What Can Public Water System Records Tell a Household About 1,2,3-TCP in St. Charles, St. Louis County?
The EPA’s Unregulated Contaminant Monitoring Rule 3 (UCMR3) sampling from 2013 to 2015 for the MO American Water Company serving St. Louis County, including St. Charles, found no detections above 0.03 micrograms per liter (µg/L) of 1,2,3-trichloropropane (1,2,3-TCP) among 20 samples. Since this data pertains to the public water system as a whole rather than an individual household’s tap or private well, it provides regional context but does not reveal the specific concentration in any single home’s water. Homeowners interested in their own water quality should consider testing independently to determine local levels of 1,2,3-TCP.
How Has Agricultural Land Use in the St. Charles Area Influenced 1,2,3-TCP Detections?
Historically, agricultural practices in the St. Louis County region involved the use of soil fumigants containing chlorinated solvents like 1,2,3-TCP as impurities, primarily between the 1950s and 1980s. These chemicals were incorporated into pesticide products to control pests but were not the main active ingredients. Over decades, these soil fumigant residues migrated downward, reaching groundwater aquifers. However, the public water system's reliance on surface water supplies and current sampling indicate that any historic agricultural contributions have not resulted in detectable 1,2,3-TCP at or above the 0.03 µg/L reporting level in system water.
What Does Seasonal or Multi-Year Variation in 1,2,3-TCP Levels Look Like in This Data?
The 2013 to 2015 sampling period covers multiple seasons and years, showing consistent non-detection of 1,2,3-TCP across 20 samples. This stability suggests that seasonal fluctuations or episodic contamination events in the surface water source are minimal or below detection thresholds. Such absence of variation over this interval reassures that 1,2,3-TCP is not present at levels warranting federal regulation or concern for the public system during that timeframe.
How Does Water Treated by the Fleck Equipment Technology Differ at the Tap Regarding 1,2,3-TCP?
For households choosing water treatment equipment, the Fleck 1,2,3-TCP Filter is documented for addressing this chlorinated solvent effectively. When configured for home use, it acts directly on potable water to reduce levels of 1,2,3-trichloropropane should it be present. This technology operates without the need for additional plumbing services and ships ready to configure for residential demand. Using such filtration equipment provides an extra measure of assurance in managing 1,2,3-TCP presence at the tap, beyond the baseline water quality provided by the public system.
What Differences Matter When Using This Technology for a Large Household, Secondary, or Seasonal Home?
Larger households or properties with intermittent use may influence water treatment needs. The Fleck equipment’s capacity and maintenance requirements align with different consumption patterns without compromising performance. For seasonal homes, configuring the filter to accommodate periods of inactivity and flushing protocols can maintain effective treatment of 1,2,3-trichloropropane when water use resumes. This flexibility ensures treatment can be tailored to diverse household sizes and occupancy schedules.
Why Does 1,2,3-Trichloropropane Resist Air Stripping, and How Does This Affect Treatment Selection?
1,2,3-TCP’s chemical properties make it resistant to removal by air stripping, a treatment method relying on volatilization into the air. Because 1,2,3-TCP is relatively non-volatile compared with other chlorinated solvents, air stripping is ineffective for meaningfully lowering its concentration. Consequently, water treatment options for this contaminant require technologies like specialized filtration that can adsorb or chemically bind 1,2,3-TCP molecules, such as the Fleck approach.
How Did Soil Fumigant Impurities From Decades Ago Reach Groundwater, and What Does That Mean Today?
Chlorinated solvents like 1,2,3-trichloropropane entered the environment as impurities in soil fumigants decades ago, allowing accumulation in subsurface water over time due to slow degradation rates and soil transport. Although deep groundwater contamination can persist, the surface water source supplying St. Charles and St. Louis County appears unaffected at detectable levels according to EPA data. For homeowners utilizing private wells or alternative sources, specific water testing is essential to understand current TCP presence.
In summary, EPA data from MO American Water Co. for St. Charles and St. Louis County show no detections of 1,2,3-TCP above 0.03 µg/L in public surface water supplies during 2013-2015. Households seeking to manage potential 1,2,3-trichloropropane in their tap water can consider the Fleck 1,2,3-TCP Filter, which ships ready to configure and targets this chlorinated solvent effectively. Understanding historic agricultural impacts, data variability, and treatment technology characteristics helps families make informed decisions about their water quality.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2013-11-06. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for MO American Water Co. - St. Louis County (MO6010716), MO: 20 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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