Government sampling by the U.S. Geological Survey in wells within Colleton County's aquifer 111SANDD recorded hardness levels ranging from 5.84 to 395.0 mg/L across six wells sampled between 2018 and 2019. The median hardness was 33.65 mg/L. All results were below any federal threshold. This area-wide data offers a broad understanding but does not establish the hardness of any individual well or water supply.
How Sample and Well Depth Influence Hardness Expectations
The six sampled wells were between 13 and 56 feet deep. Hardness in groundwater can vary with depth and geology, so samples from different depths may show different hardness levels. For commercial operators, this means the hardness in your specific source could differ notably from the reported range, especially if your well is deeper or shallower than those sampled.
Stepwise Approach to Identifying Hardness Issues
Begin by checking for common signs of hardness in your facility’s water, such as scale buildup on fixtures and inefficiency in cleaning processes. Next, conduct a simple field test for hardness if available, then proceed to a comprehensive laboratory test that quantifies calcium and magnesium concentrations. Laboratory testing provides the definitive measurement needed to select an appropriate treatment technology.
Fixtures and Processes Most Sensitive to Hardness
Water-using equipment such as boilers, cooling towers, dishwashers, and laundry machines are usually first impacted by hardness because calcium and magnesium ions form scale deposits. These can reduce equipment efficiency, increase maintenance needs, and shorten lifespan. Commercial operators should prioritize monitoring these points.
Differentiating Aesthetic Secondary Standards from Health-Based Limits
Hardness is governed by secondary standards related to taste, staining, and scaling potential rather than health risks. The federal record for Colleton County’s aquifer 111SANDD confirms no hardness-level results exceeded health-based thresholds. While high hardness can affect operations and aesthetics, it does not indicate a violation or unsafe condition under federal water quality regulations.
Interpreting Certified Laboratory Test Reports for Hardness
A certified lab report for hardness typically lists concentrations of calcium and magnesium in milligrams per liter (mg/L). Review these values relative to your operational tolerance for scaling and equipment specifications. Understanding this data allows informed decisions on whether to pursue treatment and which technologies fit your commercial needs.
In summary, the regional data from Colleton County’s 111SANDD aquifer provides a useful reference but is no substitute for site-specific testing. Commercial operators should proceed through visual inspection, field tests, and ultimately certified laboratory analysis to characterize hardness before selecting equipment.
The 36 Steel Tanks - Triplex Unit Skid, a commercial system skid designed for managing hardness, ships ready to configure. It is a documented solution for operators who confirm through testing that hardness treatment is warranted in their specific water supply.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-11-14. 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 111SANDD aquifer (Colleton County): 6 results from 6 wells, median 33.65 mg/L, range 5.84-395.0 mg/L; none above any federal threshold