Government groundwater sampling in Gallatin County, Illinois, focused on the aquifer 110QRNR, has consistently detected iron in multiple wells. Between June 2015 and August 2019, 10 samples from 8 different wells ranging from 60 to 135 feet deep showed iron levels between 727 and 3090 micrograms per liter (ug/L), with a median of 2685 ug/L. None of these iron measurements exceeded any federal standard.
Interpreting Iron Bacteria-Related Iron Levels and Federal Standards
It is important to understand that federal standards do not set a maximum contaminant level specifically for iron in water supplies. The detected iron levels in this aquifer are below any enforceable federal threshold. Detecting iron is common and not in itself a health violation. However, elevated iron can support the growth of iron bacteria, which form slimy deposits that damage water systems and impact water quality.
Assessing Household Treatment Capacity for Iron Bacteria
Treatment measures for iron bacteria must match the household's daily water use. Residential water demand varies but typically ranges between 50 to 100 gallons per person daily. Knowing your household's specific water use helps to select a treatment system that handles both volume and iron concentrations comparable to those documented in Gallatin County's aquifer records.
Water Quality Changes After Treatment with a Specialized Filter
When water is processed through a Pentair Iron Bacteria & Slime Filter system, the technology reduces iron bacteria presence and the associated slime deposits. This results in clearer water that flows more freely through pipes and fixtures, with less buildup causing blockages or discoloration. The filter ships ready to configure in residential settings, providing an effective barrier against iron bacteria’s impact on household water systems.
Practical Interpretation of Local Iron Data for Homeowners
Consider the median iron concentration of 2685 ug/L reported in the area aquifer samples. While this figure is not a direct measurement of your home's water, it indicates that iron presence is typical in the local groundwater. The sample range from 727 to 3090 ug/L shows variability between wells but no exceedance of federal limits. If your existing equipment has failed, treating water with documented iron bacteria mitigation technology designed for similar iron levels may restore quality and system function.
Understanding Certified Laboratory Testing for Iron
A certified laboratory test specific to iron will report the concentration in micrograms per liter (ug/L) or parts per billion (ppb). This numeric value allows comparison with regional data and helps confirm whether your water aligns with local groundwater characteristics. Laboratory results do not diagnose iron bacteria presence directly but quantify iron, a key factor in iron bacteria growth risk. Regular testing informs ongoing water management decisions.
In summary, the U.S. Geological Survey’s sampling in Gallatin County’s 110QRNR aquifer identified iron in all sampled wells, with no federal standard exceedances. This provides a regional water quality reference for residential households considering treatment for iron bacteria effects. More information and the data source are available from the U.S. Geological Survey groundwater monitoring site.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-08-08. 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 110QRNR aquifer (Gallatin County): 10 results from 8 wells, median 2685.0 ug/L, range 727.0-3090.0 ug/L; none above any federal threshold
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