Crawford County in Arkansas receives water to taps primarily from groundwater drawn from aquifer 110ALVM. This aquifer serves multiple wells across the area and is subject to ongoing monitoring by the U.S. Geological Survey (USGS) to characterize water quality aspects influencing commercial operations such as dishwashing.
If you have a certified laboratory test report for calcium and magnesium concentrations
Laboratory results for calcium and magnesium—key contributors to what is commonly called water's "hardness"—indicate the levels in milligrams per liter (mg/L). These tests quantify how much calcium and magnesium dissolved in water potentially cause spotting on dishes after washing. Understanding the concentration values helps determine if water treatment measures to reduce spotting might be required.
If you want to know the reliability of aquifer data from Crawford County
The available data covers 10 separate wells sampled over two days in July 2010, as recorded by the USGS. Although this is a modest set, it provides a median calcium-plus-magnesium hardness of 378.5 mg/L, with observed values ranging from 219.0 to 439.0 mg/L. This range reveals variability among wells and suggests water quality can differ depending on the exact groundwater source.
If you wonder about seasonal or annual variation in water hardness
The USGS samples for this aquifer were collected in a concentrated period during mid-July of 2010, limiting direct information on seasonal or multi-year changes. Without repeated sampling across different seasons or years, it is not possible to confirm how hardness varies over time, making a current, local laboratory test essential for precise information.
If you are considering steps before requesting a commercial water treatment quote
- Start by observing the dishwashing process and spotting patterns to confirm the problem is consistent.
- Obtain a certified laboratory report for calcium and magnesium concentrations from the specific water supply feeding your commercial operation.
- Exclude other causes such as detergent formulation, rinse water temperature, and dish-rinse timing.
Laboratory testing for the hard water minerals is necessary because government sampling only reflects area-wide patterns, not the exact water feed to your operation.
If you want to understand how calcium and magnesium enter groundwater in Crawford County
In aquifer 110ALVM, calcium and magnesium primarily originate from dissolution of local geological formations containing carbonate minerals. As water percolates through soil and rock, these minerals dissolve, increasing hardness levels in the groundwater extracted by wells. This process is natural and common in regions with limestone or dolomite bedrock.
If you look to interpret the median and range of hardness as a commercial operator
The median concentration of 378.5 mg/L indicates that half of the sampled wells had hardness above this level and half below. The broad range from 219.0 to 439.0 mg/L means some wells can have notably softer or harder water compared to the median. For commercial dishwashing, higher hardness typically correlates with more visible spotting if untreated.
Given this information, you should arrange testing of your specific water source. If hardness is confirmed at levels likely to cause spotting issues, commercial water softening equipment such as the Nelsen 210,000 Grain Skid-Mounted Commercial Water Softener can address calcium and magnesium effectively, reducing spots on dishes.
This summary relies solely on the USGS groundwater sampling data from Crawford County's aquifer 110ALVM collected in July 2010, available at the official government water data website.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2010-07-14. 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 Hardness, Ca, Mg in the 110ALVM aquifer (Crawford County): 10 results from 10 wells, median 378.5 mg/L, range 219.0-439.0 mg/L; none above any federal threshold