The U.S. Geological Survey has documented hardness levels in Mason County’s aquifer through groundwater samples collected from two wells between October 2022 and July 2025. These 20 samples, taken at depths of 10 to 22 feet, showed hardness concentrations ranging from 281.0 to 334.0 mg/L, with a median value of 303.5 mg/L. None of these results exceeded federal thresholds. This data describes general water conditions in the area aquifer but does not define the specific quality of any individual residential well.
If your well is shallower or deeper than the sampled range
Sampling in Mason County occurred from 10 to 22 feet below ground, which covers shallow portions of the aquifer. Wells deeper than 22 feet may encounter different water characteristics, potentially with varying hardness or rust presence due to geological factors. Conversely, very shallow wells may have less influence from the aquifer or more surface water impact. Because the hardness levels can vary with depth, testing your well water directly is essential for accurate assessment.
If your concern involves aesthetic secondary standards versus health-based limits
Hardness is regulated only by secondary standards focused on factors like taste, staining, and buildup—not health risks. The levels found in Mason County, although elevated, do not violate any federal drinking water health-based limits. This means that while hardness and rust can cause plumbing issues, appliance wear, and water appearance changes, they are not indicators of contamination requiring health-related action under federal rules.
If you are preparing information before seeking water treatment advice
Before considering any system to address hardness and rust, note the following about your water:
- Obtain an independent laboratory test of your well water hardness to compare against regional data.
- Document the presence and appearance of rust or staining in your water supply.
- Record your well depth and construction details if available.
- Track daily water usage to understand system sizing needs.
If you want to evaluate treatment system capacity for your household's water demand
The C-Series Well Rust + Hardness System offers a grain capacity of 32,000 grains, suitable for residential applications with typical daily water use. To determine if this matches your demand, calculate your household’s total hardness grain load based on water consumption and hardness concentration from testing. Systems sized appropriately prevent frequent regeneration, extending equipment life and maintaining water quality.
If your household is a large family, a second home, or seasonal property
For larger households, increased water use requires treatment solutions with higher capacity or more frequent servicing cycles. Seasonal homes may experience water quality changes due to stagnation or temperature variations during vacancy. Planning for these factors by matching system capacity and maintenance schedules to usage patterns helps ensure reliable treatment performance throughout the year.
The government data referenced comes from systematic groundwater sampling in Mason County aquifer wells 10 to 22 feet deep, collected by the U.S. Geological Survey from October 2022 through July 2025. For detailed regional water quality information, visit the USGS site at waterdata.usgs.gov.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-07-29. 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 aquifer (Mason County): 20 results from 2 wells, median 303.5 mg/L, range 281.0-334.0 mg/L; none above any federal threshold