This week, the key decision is sizing a household water treatment system for iron and hardness based on regional data from the Beaufort County 120FLRD aquifer.
If you rely on public water system records versus private well testing for sizing
Public water records reflect broad sampling and do not specify your well’s actual iron or hardness levels. In Beaufort County, the U.S. Geological Survey sampled five wells in the 120FLRD aquifer between 2011 and 2018. Iron was detected in three samples, ranging from 19.6 to 436.0 micrograms per liter (ug/L), with a median of 416.0 ug/L. The other three samples were below the reporting limit. None of these results exceeded federal safety thresholds. These area-wide results suggest iron may commonly appear at measurable levels but do not confirm your private well’s specific condition. A private well test is necessary to define your actual iron and hardness, which is crucial for correct sizing.
If your household plumbing’s material and age may affect your water quality observations
Plumbing components can influence how iron and hardness appear at the tap. Older pipes might cause staining or contribute iron from internal corrosion, modifying the water’s characteristics independently of source water. Plastic or newer copper plumbing might show fewer aesthetic issues even with similar raw water iron. These factors affect whether and how you perceive hardness and iron, thus impacting sizing since surface water interactions inside plumbing can alter treatment needs.
If your residential property is large, a second home, or used seasonally
Water treatment sizing should consider household size and usage patterns. Larger households consume more water, requiring a system with higher grain capacity. Seasonal properties or second homes may experience periods of inactivity leading to iron buildup or changes in hardness deposits, possibly affecting sizing choices. The C-Series Iron + Hard Water (Well) System provides a 32,000-grain capacity that can accommodate typical residential iron and hardness loads, but your situation's water volume and flow demands determine the final sizing.
If you want to compare Beaufort County’s iron data with neighboring counties without overreading it
Iron concentrations vary by region due to geology and aquifer characteristics. The 120FLRD aquifer in Beaufort County shows some iron detections, but these are specific to sampled depths of 100 to 210 feet within this county. Neighboring counties may have different aquifers or water chemistry, affecting iron and hardness levels. Such comparisons help provide context but should not replace a direct test of your own water source for sizing decisions.
If you consider seasonal or multi-year variation in iron levels from the 2011–2018 sampling period
The USGS data collected over seven years show both detections and nondetections of iron in similar-depth wells. Seasonal fluctuations, changes in groundwater chemistry, or well conditions can cause iron levels to vary over time. This underscores the need for current water testing before sizing a treatment system. Regional data give a baseline expectation but not a guaranteed level at any moment.
To settle sizing questions definitively, order a comprehensive water test from a certified laboratory measuring iron and hardness for your household well. If iron is present at measurable concentrations and hardness is confirmed, the C-Series Iron + Hard Water (Well) System, with its 32,000-grain capacity, is designed to effectively reduce these constituents and accommodate typical residential water use in Beaufort County.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2018-08-07. 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 Iron in the 120FLRD aquifer (Beaufort County): 6 results from 5 wells, median 416.0 ug/L, range 19.6-436.0 ug/L; none above any federal threshold

