Addressing 1,2,3-TCP in Barnstable County Water: Understanding Capacity and Variation

Many households in Yarmouth, Barnstable County, MA, may worry that their water contains 1,2,3-trichloropropane (1,2,3-TCP), but it is important to understand what public water system data indicates before drawing conclusions. No samples from the Yarmouth Water Department detected 1,2,3-TCP above the reporting level during federal monitoring between 2013 and 2015. This does not guarantee any particular household’s water is free from 1,2,3-TCP or that treatment is unnecessary, but it sets a baseline for informed water management decisions.

1. How Sampling Factors Affect Expectations for 1,2,3-TCP Levels

Sample depth and groundwater source influence detections

Results come from groundwater samples taken by the public water system at various depths. Deeper wells may have different 1,2,3-TCP profiles than shallow ones, so your home's well or connection point could vary from system averages.

Limited sampling points mean localized conditions may differ

The public water system serves nearly 39,000 people through about 16,360 connections, but federal testing sampled only specific wells and timeframes. Individual water quality may differ locally within Yarmouth.

2. Judging Treatment Capacity Relative to Household Water Use

Match treatment flow capacity to daily residential demand

Even if existing water treatment equipment functions, households with higher-than-average water use may exceed its capacity to address 1,2,3-TCP or similar contaminants effectively.

Capacity must consider peak and average daily water consumption

Evaluating your household’s daily water volume is key before choosing additional treatment solutions that can handle 1,2,3-TCP removal as water demand fluctuates.

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

1,2,3-TCP has no distinctive taste or odor

Unlike some water concerns, 1,2,3-TCP does not produce noticeable smell or flavor differences, so typical sensory checks are not reliable for detection.

Discoloration or staining is unlikely to correlate with 1,2,3-TCP

Visual signs like staining or discoloration generally relate to other water quality factors, not 1,2,3-TCP.

4. Additional Household Considerations Absent for Commercial or Industrial Users

Residential water use patterns differ from business or industrial facilities

Households typically have more consistent and predictable water use compared to commercial or industrial operations, affecting treatment solution choices and sizing.

Regulatory monitoring focuses on public water systems, not private wells

If your home uses a private well, its water quality must be tested independently to understand 1,2,3-TCP presence and treatment needs.

5. Seasonal and Multi-Year Variations in 1,2,3-TCP Detection Record

Sampling occurred from March to September 2015, reflecting part of the year

The 26 samples from Yarmouth Water Department were collected over several months, so they represent typical spring and summer conditions but not full year variability.

Year-to-year trends require ongoing monitoring to detect changes

Water quality can shift based on multiple factors such as rainfall, groundwater recharge, and land use, so periodic retesting is needed to track trends in 1,2,3-TCP concentration.

What You Should Not Conclude From These Regional Data

Federal monitoring data from the Yarmouth Water Department shows no detectable 1,2,3-TCP above the reporting level during the surveyed period. However, this does not certify that any individual household’s water is free of 1,2,3-TCP or that no treatment is necessary. To have certainty about your home's water, testing specific to your supply point is essential.

For households whose existing water treatment equipment cannot meet ongoing water demands or concerns regarding 1,2,3-TCP, the Autotrol 1,2,3-TCP Filter system ships ready to configure. It is designed to address this constituent effectively and can help maintain consistent water quality aligned with household usage.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-09-17. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Yarmouth Water Department (MA4351000), MA: 26 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level