1. What a Laboratory Test Report for 1,2,3-Trichloropropane Actually Lists
When you receive a water test report focused on 1,2,3-trichloropropane (TCP), it will show concentration values in micrograms per liter (µg/L) or parts per billion (ppb). This quantifies the amount of TCP detected in your sample. For residents in Bozeman, MT, government data for the City of Bozeman public water system show no detections above the reporting level of 0.03 µg/L for 1,2,3-TCP collected between 2013 and 2015. Such a result means the substance was measured at levels below that threshold or not detected, but it does not reflect conditions in any single home’s water without a specific test.
2. The Agricultural Land-Use History of Gallatin County and How It Maps Onto 1,2,3-TCP Detections
Gallatin County has a history of agricultural activities, including periods when soil fumigants containing TCP precursors were applied. 1,2,3-trichloropropane is a byproduct sometimes associated with older soil fumigant formulations used in the mid 20th century. Residual TCP can migrate through soil and enter groundwater over decades. In Bozeman’s public surface water sources sampled by the EPA, no detectable TCP above reporting limits was found, but this regional history explains why monitoring occurs and what the potential sources are in groundwater or nearby areas.
3. Comparing Gallatin’s 1,2,3-TCP Record With Neighboring Regions Without Overreading the Data
Nearby counties may show varying results for 1,2,3-TCP due to differences in land use, water source types, and hydrogeology. It is important not to interpret a detection or non-detection in one county as definitive for your own well or tap water. The City of Bozeman’s 2013-2015 data set, for example, shows zero detections above the 0.03 µg/L reporting level, which differs from some adjacent regions where sporadic detections might occur. Each area’s monitoring data reflect system-wide conditions rather than individual household plumbing.
4. Influence of Sample Depth, Well Depth, and Water Source Type on Expected TCP Levels
Public water systems like Bozeman’s rely primarily on surface water, which tends to have different contaminant profiles than groundwater or private wells. TCP concentrations can vary with depth due to how contaminants migrate and degrade. Deep wells might show different TCP levels compared to shallow sources. Since Bozeman uses surface water, lower TCP levels are consistent with what was measured. Private well owners should consider testing local groundwater directly to know their individual water quality rather than relying solely on public system records.
5. How a Byproduct from Mid-20th Century Soil Fumigants Spreads Slowly Through the Environment
1,2,3-trichloropropane originates as an impurity in soil fumigants used mainly between the 1950s and 1980s. Its persistence and slow movement through soil mean it can reach groundwater long after application. This delayed appearance is why monitoring continues decades later, even for surface water sources. In Bozeman’s system, EPA monitoring found no TCP above reporting levels, but the chemical’s environmental behavior warrants vigilance and testing for handlers concerned about private water supplies.
Closing: The One Test That Matters Most to Homeowners Concerned About 1,2,3-Trichloropropane
If you want to know your household’s actual exposure to 1,2,3-TCP, the key step is ordering a laboratory test that reports water 1,2,3-trichloropropane concentration. A result below 0.03 µg/L (30 parts per trillion) aligns with Bozeman’s public water record, providing reassurance. Should the test show measurable TCP, the Autotrol 1,2,3-TCP Filter is a documented option that ships ready to configure and addresses this chlorinated solvent effectively for residential water treatment needs.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-08-20. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for City of Bozeman (MT0000161), MT: 6 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level