Area Water Data and What It Means for Your Home
Government monitoring of the Marco Rural Water Company serving Marion, SC, provides valuable insights into 1,2,3-trichloropropane (1,2,3-TCP) in the local water supply. However, these results reflect the system as a whole and do not indicate the 1,2,3-TCP concentration within an individual household’s water. To know your home's exact water quality, you would need a certified laboratory test performed on a sample from your tap.
How California's 5 ng/L State Limit Compares With the Absence of a Federal MCL
California’s 5 ng/L (0.005 µg/L) threshold
California has set a notification level of 5 nanograms per liter (ng/L), or 0.005 micrograms per liter (µg/L), for 1,2,3-TCP, which is more stringent than federal guidelines.
No federal maximum contaminant level (MCL)
The Environmental Protection Agency has not established a federal MCL for 1,2,3-TCP. Therefore, monitoring results, such as those from Marco Rural Water Company, are not violations and do not establish unsafe conditions.
Granular Activated Carbon Contact Time: Why Bed Depth Matters More for TCP Than for Taste
Enhanced filtration requires sufficient contact
1,2,3-TCP, a chlorinated solvent, requires granular activated carbon (GAC) filtration designed with adequate bed depth to ensure sufficient contact time. This differs from treatment focused mainly on aesthetic concerns like taste or odor, where contact time can be shorter.
Longer bed depth improves chlorinated solvent interaction
Effective reduction of TCP depends on the time water spends in contact with the carbon media. Deeper carbon beds increase this contact time and improve the treatment’s capacity to address the chlorinated solvent.
What Happens When This Problem Is Left Untreated for Years, Stated Without Exaggeration
TCP persistence in groundwater
1,2,3-trichloropropane can persist in groundwater for many years due to its chemical stability and slow degradation.
Potential accumulation in household plumbing
While TCP itself is not removed by boiling or softening, leaving any detectable chlorinated solvent untreated could result in its presence at the tap over time, underlining the importance of verifying water quality.
How to Compare This Area's Record With a Neighbouring County's Without Overreading It
Variability in detection levels
Neighboring counties may report detections of 1,2,3-TCP that differ due to sampling times, water sources, and monitoring scope. These differences do not indicate that one area’s water is safer or riskier than another’s without individual testing.
Context of monitoring data
Sampling programs like the EPA's Unregulated Contaminant Monitoring Rule provide a snapshot rather than a constant record, so data interpretation should consider this limited scope.
A Worked Example: Reading the Record's Median and Range as a Homeowner Would
Marco Rural Water Company’s monitoring from 2013-2015
- 14 samples for 1,2,3-TCP all below the reporting level of 0.03 µg/L (30 parts per trillion)
- This means no measurement was high enough to be quantitatively reported
Interpreting the data
As a homeowner, this means the presence of 1,2,3-trichloropropane in the public supply for Marion was not detected above the minimum reporting threshold during the survey period.
How the Treated Water Differs at the Tap Once the Documented Technology Is in Place
Introducing specialized filtration
The Fleck 1,2,3-TCP Filter, which ships ready to configure, utilizes granular activated carbon media designed to target the chlorinated solvent effectively.
Impact on water quality
With proper flow conditions, this filtration approach reduces the concentration of 1,2,3-trichloropropane at the tap, providing peace of mind for homeowners concerned about this compound in their water.
Conclusion
For Marion residents uncertain about the severity of 1,2,3-TCP in their home water, the Marco Rural Water Company’s monitoring record shows no detections above the reporting level. To confirm your household’s water quality, a laboratory test of your tap water is needed. When additional treatment is desired, the Fleck 1,2,3-TCP Filter offers a documented technology designed around contact time and media to address this chlorinated solvent effectively.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2013-10-29. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Marco Rural Water Company (SC3320001), SC: 14 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level