Decision Time: Confirm Your Water Quality This Week
If your current equipment isn't keeping up with concerns about 1,2,3-trichloropropane, or TCP, in your household water, you face a straightforward choice: get clarity on your water quality and consider targeted solutions that handle this chlorinated solvent effectively.
1. Agricultural Land Use and 1,2,3-TCP Detection in Puerto Rico
Past Soil Fumigation Reflects Today’s Groundwater
Historically, areas of Puerto Rico, including the region served by the Arecibo Urbano system, saw use of soil fumigants containing impurities such as 1,2,3-trichloropropane during mid-20th century farming operations.
Connection Between Farming and Water Monitoring
Government sampling efforts under the EPA’s Unregulated Contaminant Monitoring Rule have included this chlorinated solvent to understand its presence and movement in public water systems, revealing how past agricultural activities can link to detectable residues.
2. How This Solvent Moves from Soil to Water Over Decades
Deep Groundwater Transport Delays Detection
TCP, as a chlorinated solvent impurity, moves slowly through soil and rock layers, sometimes appearing in groundwater many years after initial soil fumigation, revealing a lag between source activities and water measurements.
Why Existing Equipment May Struggle
Your household water system may perform well in general, but the unique persistence and behavior of 1,2,3-trichloropropane can challenge standard treatment capabilities when concentrations approach detection thresholds.
3. Prioritizing Water Testing: From Simple Checks to Detailed Laboratory Analysis
Starting with Local Water System Records
The EPA's data for the Arecibo Urbano system found 24 analyses from 2013 to 2016 with zero detections above 0.03 micrograms per liter (µg/L), or parts per billion (ppb), indicating levels below the federal reporting threshold.
Why Testing Your Own Water Still Matters
Your household plumbing and well may introduce unique factors. Comprehensive laboratory testing specifically for 1,2,3-trichloropropane at a certified lab offers the only way to know your water’s actual concentration.
Ordering the Right Laboratory Test
Request analysis targeting low detection limits around 0.03 µg/L to identify any presence of this chlorinated solvent accurately.
4. Understanding the Strict Reporting Level for 1,2,3-TCP
Low Reporting Level Reflects the Chemical’s Profile
The 0.03 µg/L benchmark serves as a reporting threshold rather than a health-based limit, designed to detect this solvent at very low levels due to its chemical nature and persistence in the environment.
How This Differs from Common Metal Thresholds
Unlike metals that often have higher regulatory limits, the very low reporting level for TCP helps track emerging contaminants before standards exist, supporting ongoing water quality protections.
5. What a Certified Lab Test Reports and How to Interpret It
Test Results Will Detail Presence or Absence
Your laboratory report will provide a concentration measurement in micrograms per liter (µg/L). A reported value below 0.03 µg/L means the solvent is not detected at this sensitivity level.
Reading Your Results Within Context
Detected does not imply a violation or unsafe water; it means the chlorinated solvent was measurable by the lab’s instruments. Absence of detection signals levels below the testing threshold.
6. What EPA Monitoring Means and Does Not Mean for Your Water
The Federal Record Shows No Health-Based Violations
According to EPA data, the Arecibo Urbano system has no history of health-based violations related to 1,2,3-trichloropropane, supporting the overall safety of public water in this regard.
Limitations of Area Data for Individual Homes
Regional sampling results cannot define your household water quality. Your unique water source, plumbing, and local characteristics require personalized testing to make informed treatment choices.
Conclusion: The Single Test to Resolve Your 1,2,3-TCP Concerns
Order a certified laboratory analysis focused on 1,2,3-trichloropropane with a detection limit at or below 0.03 micrograms per liter (parts per billion). A result showing levels below this threshold confirms absence of TCP above the reporting level, giving you confidence in your water’s status.
If concentrations warrant treatment beyond your current setup, the Fleck 1,2,3-TCP Filter ships ready to configure, providing a focused solution for this chlorinated solvent, supporting your household’s ongoing water quality needs.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2016-12-11. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Arecibo Urbano (PR0002652), PR: 24 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level

