Fleck 1,2,3-TCP Filter

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This week, households in Dennis face a choice about how to handle 1,2,3-TCP in their water as existing equipment reaches its limits.

How a soil fumigant impurity from the 1950s-1980s reached deep groundwater decades later

Legacy use of soil fumigants included 1,2,3-TCP as an impurity

1,2,3-trichloropropane (TCP) was not intentionally applied but appeared as an impurity in soil fumigants used extensively in the mid-20th century. Though banned decades ago, TCP persists in the environment due to its chemical stability and slow degradation.

Deep groundwater beneath Barnstable can reflect past agricultural and industrial activity

The Dennis Water District draws from groundwater serving about 65,000 people. Despite historical contamination concerns, federal records from 2013-2015 show no detected TCP above the reporting level in this system's samples.

Why 1,2,3-trichloropropane resists air stripping and what that means for treatment choice

TCP's chemical properties limit volatility

Unlike many chlorinated solvents, TCP has low volatility, making air stripping ineffective for reducing it in water supplies. This characteristic challenges removal efforts relying on air-phase transfer.

Specialized filtration technologies better address TCP presence

Households needing to improve treatment capacity beyond existing equipment should consider options designed for TCP's resistance traits.

How the treated water differs at the tap once the documented technology is in place

Advanced filtration can maintain flow and performance for TCP challenges

When equipped with the Fleck 1,2,3-TCP Filter, water treatment can handle higher usage demands while effectively targeting TCP and similar chlorinated solvents. This filter ships ready to configure and complements your current approach.

Treated water supports household needs without changes to taste or safety

The filtered output preserves water quality characteristics and complies with all federal health-based standards for the Dennis Water District system, which presently has no violations.

Granular activated carbon contact time: why bed depth matters more for TCP than for taste

Longer contact time enhances TCP adsorption

Granular activated carbon (GAC) is the key technology in the Fleck filter. TCP requires more bed depth and contact time than substances affecting taste because of its molecular structure and persistence.

Proper GAC design supports household capacity increases

Expanding treatment capacity with adequate carbon bed depth ensures efficient handling of TCP as household water demand grows.

How public-system records differ from private-well testing in what they establish

Public system data provides community-level monitoring

The EPA's monitoring of the Dennis Water District measures groundwater from multiple sources serving thousands of connections, offering a collective snapshot rather than individual well readings.

Individual testing is necessary to confirm home water conditions

To determine your home's 1,2,3-trichloropropane levels, order a private water test. This is the only way to know if your specific water requires enhanced treatment.

Closing recommendation: Confirm your home's water quality with a private 1,2,3-TCP test measuring parts per billion (µg/L). A result below 0.03 µg/L, the federal reporting level, is consistent with the public system's past record and suggests current treatment options like the Fleck 1,2,3-TCP Filter will meet your household's needs.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2014-10-15. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Dennis Water District (MA4075000), MA: 20 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level