Autotrol Iron + Hard Water (Well) System

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Number of Samples and Wells Behind the Iron Data

The iron concentrations reported for Gwinnett County's aquifer 320CRSL come from 13 groundwater samples taken from 9 separate wells. These wells were between 280 and 600 feet deep. This sample size is relatively limited, meaning it provides a snapshot rather than a comprehensive survey of all wells or water qualities in the area. The recorded median iron concentration across these samples was 1300.0 micrograms per liter, with individual results ranging from 4.0 to 2640.0 micrograms per liter.

Seasonal and Multi-Year Variation in Iron Levels

The data span sampling dates from June 10, 2010, to June 18, 2013. The range of measured iron values within this three-year period indicates some variation over time and across different wells. This suggests that iron concentrations in groundwater from this aquifer can fluctuate seasonally, with well depth and local geology likely contributing factors.

Information to Collect Before Seeking Treatment Advice

Before determining the size and capacity of an iron and hardness treatment system for your household, it is important to obtain a recent water test from your own well or tap water source. This test should include iron content and hardness levels specific to your water supply. Knowing the volume of daily water use in your home is also critical to choosing a system rated to handle your household demand effectively.

Distinguishing Aesthetic Secondary Standards from Health-Based Limits

Though all sampled iron concentrations were below federal health-based thresholds, some results exceed secondary aesthetic standards related to taste, staining, and water clarity. These secondary standards are not safety limits but rather guidelines that relate to how water quality affects the look and feel of water and household fixtures. Iron can cause reddish stains and impart metallic taste, which many homeowners find undesirable, justifying treatment even when health risks are not present.

Additional Considerations for Commercial or Industrial Operators

Unlike residential use, commercial and industrial operations may have added requirements such as higher water volume needs, continuous flow rates, or compliance with specific industrial standards. These factors influence system sizing and capacity beyond what residential households require.

Comparing Gwinnett County Iron Data with Neighboring Areas

When looking at iron data from neighboring counties, it is important to avoid assuming that similar regional values will exactly predict local well conditions. Differences in geology, well depth, and sampling times can cause variability in iron content. The Gwinnett County data reflect the specific conditions of aquifer 320CRSL and should be interpreted within that context.

What Not to Conclude from Area Iron Sampling Data

These area-wide data do not establish the iron concentration in any individual well or tap water. A detection or concentration reported here does not mean your water contains the same iron level or that it exceeds any safety limits. To accurately size treatment for iron and hardness in your home, testing of your own water supply is indispensable.

For households in Gwinnett County dealing with iron and hardness, a suitable option is the Autotrol Iron + Hard Water System. This system ships ready to configure and offers a grain capacity of 32,000, appropriate for many residential water treatment needs. Proper sizing depends on your water test results and daily water usage to match system capacity with demand effectively.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2013-06-18. 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 320CRSL aquifer (Gwinnett County): 13 results from 9 wells, median 1300.0 ug/L, range 4.0-2640.0 ug/L; none above any federal threshold