Fleck 1,2,3-TCP Filter

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Why 1,2,3-Trichloropropane Resists Air Stripping and What That Means for Treatment Choice

1. Chemical Properties of 1,2,3-TCP Limit Air Stripping Effectiveness

1,2,3-trichloropropane (TCP) is a chlorinated solvent that resists removal by air stripping because it has low volatility and strong molecular stability. This means methods relying on volatilization are ineffective for reducing TCP levels in water.

2. Alternative Treatment Methods Are Needed

Because of these chemical properties, effective treatment methods typically involve adsorption technologies rather than air stripping approaches. This influences the choice of equipment for residential use.

How California's 5 ng/L State Limit Compares with the Absence of a Federal MCL

1. California's Stringent 1,2,3-TCP Limit

California sets a state maximum contaminant level at 0.005 micrograms per liter (5 ng/L or 0.005 parts per billion) for 1,2,3-TCP, reflecting precautionary regulatory standards.

2. No Federal MCL Exists for 1,2,3-Trichloropropane

Federal regulations currently do not establish a maximum contaminant level for TCP, so no federal limit applies. Public water system sampling reports occurrence data without classifying levels as violations.

How Public-System Records Differ from Private-Well Testing in What They Establish

1. Public Water System Data Reflect Community-Wide Groundwater Sources

The City of Alexandria's public water system, serving about 66,798 people in Rapides Parish, sources from groundwater and reported no detections of 1,2,3-TCP above its reporting level of 0.03 micrograms per liter. This does not indicate individual household water quality but shows system-wide measurements.

2. Private Well Testing Is Required to Know Household Water Quality

Individual household water quality for TCP can only be established through direct testing of that home's water supply. Public system data is a regional reference rather than a household-specific reading.

The Household or Facility Symptoms That Do and Do Not Point to This Problem

1. No Taste, Color, or Odor Change Is Typical for 1,2,3-TCP

1,2,3-trichloropropane typically does not cause aesthetic changes such as taste or odor detectable by residents. Its presence is generally odorless and colorless.

2. Symptoms Are Rare and Usually Require Laboratory Analysis to Detect

Because TCP is a chemical trace constituent, household symptoms alone do not reliably indicate its presence. Confirmed detection requires laboratory water testing.

How Seasonal or Multi-Year Variation Shows in the Record (Dates and Ranges Given)

1. Monitoring from 2013 to 2015 Shows No Detectable TCP in the System

Between February and August 2015, the City of Alexandria carried out federal unregulated contaminant monitoring for TCP with 20 samples taken and no detections above 0.03 micrograms per liter. This suggests stable low levels in sample periods.

2. Limited Variation Indicates Consistently Low Occurrence in Groundwater Supply

The absence of TCP detections over multiple months and samples indicates no significant seasonal or multi-year spikes in this system’s measurements.

How to Compare This Area's Record with a Neighboring County's Without Overreading It

1. Sampling Variability Reflects Source Differences, Not Household Conditions

Variation between counties in detected levels of TCP or other contaminants arises from differences in groundwater and land use, not from individual household water quality, which requires direct testing.

2. Use Public System Records as Regional Indicators, Not Predictors of Personal Water

Comparing public water system reports is useful for understanding regional water profiles but does not substitute for private water testing when choosing treatment equipment.

Summary

Choosing equipment for 1,2,3-trichloropropane treatment in Rapides Parish requires understanding that no federal maximum contaminant level exists and local system data shows no TCP detection above reporting limits. Household water quality must be determined by direct testing. The Fleck 1,2,3-TCP Filter ships ready to configure and uses technology suited to address TCP’s chemical resistance to air stripping, providing a documented solution for households seeking to manage this constituent.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-08-13. 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 Alexandria (LA1079001), LA: 20 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level