Autotrol 1,2,3-TCP Filter

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Why 1,2,3-Trichloropropane Doesn’t Respond to Air Stripping Like Other Contaminants

A common impression is that all chlorinated solvents can be removed by aeration or air stripping. However, 1,2,3-trichloropropane (TCP) differs due to its chemical properties. TCP is more resistant to volatilization, meaning it does not easily transfer from water to air. This trait limits the effectiveness of air-based treatment methods for residential water supplies. Consequently, households relying on such equipment may find their systems failing to reduce TCP concentrations effectively.

How California's 5 ng/L Standard Compares with the Absence of a Federal MCL for 1,2,3-TCP

While California has implemented a stringent 5 nanograms per liter (0.005 micrograms per liter) limit for 1,2,3-TCP, no federal Maximum Contaminant Level (MCL) has been established for this chemical. The absence of a federal MCL means water providers in Monmouth and Ocean counties, served by NJ American Water Co. - Coastal North, are not legally required to meet this specific threshold under federal law. Nonetheless, the California level offers a benchmark that some consumers use to evaluate their water quality concerns.

A Worked Example: Interpreting EPA’s Monitoring Record for Household Context

The EPA’s unregulated contaminant monitoring from 2013 to 2015 for the NJ American Water Co. - Coastal North system, covering Monmouth and Ocean counties, shows 36 samples for 1,2,3-TCP with zero detections above 0.03 micrograms per liter (30 nanograms per liter). Because this reporting level is higher than California's 5 ng/L standard, this monitoring does not confirm the presence or absence of TCP at lower concentrations. Homeowners cannot assume their own water contains or lacks TCP from this record alone. Testing of the household water supply specifically is necessary to establish actual concentrations.

Granular Activated Carbon Contact Time: Why Bed Depth Matters More for TCP than for Taste Issues

Granular activated carbon (GAC) filtration is an effective technology to address chlorinated solvents like 1,2,3-trichloropropane. For TCP, the depth of the carbon bed and the contact time between water and carbon are critical. Unlike taste-related compounds that can be managed with shorter contact times, TCP removal benefits from deeper carbon beds to provide sufficient adsorption. This explains why some prior equipment with insufficient GAC bed depth or flow rate may fail to reduce TCP to desired levels.

Household Symptoms That May or May Not Indicate the Presence of 1,2,3-TCP

TCP does not cause noticeable taste or odor changes in water at the low levels typically encountered. Therefore, absence of off-tastes or smells does not guarantee the chemical is absent. Conversely, common household water problems like staining, cloudy water, or hardness symptoms are unrelated to TCP. Detection or concern about 1,2,3-trichloropropane relies on specific water testing rather than sensory indicators.

Given the failure of existing equipment to address 1,2,3-TCP concerns, households in the affected NJ regions may consider the Autotrol 1,2,3-TCP Filter. This system ships ready to configure and uses proven granular activated carbon filtration tuned to the operating parameters necessary for effective contact time, matching the challenge indicated by demand figures from water tests. Testing household water for TCP concentration is a critical step to determine the exact need and performance expectation for this technology.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-09-08. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for NJ American Water Co. - Coastal North (NJ1345001), NJ: 36 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level