Government sampling of the Harrison Co. Water Association's public water system in Harrison County, KY, found no detections of 1,2,3-trichloropropane (1,2,3-TCP) above the reporting level of 0.03 micrograms per liter (µg/L), or parts per billion, during a 2014-2015 federal survey. This means that within the public water system serving over 16,000 people, 1,2,3-TCP was not measured at levels above this low threshold, but this does not determine the concentration in any individual household's water supply. Testing of your own water is necessary to understand your home's specific condition.
If you want to compare federal and state health benchmarks
While federal regulations have not established a maximum contaminant level (MCL) for 1,2,3-TCP, some states apply their own limits. For example, California sets a state maximum contaminant level at 0.005 micrograms per liter (5 nanograms per liter), a much lower benchmark than federal reporting levels. Because the federal system records no detections above 0.03 µg/L, the public water system data from Harrison County do not directly correspond to California’s stricter standard. This difference highlights that absence of a federal MCL does not imply uniform safety levels everywhere, and it suggests the need for private testing if there are concerns about meeting more stringent limits.
If you consider the area's agricultural use and potential chemical sources
Harrison County has areas historically used for agriculture, which can influence the presence of chlorinated solvents like 1,2,3-TCP in local water. 1,2,3-TCP is a chemical once used as a soil fumigant and in some industrial processes. It can migrate to surface water sources over time due to land use patterns. The public water supply draws from surface water and is subject to federal monitoring based on occurrence surveys. Government data showing no measurement above reporting levels suggests no widespread, elevated presence of this solvent in the system, but local variations could exist. Testing household water provides clarity on any potential exposure at specific locations.
If you want to understand the significance of the reporting level for 1,2,3-TCP
The reporting level for 1,2,3-trichloropropane is set at 0.03 micrograms per liter (30 parts per trillion), a figure thousands of times lower than detection thresholds commonly used for metals like lead or iron in water. This extremely low reporting level reflects the potent nature of TCP and the caution taken in measuring its presence. Unlike metals, which are measured in micrograms per liter but at higher thresholds, the chlorinated solvent’s health concerns require sensitive analytical methods. This sensitivity also means many detections near this level represent trace amounts rather than significant contamination.
If you want to interpret terms like 'detected,' 'median,' and 'range' in monitoring reports
In the EPA occurrence data for the Harrison Co. Water Association, the term 'detected' means the chemical was measured at or above the laboratory’s minimum reporting level, not that it violates any health standard. 'Median' refers to the middle value of all measurements taken, which can provide a sense of typical concentration in the system. 'Range' indicates the lowest and highest amounts recorded during sampling. For 1,2,3-TCP, none of the 16 sample results exceeded the reporting level, resulting in no detections noted. Understanding these terms helps residents appreciate that absence of detection is not a guarantee of zero concentration, but does reflect measurements below very low thresholds.
If you are considering ongoing care for a dedicated treatment device
The Autotrol 1,2,3-TCP Filter ships ready to configure for home use and provides a method to address chlorinated solvent concerns. This filtration technology requires routine maintenance to ensure effectiveness, typically involving scheduled media replacement or cleaning cycles specified by the product documentation. Maintaining the system helps ensure sustained reduction of 1,2,3-trichloropropane should it be present in your water supply at detectable levels. Homeowners should follow the product’s guidance on care intervals and system checks to keep water treatment functioning as intended.
In summary, federal data indicate that the public water system in Harrison County, KY, has not recorded 1,2,3-TCP above detection thresholds, though private water testing is needed for individual household assessments. Understanding various regulatory and regional factors helps inform decisions about using dedicated filtration like the Autotrol 1,2,3-TCP Filter to manage potential concerns.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-03-19. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Harrison Co. Water Association (KY0490179), KY: 16 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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