Residents of Gulfport, Harrison County, MS, often consider water treatment options when they learn about 1,2,3-trichloropropane (TCP)—a chlorinated solvent once widely used as a soil fumigant. This page clarifies what the area's public water system data can and cannot tell you about TCP, helping you make an informed decision between different classes of water treatment equipment for your home.
If you want to understand the agricultural land-use history of Harrison County and its relation to 1,2,3-TCP detections
Harrison County's agricultural past, particularly from the 1950s through the 1980s, included the widespread use of soil fumigants containing chlorinated solvents like 1,2,3-trichloropropane. These chemicals were valued for crop protection but left a legacy of low-level residues in the environment. Over time, these residues have seeped into groundwater sources.
Government monitoring of the City of Gulfport’s public water system, which draws from groundwater, shows no detections of TCP above the reporting level of 0.03 micrograms per liter (equivalent to 0.03 parts per billion) during a federal survey conducted between 2013 and 2015. This indicates that TCP, if present, was below the measurement threshold throughout the system serving over 75,000 people.
If you want to know how a soil fumigant impurity from the mid-20th century reached groundwater decades later
1,2,3-trichloropropane does not readily break down in soil and can migrate slowly through soil layers to reach aquifers. The deep groundwater supplying Gulfport is therefore subject to legacy contamination from historic agricultural practices. Even though concentrations detected by recent federal monitoring are low or below detection levels, the slow movement and persistence mean TCP can still be present at trace levels.
If you are reviewing a certified laboratory test report for 1,2,3-TCP and want to understand the results
A laboratory test specifically for 1,2,3-trichloropropane will report concentrations in micrograms per liter or parts per billion. In Gulfport, federal monitoring reported no results above 0.03 micrograms per liter, which is the detection threshold used. Test reports showing results below this level mean TCP was not detected at or above that amount but do not guarantee zero presence.
It's important to recognize that detection is not synonymous with violation or health risk. The EPA has not established a maximum contaminant level (MCL) for 1,2,3-TCP, making regulatory interpretation different from substances with enforceable limits.
If you want to judge treatment capacity against your household’s water demand
When selecting between water treatment equipment classes capable of addressing constituents like 1,2,3-trichloropropane, understanding daily household water use is essential. Treatment solutions should align with your peak and average consumption to ensure effective contact time and throughput.
For families in Gulfport, typical household water use patterns, combined with an understanding of equipment flow rates and capacity, help determine the right scale of treatment. For example, a properly sized, direct-purchase Fleck 1,2,3-TCP Filter ships ready to configure and is designed to handle residential demand efficiently.
If you are curious about how 1,2,3-trichloropropane enters groundwater or the distribution system in Harrison County
TCP finds its way into groundwater primarily through historic agricultural applications of fumigants containing this chlorinated solvent as an impurity. From these original uses, TCP leaches into soil and migrates downward over decades, eventually reaching the groundwater that supplies municipal wells. Once in the aquifer, this contaminant can be introduced to the public water distribution system through well extraction.
If you want to understand what the measured range for 1,2,3-TCP means compared to federal standards, and what it does not mean
Federal monitoring results from 2013-2015 for the City of Gulfport public water system showed zero detections of 1,2,3-TCP above the 0.03 micrograms per liter reporting level. The EPA currently has no maximum contaminant level for TCP, which means detected concentrations—even if above reporting thresholds elsewhere—do not represent a legal violation or established health risk. Absence of detection above the reporting level similarly indicates concentrations were very low or undetectable at the time of sampling but does not guarantee permanent absence.
The data reflects system-wide measurements and cannot specify concentrations at any individual household tap. A certified private test targeting your home's water is necessary for precise evaluation.
Ultimately, when the level of 1,2,3-trichloropropane in your household water is of concern and you have measured your daily water use, the Fleck 1,2,3-TCP Filter provides a documented treatment option. This equipment, ready to configure for residential demand, can help address TCP and support confident water quality management in Gulfport homes.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-02-03. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for City of Gulfport (MS0240003), MS: 18 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level