What do 'detected', 'median', and 'range' mean in the Webster Parish water sampling record?
The U.S. Geological Survey measured pH in groundwater from nine wells in the Webster Parish aquifer 124SPRT area between 2010 and 2014. The term 'detected' here means that pH values were recorded for all 44 samples; none were below the level measurement could detect. 'Median' refers to the middle pH value when all samples are arranged from lowest to highest, which was 7.9 standard units, indicating neutral to slightly alkaline water typical for the area. The 'range' shows the lowest and highest pH recorded—5.7 to 8.5 standard units—which reflects natural variability and includes occasional acidic readings below 6.5. This range is important to understand normal fluctuations, not an indication of violations or hazards.
How can I interpret the median and range as a Webster Parish homeowner?
If you imagine lining up all 44 sampled pH results, half would fall below 7.9 and half above. Most readings were comfortably within the EPA’s secondary standard range of 6.5 to 8.5, which is about aesthetics and preventing corrosion. Two readings fell below 6.5, indicating occasional acidic water presence in some wells at varying depths from 80 to 640 feet. This means your well could, but does not necessarily, experience low pH water at times. The sampling does not guarantee your water’s pH; only your own water test can determine your home's exact condition.
What does seasonal or multi-year variation look like in the Webster Parish pH record?
The sampling dates span over four years, from early 2010 to late 2014, allowing observation of pH variation over time. The recorded range shows acidic pH did appear occasionally across this period but was uncommon. This suggests that low pH water presence is irregular rather than a continuous feature of the aquifer. Understanding these fluctuations can help you decide if treatment is needed all the time or only during specific conditions.
What household symptoms might indicate acidic water, and what symptoms do not?
Water with low pH can cause metal plumbing to corrode faster, leading to metallic taste or staining of fixtures. You might notice blue-green stains on faucets and sinks or dulling of metal surfaces. However, symptoms like cloudiness, unusual odors, or discoloration have other causes and do not necessarily mean acidic water is the issue. Testing your water specifically for pH is the only way to confirm acidity as a factor.
Which fixtures or appliances would be affected first by acidic water, and why?
Fixtures made of metal, such as copper pipes, faucets, and water heaters, are most vulnerable to acidic water. Acidic conditions can accelerate metal leaching and corrosion, potentially shortening appliance life. Areas where water is heated may show effects sooner due to increased reaction rates. Appliances using water continuously, such as dishwashers or washing machines, could also be at higher risk of damage or inefficiency if acidic water is present.
To address acidic water, you may consider the Fleck Acidic / Low-pH Water Filter, which ships ready to configure for household use and is designed to manage low pH by neutralizing acidity effectively. Choosing this system depends on your measured water pH and household water use demands.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2014-11-20. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.
On record: U.S. Geological Survey sampling of pH in the 124SPRT aquifer (Webster Parish): 44 results from 9 wells, median 7.9 standard units, range 5.7-8.5 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 2 of 44 sampled results fell below 6.5
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