1,2,3-TCP in Lyon County Groundwater: Understanding Dayton Valley Water Quality Challenges
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Whole House 1,2,3-TCP Reduction Water Filter System - Trichloropropane Removal
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Understanding the Region's Agricultural Land Use and 1,2,3-TCP Findings
Legacy farming practices in Lyon County's agricultural zones
From the mid-20th century, extensive agricultural activities near Dayton and Moundhouse have shaped the landscape and water usage. These operations frequently employed soil fumigants containing chlorinated compounds, which have had lingering impacts on groundwater.
Historical fumigant use corresponds with measured 1,2,3-trichloropropane levels
Samples from the Dayton Valley Water System, serving over 16,000 people, show no detections above 0.03 micrograms per litre (parts per billion) of 1,2,3-TCP, a chlorinated solvent once used in soil fumigation. These findings align with the agricultural history of the region.
Persistence of Soil Fumigant Impurities in Groundwater Over Time
How 1950s-1980s fumigants reached deep groundwater decades later
Chlorinated solvents like 1,2,3-trichloropropane are known for their environmental persistence. Residues from decades-old fumigant use have migrated downward through soil and rock, eventually reaching the groundwater supplies tapped by the Dayton Valley Water System.
Delay between application and detection due to chemical stability and transport
The chlorinated solvent resists breakdown and volatilization, causing it to move slowly with groundwater flow. This explains its presence years after agricultural application has ceased.
Comparing California's State Limit for 1,2,3-TCP to Federal Regulations
California's 5 ng/L (0.005 µg/L) standard versus no federal maximum contaminant level
While the federal Safe Drinking Water Act has not established a maximum contaminant level (MCL) for 1,2,3-TCP, California regulates this compound at a notably lower concentration than the EPA's reporting level of 0.03 micrograms per litre (30 ng/L). Dayton Valley Water System records reflect no federal health-based violations.
Implications for households relying on public water in Lyon County
Given no detections above the federal monitoring reporting level, households draw water meeting EPA health-based criteria. However, those wanting to address even trace levels consistent with California’s limit face a complex choice.
How the Pentair 1,2,3-TCP Filter Addresses Household Needs
Technology designed to reduce trace chlorinated solvents like 1,2,3-trichloropropane
The Pentair 1,2,3-TCP Filter employs specialized filtration technology that targets TCP molecules to reduce their concentration in residential water supplies. This can supplement existing equipment for households.
Ships ready to configure for household application
This filter is a direct purchase option. It ships ready to integrate with home water systems, supporting families whose current equipment cannot fully address trace TCP presence.
How 1,2,3-Trichloropropane Enters Groundwater and Distribution Systems in Lyon County
Leaching from historic agricultural fumigant use into groundwater supplies
TCP residues leach downward from former fumigated soils to the groundwater source feeding Dayton Valley Water System. This pathway is well documented in environmental studies of the region.
Distribution through the system's network reaching households in Dayton and Moundhouse
The water system distributes groundwater with monitored TCP levels below detection thresholds to roughly 7,100 service connections, including residential customers.
Sampling Scope and Interpretation of TCP Data
18 samples collected between 2013 and 2015 with no detections above reporting limits
The federal Unregulated Contaminant Monitoring Rule required testing over several months. All 18 samples taken from Dayton Valley Water System showed 1,2,3-TCP concentrations below 0.03 µg/L (parts per billion), indicating levels too low for direct measurement by EPA instruments during that period.
Significance of sample size and what it means for individual wells
While these data are sufficient to characterize the overall water system, individual homes’ water quality can vary. Specific testing of household wells or taps is necessary to determine personal water chemistry accurately.
Decisions about upgrading water treatment should consider both system-wide data and household-specific testing.
In summary, this page reviewed how agricultural history and chemical properties explain the TCP monitoring results for Dayton Valley Water System. It contrasted regional detections with regulatory comparisons and detailed how the Pentair 1,2,3-TCP Filter provides a direct-purchase option for households needing additional treatment capacity.
Choosing an effective response depends on understanding these factors and confirming water quality through targeted testing before supplementing existing equipment.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2013-08-26. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Dayton Valley Water System (NV0000032), NV: 18 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level