The U.S. Geological Survey has collected data on nickel concentrations in groundwater from aquifer 112CHCTU, which underlies Lafayette Parish, LA. Their sampling covered 31 wells, ranging 11 to 250 feet deep, with 56 test results recorded between 2011 and 2021. Nickel was detected in every result, ranging from 0.24 to 18.0 micrograms per liter (ug/L), with a median level of 1.85 ug/L. No results in this dataset exceed any federal health thresholds.
Reading Certified Laboratory Water Tests for Nickel
What a laboratory test report includes
A certified lab test for nickel reports the concentration of nickel in micrograms per liter (ug/L) or parts per billion (ppb). This precise measurement indicates how much nickel is dissolved in the water tested. The report often includes a detection limit, below which nickel cannot be reliably measured.
Interpreting detected values
Detection means the instrument measured nickel at a level above the reporting threshold. It is not a violation or a safety finding, only an analytical result. Concentrations below any established taste or secondary standards are common and not a health concern.
Understanding Detected, Median, and Range in the Government Record
Detected in all 56 samples
Every sample taken showed nickel present at some concentration, indicating nickel is naturally occurring or introduced in this aquifer area.
Median value represents the typical concentration
The median nickel concentration of 1.85 ug/L means half the samples were below this level and half were above. It gives a central tendency for the area but not a precise value for any individual well.
Range shows variability in the area
Nickel concentration ranged from very low at 0.24 ug/L to a higher concentration up to 18.0 ug/L in some wells, illustrating natural variability or differing local conditions.
Comparing Lafayette Parish Nickel Levels with a Neighboring County
Use consistent data sources and aquifers
Comparing nickel data across adjacent areas requires data from the same aquifer type and sampling methodology. Differences may reflect geology or land use.
Beware overinterpretation of single values
A single high or low measurement should not be taken as representative. Look at medians and ranges to understand broader trends.
Influence of Sample Depth, Well Depth, and Source Type
Nickel concentration may vary with depth
Sampling in wells from 11 to 250 feet deep means nickel results cover a range of groundwater zones. Shallower or deeper wells may have different nickel levels.
Water source type affects nickel expectations
Groundwater from private wells can differ from municipal supplies or surface water. Knowing the source helps determine if nickel is naturally occurring or influenced by human activities.
How Treated Water Differs at the Tap with an Autotrol Heavy Metals Filter
Specialized filtration targets heavy metals
The Autotrol Heavy Metals Filter uses a specific system designed to reduce dissolved nickel and related metals effectively, improving household water quality.
Water post-treatment shows reduced metal concentrations
Water passing through this filter typically has lower nickel content, which may improve taste, reduce staining, and address concerns over metal presence.
Worked Example: Applying Area Data to a Homeowner's Situation
Using the median and range for household understanding
If your well taps into the Lafayette Parish aquifer 112CHCTU, the nickel concentration in your water is likely within the observed range of 0.24 to 18.0 ug/L, with most values near 1.85 ug/L. To know your specific level, you need a certified laboratory test on your water sample.
Interpreting your lab results
Your test report will state the nickel concentration. If it falls within or near the area range and below any health-based thresholds, the government data suggests typical regional levels. If your concentration is higher, considering filtration technologies like the Autotrol Heavy Metals Filter can help reduce metal content.
Final Recommendation: Testing Your Household Water for Nickel
The key step is obtaining a certified laboratory test specifically for nickel in your own household water supply. This test will clearly establish your water’s nickel content and help decide if treatment is needed. If the test shows nickel near or above the typical range observed in Lafayette Parish groundwater, using the Autotrol Heavy Metals Filter system, which ships ready to configure, offers an effective option to improve your water quality at the tap.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2021-07-22. 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 Nickel in the 112CHCTU aquifer (Lafayette Parish): 56 results from 31 wells, median 1.85 ug/L, range 0.24-18.0 ug/L; none above any federal threshold
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