Autotrol Iron Bacteria & Slime Filter

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1. How Sampling Depth and Well Type Affect What You See in Iron Results

The U.S. Geological Survey collected groundwater samples in Linn County from two wells, each approximately 60 feet deep. These samples represent the local aquifer that supplies water to many residences but do not reflect any individual household’s well. The depth and type of well influence iron presence because iron bacteria often inhabit shallow groundwater zones where iron is dissolved naturally. If your well differs in depth or source, your water's iron bacteria levels could vary significantly.

2. Interpreting 'Detected,' 'Median,' and 'Range' in Linn County Iron Data

In the 17 samples collected from November 2020 through June 2026, iron was detected in 16 results, with one sample below the reporting limit. The median iron concentration was 63.55 micrograms per liter (µg/L), and values ranged from 8.3 to 321.0 µg/L. “Detected” means an instrument measured iron; it is not a health violation. The median represents the middle value of all samples, providing a typical concentration, while the range shows the lowest and highest measured iron levels. These figures help indicate the variability of iron presence in the local aquifer.

3. Understanding Certified Laboratory Reports for Iron and Iron Bacteria

A certified laboratory test for your household water will specify iron concentration in micrograms per liter or parts per billion and may also identify iron bacteria presence. The lab report will detail whether iron is dissolved or particulate and may note bacteria colony counts indicative of iron bacteria. Reading these results lets you confirm your water’s condition rather than relying on general regional data. Only your own test can establish your water’s specific iron bacteria level.

4. Why Public Water System Records and Private Well Tests Differ in Meaning

Public water system records, such as those by the USGS, offer area-wide data reflecting aquifer quality from monitoring wells, not household taps. These records are valuable for understanding regional trends but do not substitute for private well testing. Unlike public systems, private wells are individually influenced by local geology and well construction. Thus, verifying iron bacteria presence and concentration with a certified lab test on your own well water is essential for accurate assessment.

5. Seasonal and Multi-Year Changes in Iron Observed in Linn County Sampling

The sampling data spans over five years, indicating that iron concentrations in the Linn County aquifer have varied across time but stayed within certain bounds. The range from 8.3 to 321.0 µg/L over this period suggests seasonal or environmental factors impact iron levels, such as groundwater flow changes or aquifer chemistry shifts. Recognizing this variation helps set expectations that iron bacteria presence in your water may also fluctuate.

What This Data Does Not Confirm

The government sampling does not establish the iron bacteria level in your household water or whether it causes any issues you may notice. Detection in area wells is not a violation or unsafe by federal standards. For your specific situation, a certified laboratory test of your own well or tap water is necessary to determine if iron bacteria treatment is warranted. If treatment is needed, the Autotrol Iron Bacteria & Slime Filter ships ready to configure and is designed to reduce iron bacteria and associated slime, improving water clarity and protecting household plumbing.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2026-06-23. 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 aquifer (Linn County): 17 results from 2 wells, median 63.55 ug/L, range 8.3-321.0 ug/L; none above any federal threshold