1,2,3-TCP in Canyon County Water: Understanding Reporting Levels and Treatment Options
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Whole House 1,2,3-TCP Reduction Water Filter System - Trichloropropane Removal
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What does the presence of 1,2,3-TCP in Canyon County water mean for a household whose current equipment is insufficient? Canyon County's public water system for City of Caldwell provides water sourced from groundwater and has detected no 1,2,3-TCP above reporting levels, yet some households find their treatment needs evolving.
Why the Reporting Level for This Chlorinated Solvent Is Thousands of Times Lower than for Common Metals
Difference in Reporting Thresholds
The Environmental Protection Agency (EPA) uses highly sensitive methods to detect 1,2,3-trichloropropane (TCP), setting a reporting level at 0.03 micrograms per liter (0.03 parts per billion). This level is thousands of times lower than those used for common metals, reflecting the technical challenges of measuring trace organic solvents rather than indicating a violation or health risk.
What a Reporting Level Signifies
A detection above this threshold simply means that the compound is measurable with EPA’s monitoring tools; it is not a safety limit or legal maximum contaminant level (MCL). For the City of Caldwell system, no detections exceeded this reporting level in 26 samples collected between late 2014 and mid-2015.
How a Soil Fumigant Impurity from the 1950s–1980s Reached Deep Groundwater Decades Later
Historical Use of 1,2,3-TCP
1,2,3-TCP was historically found as an impurity in soil fumigants used in agriculture during the mid-20th century. These fumigants applied before the 1980s have since migrated through soil layers into the groundwater.
Delay in Groundwater Appearance
Movement through soil and rock layers can take decades, so the detections relate to legacy contamination rather than recent discharges. This long-term delay explains why monitoring programs might find the compound years after its primary use ceased.
How the Treated Water Differs at the Tap Once the Documented Technology Is in Place
Effectiveness of Fleck 1,2,3-TCP Filter
The Fleck 1,2,3-TCP Filter uses a specialized filtration method designed to address chlorinated solvents like TCP. Households with existing equipment that cannot keep pace can configure this filter to complement their current setup, improving water quality regarding this constituent.
Improved Confidence in Water Quality
While Canyon County’s public water system record shows no health-based violations for 1,2,3-TCP, personal water treatment can provide an extra layer of assurance for residents concerned about trace compounds.
What a Certified Laboratory Test for This Constituent Reports and How to Read It
Understanding Lab Results
A certified lab test for 1,2,3-trichloropropane reports concentrations in micrograms per liter (µg/L), which corresponds to parts per billion (ppb). Values below 0.03 µg/L are typically reported as non-detected due to current reporting limits.
Interpreting Your Results
Because no federal maximum contaminant level exists for 1,2,3-TCP, readings simply indicate the detected concentration relative to the reporting level. A result below this threshold aligns with the evidence from City of Caldwell’s monitoring showing no measurable presence above this level in the public system.
How the Constituent Enters Groundwater or the Distribution System in This Region
Sources of TCP in Groundwater
In Canyon County, TCP primarily enters groundwater through residual contamination related to historical fumigant use in agriculture, as well as potential leaching from soil where past practices introduced the chemical.
Movement to Distribution Systems
This groundwater supplies the City of Caldwell’s municipal water, where treatment and monitoring take place. The documented absence of detections above the reporting level in monitoring indicates that treatments and source protection are effective at maintaining low TCP levels.
For residents wishing to know their home's specific concentration of 1,2,3-trichloropropane, the recommended course is to order a certified laboratory water test targeting this compound. A result showing non-detection or concentration at or below the 0.03 µg/L reporting level would confirm your water quality aligns with regional government findings.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-05-28. 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 Caldwell (ID3140013), ID: 26 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level