Clarkstown Rockland 1,2,3-TCP: Understanding Regional Water Data After Equipment Failure

Whole House 1,2,3-TCP Reduction Water Filter System - Trichloropropane Removal

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The Agricultural Land-Use History of Clarkstown and Its Relation to 1,2,3-Trichloropropane Detections

The history of land use in Rockland County, including Clarkstown, reveals areas where soil fumigants, including 1,2,3-trichloropropane (TCP), were applied, primarily from the mid-20th century through the 1980s. TCP can be a trace impurity in soil fumigants used on agricultural fields or in nearby industrial activities. This historical use explains regional presence trends of TCP in surface water supplies, as the town’s water system depends on surface water sources. Understanding this background helps clarify why TCP might appear in water system measurements, even decades after direct use ceased.

Why 1,2,3-Trichloropropane Resists Air Stripping and Its Impact on Treatment Choices

Unlike some volatile organic compounds, 1,2,3-trichloropropane has chemical properties that make it resistant to air stripping techniques, which rely on volatilization to reduce contaminants. Its low volatility means that air stripping is not effective in reducing TCP levels. For households experiencing failure of existing water equipment targeting contaminants, this characteristic signals that air stripping or aeration-based methods will not address TCP concerns effectively. Alternative technologies designed to adsorb or chemically transform TCP are necessary to manage this chlorinated solvent in drinking water.

Comparing Public-System Records and Private-Well Testing for 1,2,3-TCP in Clarkstown

The Clarkstown section of the public water system record from United Water New York provides a broad view of 1,2,3-TCP presence in treated water reaching homes across the area. Public-system data is based on large numbers of samples and aims to assess water quality at the distribution level. Private-well testing, by contrast, offers site-specific information limited to a single household's water. A public record showing no detections above 0.03 micrograms per liter (0.03 parts per billion) of TCP from 2014–2015 reflects water quality after treatment and mixing across many sources and customers. Private well results could vary widely and must be interpreted with their local context.

Sample Size and Its Implications: Interpreting the Number of TCP Tests and Wells

The United Water New York system serving Clarkstown reported 73 samples tested for 1,2,3-trichloropropane between 2014 and 2015, with all results below the detection threshold of 0.03 micrograms per liter. Having this many samples enhances confidence that widespread TCP contamination is unlikely in this public surface water system but does not guarantee absence in any one location. A smaller sample size would increase uncertainty. For homeowners, this volume of testing can inform decisions but does not replace the need for individual water testing in case of unique local conditions or equipment failure.

Pathways of 1,2,3-Trichloropropane into Groundwater and Distribution Systems in the Region

1,2,3-trichloropropane originates mainly from legacy agricultural fumigant impurities and certain industrial activities that have released it into the environment. In Clarkstown, the public water system relies on surface water which can reflect runoff from surrounding lands where TCP was historically used. The presence of TCP in water sources can result from leaching through soils into groundwater or directly into surface sources. Distribution systems generally show lower TCP than raw sources due to treatment and dilution. Understanding these pathways helps explain the detection patterns and guides effective treatment choices for homeowners.

Seasonal and Multi-Year Variations in 1,2,3-Trichloropropane Monitoring Data

The monitoring data from United Water New York, collected from January 2014 through October 2015, shows consistent results with all 73 tests below the detection limit. This period captures variations across seasons and operational conditions. The absence of detected 1,2,3-TCP during multiple seasons suggests stable low levels in the system during that timeframe. However, multiyear trends require updated data for current conditions, as environmental and source factors may change over time. Homeowners with failed equipment should consider recent testing to understand present water quality.

Closing: What Not to Conclude from Clarkstown’s 1,2,3-TCP Public Water Data

Clarkstown’s public water record for 1,2,3-trichloropropane shows no detections above 0.03 micrograms per liter in over 70 samples over nearly two years, indicating low levels in the shared water system but not guaranteeing any specific household’s water quality. This data does not replace the need for individual water testing, especially if existing treatment equipment fails. The presence or absence of TCP in local public water records cannot confirm conditions in private wells or home plumbing. For effective management of 1,2,3-TCP concerns, household water should be tested directly, and the documented approach of the C-Series 1,2,3-TCP Filter, which ships ready to configure, offers a specialized solution designed to address this chlorinated solvent reliably.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-10-01. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for United Water New York (NY4303673), NY: 73 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level