Documenting Iron Levels in St. Louis County’s Aquifer 111ALVM
The U.S. Geological Survey sampled groundwater in St. Louis County’s aquifer 111ALVM, finding iron concentrations consistently detected in all samples taken from two separate wells at depths between 25 and 80 feet. Median results recorded 5420 micrograms per liter, with a range spanning from 4580 to 6200 micrograms per liter. None of these iron levels exceeded any federal threshold. These figures represent the local aquifer’s conditions rather than any individual household’s water.
Key Information to Note Before Seeking Treatment Options
Before considering any approach to address iron bacteria in residential water, write down the following:
- The date and source of your well water testing results.
- Whether your water shows visible signs of iron bacteria, such as reddish-brown slime or staining.
- Details about any previous treatment equipment and the nature of its failure.
- The depth and type of your well, if known.
- Any recent changes in water quality or flow.
Having these details helps clarify your specific situation when evaluating treatment choices.
Comparing St. Louis County’s Iron Data With Neighboring Areas
Nearby counties might show different iron levels in groundwater samples, but interpreting these differences requires care. Variation can arise from geological diversity, well depth, or sampling methods. A higher median in a neighboring county doesn’t necessarily mean your water is worse or safer. Similarly, St. Louis County’s results reflect area-wide conditions, not individual wells. Use regional data as context, not a direct measure of your home’s water quality.
Commercial or Industrial Operators: Additional Considerations
Compared to households, commercial and industrial users typically assess larger volumes and may face stricter performance demands on water quality. They must consider:
- Consistent removal rates for iron bacteria to protect equipment longevity.
- Impact on processes sensitive to biofouling or mineral deposits.
- Regulatory compliance obligations beyond household standards.
Households generally need simpler, practical solutions focused on appearance, taste, and plumbing health.
Interpreting the Median and Range as a Homeowner
The median iron concentration of approximately 5420 micrograms per liter indicates the typical measure found during sampling, while the range (4580 to 6200 micrograms per liter) shows natural variation between different wells. This means iron bacteria presence is a consistent feature of the local aquifer. However, your well’s actual iron content can differ and should be confirmed by an individual test. The detected iron levels are not health-based violations but may cause staining and slime buildup.
Consequences of Untreated Iron Bacteria Over Time
When iron bacteria remain unmanaged for years, homeowners often notice reddish-brown staining on fixtures and laundry, slime deposits inside pipes, and reduced water flow due to clogging. These effects can increase maintenance needs and harm plumbing components. Although not a safety hazard, untreated iron bacteria can degrade water aesthetics and household convenience.
Reading Certified Laboratory Test Reports for Iron
A certified lab test for iron bacteria or total iron typically reports concentration in micrograms per liter (ug/L). Look for:
- Measured values compared to detection limits — any reported number indicates detected iron presence.
- Whether results exceed aesthetic secondary standards, which affect taste and staining but are not health limits.
- Comments from the lab about testing methods or sample conditions.
These reports provide precise information about your water’s iron content, essential for selecting appropriate treatment.
What St. Louis County Data Does Not Reveal About Your Water
The area sampling data does not specify your individual well’s iron bacteria level or guarantee your water’s quality. Detection in the aquifer does not equal a violation or unsafe water. Only a direct test of your water can establish conditions in your home. While the Fleck Iron Bacteria & Slime Filter ships ready to configure and can address iron bacteria issues effectively for households with previous equipment failures, choosing any treatment should follow thorough testing and informed decision-making.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2013-11-07. 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 111ALVM aquifer (St. Louis County): 4 results from 2 wells, median 5420.0 ug/L, range 4580.0-6200.0 ug/L; none above any federal threshold