Whole House 1,2,3-TCP Reduction Water Filter System - Trichloropropane Removal
California's 5 Nanograms per Liter Limit Versus the Absence of a Federal MCL
In considering 1,2,3-trichloropropane (TCP) in water, it is important to understand how regulatory thresholds differ. California has set a state limit at 5 nanograms per liter (ng/L), equivalent to 0.005 micrograms per liter (µg/L), reflecting a precautionary approach. By contrast, the U.S. Environmental Protection Agency (EPA) has not established a federal maximum contaminant level (MCL) for this chlorinated solvent. Therefore, while California's limit is among the most stringent, EPA records for the City of Bismarck’s public water system serving Burleigh County show no detections of TCP above the reporting level of 0.03 µg/L (30 ng/L) in monitoring data from 2013 to 2015. This absence of detections above that threshold means no federal regulatory action is triggered, though it does not guarantee individual water sources are free of TCP. The difference in these reference levels frames how homeowners might evaluate their water quality data against local and national standards.
Why 1,2,3-Trichloropropane Resists Air Stripping and What That Means for Treatment Choice
Treated water systems and household applications face unique challenges with 1,2,3-TCP due to its chemical properties. This chlorinated solvent is not effectively removed by air stripping, a common treatment method for volatile organic compounds, because TCP has a relatively low volatility and strong water affinity. Therefore, air stripping alone may not sufficiently reduce TCP concentrations in residential water supplies. Instead, treatment technologies relying on adsorption, such as granular activated carbon or specialized filter media, are more effective. Selecting a water treatment approach must consider TCP’s resistance to stripping and focus on options scientifically documented to address this compound specifically.
The Role of Plumbing Material and Age, Separate from the Source Water
Water quality at the tap is influenced not only by source water characteristics but also by the plumbing infrastructure within the home. Materials used in plumbing and the system’s age can affect chemical interactions, but they generally do not introduce 1,2,3-TCP into water. This compound is primarily introduced from environmental contamination of source waters, not from household plumbing materials. Understanding this distinction helps homeowners avoid attributing TCP presence to internal plumbing and focus attention appropriately on source water testing and treatment. If plumbing materials are suspected to impact water quality in other ways, separate analysis is recommended.
What the Reader Should Write Down Before Asking Anyone for Treatment Advice
Before seeking guidance on water treatment for TCP, homeowners should gather key information to ensure accurate advice. This includes:
- Results from recent water testing of their own tap water, specifically measuring 1,2,3-trichloropropane concentration in micrograms per liter or parts per billion.
- Details about their water source, whether municipal or private, including any available water quality reports or public system monitoring data.
- The household’s average daily water usage and peak demand periods.
- Information on existing treatment equipment, if any, and plumbing materials used in the home.
Having these details enables more precise evaluation of treatment options tailored to the household’s conditions.
How to Judge Treatment Capacity Against the Household's or Facility's Daily Demand
Choosing a treatment technology for 1,2,3-TCP involves matching its capacity with the volume of water the household consumes daily. Systems designed for TCP use adsorption media that have specific capacity limits before media replacement or regeneration is needed. It is essential to estimate daily water demand accurately and select a technology capable of handling that flow without compromising treatment effectiveness. For larger households or those with higher water use, a system with higher throughput capacity or more frequent media changes may be required. Careful consideration of these factors ensures sustained reduction of 1,2,3-trichloropropane where present.
What Not to Conclude from Area Data Alone
While the City of Bismarck’s public water system data from EPA monitoring shows no detected 1,2,3-TCP above 0.03 µg/L in Burleigh County, this regional information does not confirm an individual home’s water is free from TCP. Localized contamination or private wells can have different levels. Only a direct water test from the specific household water source can establish the actual presence and concentration of 1,2,3-trichloropropane. Area data provides a useful context but should not replace personal water analysis when evaluating treatment needs.
The C-Series 1,2,3-TCP Filter, which ships ready to configure, offers a technology option that addresses this compound effectively by using specialized adsorption designed for chlorinated solvents like TCP. It can be considered after confirming the household’s specific water conditions and treatment capacity requirements.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-02-11. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for City of Bismarck (ND0800080), ND: 4 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level