal limits exist. The monitoring results for West Bend show no measurements above the method reporting limit, which means no unusually elevated perchlorate was found during that period. It is important to distinguish perchlorate presence from aesthetic issues such as taste or odor and from microbial or heavy metal problems which require other types of treatment.
If you are wondering how perchlorate levels change over time in your water system
The 18 samples from 2002 to 2005 provide a snapshot rather than continuous tracking. This five-year sampling period revealed no perchlorate detections above 4.0 µg/L, but conditions can vary with source water changes, environmental factors, or other influences. Long-term or seasonal variation is not documented in more recent publicly available data for this system, so ongoing testing or consultation with local water experts can help identify if your household water quality changes over time.
If you want to understand what information you should have before assessing perchlorate treatment needs
Before deciding on additional treatment, note your household’s current water capacity and treatment equipment performance. Record your daily water use, any known water quality test results specific to your home, and the effectiveness of your existing equipment. This baseline helps determine if your current system meets your water use demands regarding perchlorate reduction. Since the West Bend system data does not indicate perchlorate detections above the reporting threshold, confirm your own water analysis to identify whether further treatment like the Pentair Perchlorate Filter is warranted.
If you wonder how many samples and sources support the perchlorate data for West Bend, and what a limited data set implies
Data comes from 18 samples collected over several months from January to July 2002. These samples cover a public water system serving a large population but reflect just one monitoring period. The limited number of samples means the data provides an overview rather than complete characterization of perchlorate presence over time or throughout every distribution point. A small sample count suggests that while no perchlorate was detected above the reporting level at that time, intermittent or localized occurrences could exist undetected. Homeowners should consider additional water testing tailored to their location and usage.
If you want to know which parts of your household water use may first reveal perchlorate issues
Perchlorate dissolves uniformly in water, so appliances that use unfiltered water—such as ice makers, drinking fountains, or water dispensers—may be the first where subtle water quality differences show. Because existing equipment in your home may have limited perchlorate reduction capacity, frequent high usage or system strain might reduce effectiveness. Monitoring these fixtures for changes in water taste or performance and comparing with test results helps pinpoint whether perchlorate is affecting your water supply.
When household water treatment must address perchlorate at levels indicated by careful testing, the Pentair Perchlorate Filter ships ready to configure and can provide targeted removal. Matching treatment capacity to your measured water demand ensures adequate performance, helping households maintain control over perchlorate concerns beyond what existing equipment manages.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2002-07-23. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR1 monitoring (2001-2005) for WEST BEND WATERWORKS (WI2670120), WI: 18 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level