Fleck Orange Iron & Rust Stains Filter

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How Iron Enters Groundwater in Gwinnett County's 320CRSL Aquifer

Iron is a naturally occurring element found in many groundwater systems, including the 320CRSL aquifer beneath Gwinnett County, Georgia. It typically dissolves from iron-bearing minerals in soil and rock layers and enters the water as it moves underground. The U.S. Geological Survey sampled nine wells between 280 and 600 feet deep in this area from 2010 to 2013, detecting iron in all 13 samples. These findings confirm the presence of iron in regional groundwater but do not specify amounts present in any single household’s water.

Distinguishing Iron and Rust from Other Common Water Coloration Issues

Not all reddish or brown discoloration in water results from iron. Some water color changes can arise from organic material or manganese, which can produce similar staining yet require different approaches for treatment. Iron particles often cause rust-colored staining on fixtures and laundry, a visual cue to iron presence. In contrast, manganese may cause darker, blackish stains. Understanding these differences helps avoid misdiagnosis and directs appropriate water testing and treatment choices.

Comparing Gwinnett County’s Iron Data with Neighboring Counties—Avoiding Overinterpretation

While Gwinnett County’s samples show a median iron concentration of 1300 micrograms per liter and a range from 4 to 2640 micrograms per liter, nearby regions may have different median or range values. However, these variations reflect regional geology rather than individual household conditions. Attempts to extrapolate these area-wide figures to a specific home’s water without testing can result in inaccurate assumptions about water quality.

The Role of Plumbing Material and Age Separate From Source Water

Sometimes rust-like discoloration is influenced or exacerbated by household plumbing materials and their age. Older iron or steel pipes can corrode internally, releasing rust particles into water regardless of source water iron levels. Copper pipes, plastic pipes, and modern plumbing materials typically do not contribute to rust stains. Therefore, water discoloration at the tap can be partially related to plumbing conditions rather than groundwater alone.

What the Measured Iron Range Means Against Federal Standards—and What It Does Not Mean

The U.S. has no federal maximum contaminant level specifically for iron in drinking water because iron is not considered a health risk at typical concentrations. Instead, secondary standards address aesthetic concerns such as staining and taste. The iron levels detected in Gwinnett County wells do not exceed any federal health-based thresholds; detection simply means iron is present. However, these measurements do not imply any health hazard or legal violation for municipal or private water supplies.

The Test to Order and How It Resolves Your Water Quality Questions

To determine if iron is responsible for your household water discoloration or staining, a certified laboratory iron analysis of your specific water source is necessary. This test will quantify iron concentration uniquely in your water, distinguishing it from regional data and clarifying whether treatment is beneficial. If iron is confirmed at levels causing rust stains, the Fleck Orange Iron & Rust Stains Filter ships ready to configure and is designed to address these issues effectively, improving water clarity and preventing staining.

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