This week, you face the decision of whether and how to address any potential presence of 1,2,3-trichloropropane (TCP) in your household water supply in West Virginia.
How a Soil Fumigant Impurity from the 1950s-1980s Reached Deep Groundwater Decades Later
1,2,3-trichloropropane is a chlorinated solvent once used as an impurity in soil fumigants during the mid-20th century, particularly between the 1950s and 1980s. These fumigants were applied to agricultural fields to control pests and improve crop yields. Over time, TCP, being a persistent and mobile compound, leached from affected soils and migrated through the subsurface environment. This slow movement through soil and rock layers allowed it to reach deep groundwater reservoirs decades after application ceased. The delayed groundwater presence explains why some water systems may register TCP detections long after the original agricultural use ended.
Why 1,2,3-Trichloropropane Resists Air Stripping and What That Means for Treatment Choice
Unlike many volatile organic compounds, TCP has physical and chemical properties that make it resistant to removal by air stripping methods. It exhibits a low vapor pressure and moderate water solubility, causing it to remain dissolved and persistent in water rather than readily volatilizing. This chemical behavior means that standard water treatment options relying on aeration or air stripping will not effectively reduce TCP concentrations. Instead, treatment approaches must focus on technologies capable of adsorbing or chemically interacting with TCP molecules to achieve meaningful reduction.
What Distinguishes This Problem from the Two Problems Most Often Confused with It
TCP contamination is sometimes confused with other chlorinated solvents or common water quality problems such as total dissolved solids or disinfectant byproducts. Unlike aesthetic issues like taste or staining related to minerals, TCP is a synthetic chlorinated solvent of concern due to its industrial and agricultural origin. It differs from compounds like trichloroethylene or perchloroethylene in molecular structure and treatment behavior. Recognizing these distinctions helps in selecting appropriate testing and treatment methods instead of assuming generic approaches suffice.
What the Reader Should Write Down Before Asking Anyone for Treatment Advice
If you are considering treatment options, begin by obtaining a certified laboratory analysis of your own water supply to determine if 1,2,3-trichloropropane is present and at what concentration. Note that government sampling for Berkeley County PSD — Bunker Hill in West Virginia detected no 1,2,3-TCP above the reporting level of 0.03 micrograms per liter (µg/L) or parts per billion (ppb) during the 2013-2015 EPA Unregulated Contaminant Monitoring Rule (UCMR3) period. However, system-level data cannot replace home-specific testing. Record your water source, any previous water quality reports, and any symptoms or concerns observed. These notes will inform tailored treatment advice.
How California's 5 ng/L State Limit Compares with the Absence of a Federal MCL
California enforces a stringent public health goal of 5 nanograms per liter (ng/L), equivalent to 0.005 µg/L, for 1,2,3-trichloropropane in drinking water. This level is considerably lower than the federal reporting threshold of 0.03 µg/L used in EPA monitoring. The federal government has not established a Maximum Contaminant Level (MCL) for TCP, reflecting ongoing evaluation and regulatory considerations. This absence means detections at or above reporting levels do not signify violations or mandated action at the federal level. Consumers concerned about TCP can view California’s limit as a conservative benchmark for precaution.
Government records for the Berkeley County PSD public water system clearly show no health-based violations related to TCP or other specified contaminants during the latest monitoring cycle. This data represents the system serving thousands of connections in West Virginia but does not substitute for individual water testing. For detailed information, review the EPA's Safe Drinking Water Information System (SDWIS) and Unregulated Contaminant Monitoring Rule data for Berkeley County PSD - Bunker Hill at the official EPA website.
If your home’s water test detects 1,2,3-trichloropropane and you decide to address it, the Fleck 1,2,3-TCP Filter ships ready to configure and uses proven methods to tackle chlorinated solvent presence effectively. Exploring treatment options that specifically target TCP can help meet your household’s water quality goals following a confirmed test.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-09-03. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Berkeley County PSD - Bunker Hill (WV3300202), WV: 8 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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