Understanding 1,2,3-TCP in Brookfield Waukesha Water Records and Local Standards
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Whole House 1,2,3-TCP Reduction Water Filter System - Trichloropropane Removal
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Belief: Brookfield Water Contains Detectable Levels of 1,2,3-TCP
Government sampling from the Brookfield Water Utility, serving over 29,000 people via groundwater sources, found zero detections of 1,2,3-trichloropropane (TCP) above the reporting threshold of 0.03 micrograms per liter (µg/L) or parts per billion (ppb). This means that during the 2014-2015 monitoring period, no measurable amount of this chlorinated solvent was found in their public water supply. This sampling is from the system as a whole and does not indicate the condition of any individual home or well.
Belief: Federal Maximum Contaminant Levels and California’s 5 ng/L Standard Are Equivalent Benchmarks
Unlike many other contaminants, there currently is no federal Maximum Contaminant Level (MCL) set for 1,2,3-TCP, meaning the EPA has not established a legal health-based limit for this chemical in drinking water. By contrast, California has adopted a public health goal of 0.005 micrograms per liter (5 nanograms per liter), which is much lower than the federal reporting level used in Brookfield monitoring. This state-level guideline reflects a precautionary approach and is not a requirement for federal compliance. Understanding these different benchmarks helps clarify why detection above a very low state limit does not imply a violation or immediate health risk under federal regulations.
Belief: The Presence of TCP in Water Is a New Problem Caused by Recent Pollution
The chlorinated solvent 1,2,3-trichloropropane was historically used as a soil fumigant and industrial chemical, especially from the 1950s through the 1980s. Because it can move slowly through soil and reach groundwater over long periods, detections in groundwater, where they occur, represent contamination from past decades rather than recent pollution events. This explains why some areas may show low levels in groundwater without current sources contributing to ongoing contamination.
Belief: All Samples from a Water System Represent Every Well or Depth Equally
The detection results represent 34 samples taken from Brookfield’s public water system’s groundwater sources over several months. The samples reflect a range of well depths and locations supplying the system but do not cover every individual well or the full depth range possible. Variations in sample depth or specific well construction can influence local concentrations of constituents like TCP. Therefore, while system-wide data gives an overview of water quality, it cannot predict the presence or absence of TCP in a single household’s water without direct testing.
Belief: A Certified Lab Test Alone Fully Explains Your Water’s 1,2,3-TCP Status
Testing water for 1,2,3-trichloropropane involves collecting a properly preserved sample and sending it to a certified laboratory capable of analyzing at or below the 0.03 µg/L reporting level. Laboratory reports provide measured concentrations in micrograms per liter or parts per billion, comparing them to reporting thresholds but not necessarily to health-based limits, as none federally exist. Interpreting these results requires understanding local water authorities’ data, possible sources of contamination, and what the measurements mean for health or aesthetics. A single test cannot detail long-term fluctuations or indicate the need for treatment without considering broader system data.
Conclusion: What Brookfield’s Public Water Data Should Not Lead You to Assume
Residents should not conclude from the available data that their well or tap water is necessarily free of 1,2,3-TCP or any other specific compound without testing their own water. Similarly, the absence of detections above 0.03 µg/L in system monitoring does not imply a strict federal safety violation or contamination. For those concerned about 1,2,3-trichloropropane, options like the Fleck 1,2,3-TCP Filter ship ready to configure and have documented performance reducing this chlorinated solvent from water supplies. Responsible water quality management starts with understanding monitoring data, recognizing its scope and limits, and combining system information with certified testing tailored to individual circumstances.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-03-18. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Brookfield Water Utility (WI2680253), WI: 34 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level