Fleck 1,2,3-TCP Filter

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If your laboratory test report lists 1,2,3-TCP below 0.03 micrograms per liter (µg/L)

When a lab report shows 1,2,3-trichloropropane (TCP) levels below the reporting level of 0.03 µg/L, it means the concentration is too low for the instrument to confirm its presence reliably. For public water systems in New Haven County served by CT Water Co. - Shoreline R., Guilford S., government monitoring from 2013 to 2015 found no detections above this reporting threshold. This federal Unregulated Contaminant Monitoring Rule (UCMR3) data covers surface water sources supplying nearly 34,000 residents across Clinton, Guilford, Madison, Old Saybrook, Westbrook, and New Haven County. It is important to understand that no federal Maximum Contaminant Level (MCL) currently exists for TCP, so a low or undetected level does not indicate compliance or a violation but rather a lack of measurable presence in the system's source water during testing periods.

If you are concerned about the reporting level's sensitivity compared to metals testing

The reporting level for this chlorinated solvent is set at a fraction of a microgram per liter, thousands of times lower than typical detection levels for common metals such as lead or iron. This sensitivity reflects TCP’s classification as a synthetic organic chemical with potential long-term health effects observed in animal studies. Therefore, analytical instruments must detect these trace amounts to provide information on possible contamination. The very low reporting level aims to identify the presence of even minute amounts that might otherwise go unnoticed, prompting informed decisions about water treatment.

If you consider how 1,2,3-trichloropropane behaves in water treatment options

Unlike volatile compounds that can be removed through air stripping or simple aeration, 1,2,3-TCP is resistant to air stripping due to its low volatility and chemical stability. This characteristic limits treatment choices that rely on physical processes such as aeration. Instead, technologies including targeted filtration or advanced oxidation methods are more effective in addressing this constituent at the household level, as they can chemically or physically capture TCP molecules. Understanding this resistance to air stripping is critical when deciding on the type of treatment technology to acquire, especially if laboratory tests show detectable levels close to or above the reporting limit.

If you notice common household water symptoms and wonder if they relate to 1,2,3-trichloropropane

TCP does not typically cause noticeable taste, odor, or staining in water at the low concentrations monitored in New Haven County's public water systems. Household symptoms such as metallic taste, discoloration, or scale build-up more often relate to minerals, pH, or other secondary constituents. Because 1,2,3-trichloropropane is an organic solvent, it does not produce these sensory effects. Therefore, the presence or absence of general water quality symptoms should not be used to infer TCP concentrations or risks.

If you want to know how 1,2,3-TCP enters water supplies in this Connecticut region

TCP is an industrial chemical used historically in manufacturing and as a soil fumigant. In areas like New Haven County relying on surface water, TCP contamination in source water can occur from runoff or leaching from sites with past industrial or agricultural use, though no detections above the reporting level have been found in the CT Water Co. Shoreline system. Groundwater sources are more vulnerable to such contamination when near legacy chemical handling sites. Municipal surface water treatment and watershed protection measures typically reduce raw water exposure to synthetic organic solvents like TCP.

If you seek to understand how California’s 0.005 µg/L state limit compares to the lack of a federal MCL

California enforces a state maximum contaminant level for 1,2,3-trichloropropane at 0.005 µg/L (5 nanograms per liter), one of the most stringent in the country. This limit is below the federal UCMR3 reporting level of 0.03 µg/L and reflects the state’s precautionary approach to reduce long-term exposure. The absence of a federal MCL means that public water systems like the one serving New Haven County do not have a legally enforceable limit for TCP at the federal level, though monitoring may indicate presence or absence. For households evaluating laboratory results, comparing measured TCP levels to state guidelines where applicable can provide additional perspective on the need for treatment.

If you wonder what conclusions to draw from regional data and what you should do next

Government monitoring data for the CT Water Co. Shoreline system covering New Haven County from 2013 to 2015 showed no detects of 1,2,3-TCP above the 0.03 µg/L reporting level, with zero health-based violations recorded. This indicates that the public water supply meets federal health standards concerning this constituent. However, such system-wide data cannot confirm the TCP concentration in your household water supply, which can vary with plumbing and water source differences. To know your home's specific condition, a certified laboratory test of your tap water analyzing for 1,2,3-trichloropropane is necessary.

If testing reveals concentrations near or above 0.03 µg/L, selecting an appropriate water treatment technology designed to address chlorinated solvents is prudent. The Fleck 1,2,3-TCP Filter ships ready to configure and uses proven methods to reduce chlorinated organic compounds, including TCP. Choosing this filtration approach depends on your test results and treatment goals. Regardless, do not infer any individual home's water quality solely from regional monitoring data or system records.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2014-11-18. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for CT Water Co. - Shoreline R., Guilford S. (CT0608011), CT: 20 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level