How did a soil fumigant impurity from the 1950s–1980s reach deep groundwater decades later?
1,2,3-trichloropropane (TCP) is a chlorinated solvent that entered the environment primarily as a contaminant of soil fumigants used in agriculture during the mid-20th century. Over time, TCP migrated downward through soil layers to groundwater sources. This process can take decades due to slow movement through soil and rock. As a result, TCP may still be found in groundwater drawn by some public water systems that source from deep wells or aquifers influenced by historic land use patterns.
How does California’s 5 ng/L state limit compare with the absence of a federal MCL for 1,2,3-TCP?
Unlike some states, including California where a notification level of 5 nanograms per liter (or 0.005 micrograms per liter) has been established for 1,2,3-trichloropropane, the federal government currently has no maximum contaminant level (MCL) for this compound. This means there is no enforceable federal legal limit for TCP in drinking water. The Berkeley County PSD - Bunker Hill system’s records from 2013 to 2015 show no detections of TCP above the reporting level of 0.03 micrograms per liter (30 nanograms per liter). These measurements reflect monitoring results, not compliance tests or health violations. The lack of federal limits means that states and water systems may have differing approaches to monitoring and addressing occurrence.
What happens when this problem is left untreated for years, stated without exaggeration?
If 1,2,3-trichloropropane is present in drinking water at measurable concentrations, it may contribute to aesthetic or taste concerns as well as potential health considerations under long-term exposure scenarios. However, with no health-based violations recorded for Berkeley County’s public water system and consistent nondetection above the reporting limit, any impact on water quality at the consumer tap is likely minimal. If TCP were present and untreated over many years in a household water supply, periodic exposure could occur depending on source water quality and system changes. Testing the specific household water remains the only way to determine individual exposure.
What should you write down before asking anyone for treatment advice?
- Confirm the source of your household water: is it served by the Berkeley County PSD - Bunker Hill system or a private well?
- Obtain any recent water quality reports from your public water supplier, focusing on reported 1,2,3-TCP levels if available.
- Schedule a certified water test for your own household supply specifically measuring 1,2,3-trichloropropane concentration, as area data alone cannot define your tap water condition.
- Note any taste, odor, or staining issues that concern you.
- Identify the daily volume demand your household requires to properly size any treatment equipment.
What is the role of plumbing material and age, separate from the source water?
The composition and condition of household plumbing affects water quality but does not cause or increase 1,2,3-trichloropropane concentrations originating from source water. Materials such as plastic or copper pipes do not generate TCP; instead, plumbing might impact water chemistry characteristics like corrosion or discoloration independent of chlorinated solvents. Older plumbing may harbor biofilms or residual deposits but will not produce or amplify TCP. Therefore, treatment choices should address the source water condition and not assume plumbing contributes to 1,2,3-TCP presence.
For households in Berkeley County WV measuring TCP above their desired concentration based on individual water tests and water use demand, a Pentair 1,2,3-TCP Filter ships ready to configure for treatment. This equipment is designed to tackle TCP specifically and can be selected according to your daily water consumption needs.
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
- ✓ 90-Day Money-BackNo restocking fees — return within 90 days.
- ✓ Manufacturer WarrantyGenuine Fleck · Pentair · VIQUA equipment.
- ✓ Free Expert SizingTalk to a specialist and buy the right system the first time.