Local Water Supply Overview
Columbia County, Arkansas, receives its public water primarily from surface water sources served by Magnolia Waterworks. This system provides water to over 11,000 residents through more than 5,000 connections. The surface water is treated and delivered to taps, where the water quality may be affected by various volatile organic compounds (VOCs) present in the watershed.
Differences Between Gasoline and Dry-Cleaning VOC Releases
Gasoline Release Signatures
Gasoline-related contamination typically includes compounds from fuel additives and combustion byproducts. These VOCs can include substances like MTBE, although Magnolia Waterworks’ monitoring found no MTBE above reporting thresholds.
Dry-Cleaning Solvent Compounds
Dry-cleaning operations release different solvent VOCs such as 1,1-dichloroethane and 1,3-butadiene. According to EPA monitoring from 2013-2015, none of these solvents were detected above reporting levels in the system’s water supply.
Long-Term Effects If VOCs Persist Without Control
Potential Stains and Taste Changes
While no health violations appear in the system's records, persistent VOCs can cause aesthetic issues such as taste or odor changes over time.
Impact on Treatment Equipment Performance
Existing residential water-treatment devices may become less effective if VOC concentrations fluctuate or increase, requiring upgrades or enhancements designed for VOC removal.
Sample Sizes and Data Interpretation
Number of Samples Collected
Magnolia Waterworks had 8 to 10 samples analyzed per VOC during the EPA’s Unregulated Contaminant Monitoring Rule period.
Interpreting Non-Detection Results
Non-detection means the VOC concentrations were below established reporting levels (e.g., 0.03 µg/L for 1,1-dichloroethane), not that the compounds are entirely absent.
Seasonal Movement of VOC Plumes
Water Table Variations
Changes in the water table can cause VOC plumes to shift vertically and laterally relative to well intake zones, influencing concentrations detected in samples.
Effect on Residential Well Screens
Wells screened at different depths may record different VOC levels depending on the plume’s seasonal position, affecting treatment needs.
Water Quality After Using a Specialized VOC Filter
Reduction of Volatile Organics
The C-Series VOCs & Industrial Chemicals Filter targets a broad range of volatile organic compounds, including solvents, to reduce residual VOCs in treated water.
Compatibility With Existing Equipment
This filter ships ready to configure with most home water systems to supplement performance where current devices are insufficient.
Next Steps for Homeowners
The key step to understand household VOC exposure is to conduct a lab test specifically analyzing for volatile organic compounds in your home’s water supply. A comprehensive VOC panel will identify the presence and concentration of solvent compounds, settling whether your current equipment meets treatment needs or if an advanced solution like the C-Series system is warranted.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-09-10. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Magnolia Waterworks (AR0000109), AR: 58 results across 7 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level