Fleck 1,2,3-TCP Filter

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Interpreting Laboratory Test Reports for 1,2,3-TCP in Household Water

When reviewing a laboratory analysis for 1,2,3-TCP (1,2,3-trichloropropane or TCP) in residential water, the report typically lists concentrations in micrograms per litre (µg/L) or parts per billion (ppb). These values indicate the measured amount of this chlorinated solvent in the water sample. However, the detection of 1,2,3-TCP alone does not establish whether a water source exceeds regulatory standards or poses a health risk; additional context and official limits must guide interpretation.

Why 1,2,3-Trichloropropane Resists Air Stripping and What That Means for Treatment Choice

1,2,3-trichloropropane is a chlorinated solvent known for its chemical stability and resistance to treatment methods like air stripping. Air stripping removes volatile compounds by transferring them from water to air, but due to TCP’s low volatility and chemical properties, this method is ineffective. Therefore, alternative treatment approaches, such as specialized filtration technologies, are necessary to address 1,2,3-TCP present in water supplies.

What the Measured Range Means Against the Relevant Federal Standard, and What It Does Not Mean

According to the EPA’s Unregulated Contaminant Monitoring Rule 3 (UCMR3) sampling of the Wailuku public water system (system ID HI0000212) serving 74,511 people, none of the 43 samples collected between May 2014 and February 2015 detected 1,2,3-TCP above the reporting level of 0.03 µg/L (0.03 ppb). The EPA has not established a federal maximum contaminant level (MCL) for 1,2,3-TCP, so there are no legal thresholds or violations reported for this substance in Wailuku’s water system. Detection in this context signals presence or absence above a method reporting limit, not contamination or health hazard. Individual household water may differ, but the public system’s record shows consistent nondetection above this level.

Which Fixtures, Appliances or Processes Are Affected First and Why

When 1,2,3-trichloropropane is present in water, even trace amounts, it can first affect water-using appliances and fixtures that directly contact untreated water, including ice makers, coffee brewers, and drinking water taps. TCP’s chemical properties mean it is not removed by simple filtration or aeration within these appliances, potentially impacting water taste or quality perception, though the public water record for Wailuku does not indicate detected levels above reporting thresholds. For households with concerns, point-of-use filtration designed to address chlorinated solvents can provide targeted treatment at these outlets.

What Changes for a Large Household, a Second Home, or a Seasonal Property

Households with higher water usage, seasonal occupancy, or secondary homes in Wailuku should consider that 1,2,3-TCP levels in their plumbing can vary due to standing water and flow frequency. Prolonged stagnation may concentrate any chlorinated solvent residues, while regular use can dilute such compounds. Since the public water system samples reflect broad-area data and not individual residence plumbing, testing your home water is important to determine specific conditions, especially in properties with variable occupancy.

How 1,2,3-TCP Enters Groundwater or the Distribution System in This Region

In Maui County, the Wailuku system relies primarily on surface water sources. 1,2,3-trichloropropane contamination typically originates from historical industrial uses of chlorinated solvents in agriculture or manufacturing, leading to soil or groundwater presence. Surface water can be affected through runoff or infiltration from land use activities involving chlorinated compounds. However, the Wailuku system’s monitoring data from 2014-2015 showed no measurable 1,2,3-TCP above 0.03 µg/L, suggesting minimal or no contribution from such sources during that period.

What You Should NOT Conclude from Area Data

The EPA's monitoring results for 1,2,3-trichloropropane in Wailuku’s public water system do not indicate any health-based violations or levels above the reporting threshold. This means the system’s water supply, as publicly reported, is compliant with current federal expectations for this constituent. However, these system-wide results do not reveal the specific 1,2,3-TCP concentration in your home’s tap water, which can vary due to plumbing materials, water age, or private well conditions if applicable. The data should not be taken as a guarantee of zero presence but as one piece of the overall water quality picture.

To address household concerns or confirm your water’s 1,2,3-TCP content, you can obtain a direct water test focusing on chlorinated solvents. If treatment is desired, a Fleck 1,2,3-TCP Filter, which ships ready to configure, offers a documented solution designed for chlorinated solvent challenges common to residential applications. This filtration approach targets 1,2,3-TCP and related compounds, providing an additional layer of water quality assurance for concerned homeowners in the Wailuku area.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-02-20. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Wailuku (HI0000212), HI: 43 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level