When you receive a laboratory test report for 1,2,3-trichloropropane (1,2,3-TCP) in your water, it typically lists concentrations in micrograms per liter or parts per billion. These figures indicate the measured presence of this chlorinated solvent, but understanding what they mean requires context about regional water quality data and established health standards.
How California's 5 ng/L State Limit Compares with the Absence of a Federal MCL
California has set a state notification level for 1,2,3-TCP at 5 nanograms per liter (ng/L), equivalent to 0.005 micrograms per liter, reflecting a precautionary approach to this constituent. However, there is currently no federal Maximum Contaminant Level (MCL) established for 1,2,3-trichloropropane by the Environmental Protection Agency. This means that while the federal system monitors and reports occurrences, it does not regulate this constituent with a legally enforceable limit at the national level.
For residents of the Wasilla Water System in Matanuska-Susitna Borough, EPA monitoring data collected from 2013 to 2015 shows no detection of 1,2,3-TCP above the reporting level of 0.03 micrograms per liter, indicating the constituent was not measurable in those samples. This federal occurrence survey reflects the water system's overall condition and is not a substitute for testing your own household water.
Why 1,2,3-Trichloropropane Resists Air Stripping and What That Means for Treatment Choice
1,2,3-TCP is a chlorinated solvent characterized by low volatility, meaning it does not readily evaporate into air. Because of this chemical property, air stripping—a process that removes contaminants by transferring them from water to air—is generally ineffective against 1,2,3-trichloropropane. This resistance impacts treatment decisions, guiding homeowners to consider alternative technologies better suited for addressing chlorinated solvents.
How the Documented Treatment Technology Removes or Neutralizes the Constituent
Among available technologies, the Pentair 1,2,3-TCP Filter uses a specialized configuration to reduce the presence of this chlorinated solvent from water intended for household use. This system employs advanced filtration media designed to adsorb 1,2,3-trichloropropane molecules, effectively capturing the constituent as water passes through. The filter ships ready to configure for direct household application and does not rely on air stripping or ozone treatment methods.
How a Soil Fumigant Impurity From the 1950s–1980s Reached Deep Groundwater Decades Later
1,2,3-TCP originally appeared as an impurity in soil fumigants used primarily from the 1950s through the 1980s. These fumigants were applied for agricultural pest control, often in areas where soil permeability allowed the chlorinated solvent to migrate downward. Over decades, 1,2,3-trichloropropane slowly moved through soil layers, eventually reaching deep groundwater aquifers. This historical usage explains detections of TCP in groundwater sources long after the fumigants were phased out.
How the Constituent Enters Groundwater or the Distribution System in This Region
In Matanuska-Susitna Borough, groundwater supplies the Wasilla Water System. The 1,2,3-TCP in such groundwater likely originates from past use of soil fumigants in the region or nearby areas. Once present in groundwater, TCP can enter the distribution system through well water drawn for public supply. The EPA’s monitoring from 2013 to 2015 showed no detections above the reporting threshold in this system, but individual well water conditions can differ, so testing your home's water is necessary for certainty.
This summary reflects the federal EPA’s public water system record for Wasilla Water System, which serves nearly 18,500 residents through over 1,800 connections. To understand your own water's condition, consider laboratory analysis for 1,2,3-trichloropropane specifically. The Pentair 1,2,3-TCP Filter offers a documented option to address this constituent and ships ready to configure for residential use. For detailed official data, the EPA’s Safe Drinking Water Information System provides access to the water system’s monitoring results and status.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2013-12-16. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Wasilla Water System (AK2224646), AK: 6 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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