Fleck 1,2,3-TCP Filter

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If you know California's 5 ng/L limit but see no federal MCL for 1,2,3-TCP

California has set a state maximum contaminant level of 0.005 micrograms per liter (µg/L), also known as 5 nanograms per liter (ng/L), for 1,2,3-trichloropropane (TCP). This chlorinated solvent's presence at very low levels can prompt regulatory action there. However, the Environmental Protection Agency (EPA) does not currently have a federal maximum contaminant level (MCL) for TCP. This means public water systems like the Western Virginia Water Authority, serving Roanoke City, do not have a legally enforceable limit for this compound at the federal level. The public water system's monitoring under the EPA's Unregulated Contaminant Monitoring Rule 3 (UCMR3) from 2013-2015 found no detections of TCP above the reporting level of 0.03 µg/L (30 ng/L), which is significantly higher than California's limit but serves as a practical monitoring threshold rather than a health standard.

If you want to confirm your household water quality after equipment failure starting from the simplest step

The best approach is to start with your water provider's annual water quality report, which includes data about regulated contaminants and summaries of unregulated contaminant monitoring for your public water system. For individual confirmation of 1,2,3-TCP in your home's water, you would need to request a laboratory water test from a certified water-testing facility that can detect TCP at or below the reporting level of 0.03 µg/L. Testing for 1,2,3-TCP is a specialized analysis and generally costs more than routine water tests. Prior to specialized testing, ensuring your household plumbing and filtration devices function correctly can avoid misinterpretation of results stemming from equipment issues.

If you consider how soil fumigants from decades ago relate to today's water quality

1,2,3-trichloropropane originally was used as a soil fumigant and an industrial solvent mainly between the 1950s and 1980s. Though its production in the United States ceased for many years, residues remain in the environment. This chlorinated solvent can leach from contaminated sites or soils into groundwater, sometimes decades later, posing a potential water quality concern if groundwater supplies drinking water. Public water systems using surface water sources, like the Western Virginia Water Authority, typically are less vulnerable to historic groundwater contamination but remain subject to comprehensive monitoring.

If you want to understand what the number of samples means in your area's water quality report

The EPA's UCMR3 data for the Western Virginia Water Authority includes 41 samples collected between April 2014 and December 2015. None showed 1,2,3-TCP concentrations above the reporting level of 0.03 µg/L. Although 41 samples provide a reasonable snapshot over time and locations served, they represent a limited dataset compared to ongoing routine monitoring. A small sample count means recent changes or localized contamination could go undetected. A single home's water quality might differ due to plumbing, private wells, or localized conditions, so laboratory testing of water directly from your taps remains the only way to confirm your water's 1,2,3-TCP levels.

If you want to understand what differences exist between public water system data and private well testing for 1,2,3-TCP

Public water system records like those for Roanoke City's water authority reflect the quality of water as it leaves the treatment plant and enters the distribution network shared among many households. These data do not reflect private well water conditions, which can vary significantly based on local geology, contamination sources, and well construction. Private wells are the homeowner's responsibility for water quality testing and treatment decisions. Public system data provides reassurance about the source water and general service area but cannot substitute for specific testing of a private supply or individual household plumbing issues, especially after equipment failure.

If you want to know exactly what shows on a certified laboratory 1,2,3-TCP test report and how to read it

A certified laboratory test report for 1,2,3-trichloropropane will list the detected concentration in micrograms per liter (µg/L) or parts per billion (ppb), often the same measure written differently. The report will indicate either a numerical value or "ND" for not detected if TCP is below the laboratory's reporting level, such as 0.03 µg/L. The report may also list method detection limits and quality control results to confirm the validity of the test. Importantly, a detection does not imply the water is unsafe or in violation of any standard. Only state or federal standards apply to regulatory interpretations. For Roanoke City, no federal MCL exists for 1,2,3-TCP, so test results guide consumer decisions rather than compliance actions.

In summary, the Western Virginia Water Authority's public water system, serving Roanoke City, reported no detections of TCP above the reporting level in federal monitoring from 2013-2015. This data represents the system's water quality at the point of entry for tens of thousands of service connections and does not reflect individual household conditions or equipment. For the most accurate assessment, testing water directly from household taps by a certified laboratory is necessary after existing equipment fails. The Fleck 1,2,3-TCP Filter ships ready to configure and is designed to address this specific chlorinated solvent, providing a documented solution for households considering treatment options. All public water quality data cited can be found at the EPA's Safe Drinking Water Information System and UCMR databases.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-12-17. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Western Virginia Water Authority (VA2770900), VA: 41 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level