How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means?
The City of Biloxi’s water supply serves over 23,000 residents through more than 9,300 connections, drawing from groundwater sources. The Environmental Protection Agency (EPA) monitored this system under the third Unregulated Contaminant Monitoring Rule (UCMR3) between 2013 and 2015. During this period, 26 to 27 samples were collected for various volatile organic compounds (VOCs). These results are system-wide and not tied to any specific household or tap. Because of the relatively small number of samples, these figures represent snapshots rather than continuous monitoring. They indicate whether VOCs have been detected in the water system but do not establish levels at individual homes.
Why Aesthetic Secondary Standards Differ from Health-Based Limits, Applied to This Constituent
The EPA distinguishes between health-based limits, which pertain to potential health risks, and aesthetic secondary standards, which relate to taste, odor, or staining characteristics. For the Biloxi water system, no health-based violations have been recorded. VOC measurements in the area lack Maximum Contaminant Levels (MCLs) because these compounds were monitored under an unregulated rule. This means detections above reporting levels indicate presence but are not regulatory exceedances or safety concerns. Effects such as taste or minor odors may arise at certain concentrations but do not imply health hazards.
How Seasonal or Multi-Year Variation Shows in the Record (Dates and Ranges Given)
The UCMR3 data cover a time span from early 2013 to mid-2015, reflecting periodic measurements rather than continuous tracking. Some VOCs such as chloromethane were detected twice above reporting levels, with values ranging up to about half a microgram per liter. Others, including 1,1-dichloroethane, bromomethane, HCFC-22, 1,3-butadiene, and MTBE, showed no detections above reporting thresholds. This variation over the sample period suggests that VOC presence in the Biloxi system fluctuates but generally remains low.
How the Documented Treatment Technology Removes or Neutralises the Constituent
Addressing VOCs in drinking water often involves advanced filtration or adsorption technologies capable of reducing these compounds effectively. One documented option is the Pentair VOCs & Industrial Chemicals Filter. This system uses targeted media designed to adsorb VOC molecules, lowering their concentration as water passes through. It operates at the point of use, shipping ready to configure for household plumbing, enabling residents to reduce VOC content directly at their taps.
A Worked Example: Reading the Record's Median and Range as a Homeowner Would
Consider chloromethane detections in the Biloxi system, where two samples measured above 0.2 micrograms per liter reporting levels, with the highest near 0.575 micrograms per liter and a median of detections around 0.485 micrograms per liter. A homeowner might interpret this as occasional, low-level occurrence within the system overall. Given there are no federal MCLs for chloromethane and no health-based violations noted, these figures suggest presence without regulatory concern. Testing your own home's water would be the only way to determine if similar levels appear at your tap.
Which Fixtures, Appliances or Processes Are Affected First and Why
VOCs dissolved in water can affect fixtures and appliances that use water directly, particularly those involving heating or aeration. For example, water heaters or humidifiers may release VOCs into indoor air, and appliances like coffee makers or ice machines might concentrate these compounds. Cold water taps used for drinking or cooking can also introduce VOCs when present. Therefore, targeting filtration at these points of use can provide the most immediate reduction in VOC exposure.
To address VOC presence effectively in Biloxi household water, the Pentair VOCs & Industrial Chemicals Filter offers a documented treatment solution. It ships ready to configure and adapts to your household water demand measured through testing, helping you manage VOCs where you need it most.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-05-05. 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 Biloxi (MS0240001), MS: 183 results across 7 listed contaminants, 3 detections above the reporting level; no federal MCL for these UCMR-listed VOCs
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