Household 1,2,3-TCP in Area 01: What to Do When Your Current Equipment Fails

If you have noticed that your current water treatment equipment has failed and you are worried about 1,2,3-trichloropropane (1,2,3-TCP) in your household water, it is important to understand the broader water system data available for your area before moving forward.

How to judge treatment capacity against your household's daily water use

Your treatment equipment needs to match your household’s water demand to be effective. Consider the number of people in your home and typical daily water usage, including drinking, cooking, bathing, and laundry. Treatment equipment like a C-Series 1,2,3-TCP Filter ships ready to configure to handle residential-scale water flow, but be sure its specifications align with your household’s volume needs to maintain water quality consistently.

How seasonal or multi-year variation appears in the water system record

The Mashantucket Pequot Water System, serving Area 01, underwent federal sampling under the EPA’s Unregulated Contaminant Monitoring Rule (UCMR3) from March to December 2015. During this period, water samples tested for 1,2,3-TCP showed no detections above the reporting level of 0.03 micrograms per liter in four separate tests. This multi-month range provides a snapshot that can indicate consistency in source water quality over different seasons.

What the terms 'detected,' 'median,' and 'range' mean in the regional water record

In the EPA UCMR3 results for Mashantucket Pequot Water System, 'detected' means the presence of the chemical was measured above a certain threshold. For 1,2,3-TCP, no readings exceeded the reporting level, meaning the chemical was not measurable above 0.03 micrograms per liter in those samples. Because there is no federal maximum contaminant level (MCL) for 1,2,3-TCP, no exceedances or violations are recorded.

How public water system records differ from private well testing

The Mashantucket Pequot Water System's data applies at the system level and does not determine the condition of water inside any individual home. Private wells can have very different water quality and require separate testing. To know your home's specific 1,2,3-TCP level, it is necessary to get a certified laboratory water test from a sample drawn at your tap.

The role of plumbing material and age, separate from the source water

While source water quality monitoring shows low or undetectable 1,2,3-TCP in the system, household plumbing systems may influence water quality differently. Older or deteriorated plumbing materials can sometimes affect taste or cause other issues unrelated to 1,2,3-TCP. Testing household water directly distinguishes these factors from source contamination.

Ultimately, the single most important step is to have your household water tested for 1,2,3-TCP by a laboratory that follows EPA-approved methods. A confirmed result will provide the clear information needed to determine whether treatment like the C-Series 1,2,3-TCP Filter is necessary to address your water quality and ensure your family’s peace of mind.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-12-15. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Mashantucket Pequot Water System (010106001), 01: 4 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level