Are you wondering if 1,2,3-TCP is affecting your household water in Missoula? Federal monitoring of the Mountain Water Company public system, which serves Missoula and surrounding areas, found no detections of 1,2,3-trichloropropane above the reporting level in groundwater sources. Even so, some homes experience challenges where existing equipment seems unable to keep pace with water quality demands.
Granular activated carbon contact time: why bed depth matters more for TCP than for taste
One common belief is that standard water treatment beds remove all chlorinated solvents equally well. The data from Missoula’s system shows 1,2,3-TCP is measured at extremely low concentrations or not detected at all, but the effectiveness of filtration equipment depends heavily on how long water contacts the filtering media. For 1,2,3-trichloropropane, the interaction time with granular activated carbon is more critical than for taste-affecting compounds. Higher bed depth in filtration media increases contact time, enhancing the filtering of this stubborn chlorinated solvent.
Why the reporting level for this solvent is thousands of times lower than for common metals
Another assumption is that all contaminants have similar detection thresholds. However, the federal monitoring program used a reporting level for 1,2,3-trichloropropane of 0.03 micrograms per liter (0.03 parts per billion), which is far lower than for most metals commonly found in drinking water. This reflects the potential concerns with this chlorinated solvent even at trace levels. Missoula’s recent sampling found zero detections above this very low threshold, although this is based on system-level data and not individual homes.
What questions a commercial or industrial operator adds that a household does not
Households often focus on whether their current water treatment can meet immediate needs, while commercial and industrial users may require detailed reports on contaminant variability, peak concentrations, and regulatory compliance. For residences in Missoula, the absence of detected 1,2,3-TCP in system monitoring suggests concerns are largely preventative or related to private wells. Larger facilities might need continuous monitoring and treatment strategies aligned with process water requirements.
What 'detected', 'median' and 'range' mean in the sampling record on this page
The Mountain Water Company’s unregulated contaminant monitoring results report 44 samples with no detections of 1,2,3-trichloropropane above the 0.03 micrograms per liter reporting level. 'Detected' means a measurement above this threshold, which was not recorded here. Median and range statistics describe the spread of results but are not applicable when all samples are below reporting limits. This information relates to the public water system overall and not individual tap water in homes.
How the documented treatment technology removes or neutralises the constituent
For households whose current equipment can't fully manage 1,2,3-trichloropropane concerns, upgrading to advanced filtration like the Fleck 1,2,3-TCP Filter can help. This technology uses optimized carbon filtration beds designed for prolonged contact time, specifically targeting chlorinated solvents such as TCP. It ships ready to configure, offering a practical solution to enhance existing water treatment setups by further reducing trace levels of this constituent.
To confirm if 1,2,3-trichloropropane is present in your household water and at what level, ordering a comprehensive water test from a certified laboratory is essential. A measurement against the federal reporting level (0.03 micrograms per liter) will inform whether an enhanced filtration device is warranted. This single test can settle questions about TCP presence and the need for additional treatment measures in Missoula homes.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-11-17. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Mountain Water Company (MT0000294), MT: 44 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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