Government groundwater sampling in Brown County’s aquifer 112DRFT found iron concentrations detected at around 6.1 micrograms per liter as a median among tested wells. This offers a regional snapshot, not a direct measure of any specific household’s water supply.
How do those median and range numbers relate to my household’s experience with iron and rust?
The sampling included eight results from six separate wells, with iron detected in half of those results at levels from 5.4 to 7.2 micrograms per liter. This median and range show what instruments measured in that region’s groundwater over a two-week span in August 2011. Water at these levels might produce mild iron staining or rust-colored water, but individual well tests are necessary to determine the actual concentrations in your home’s supply, which could be higher or lower.
Could the plumbing materials and age in my home affect the iron and rust I see, independent of the aquifer data?
Yes. Iron staining and rust can originate from corrosion of older pipes and fixtures, especially if plumbing materials include cast iron or steel. Even with low iron levels in source water, oxidizing iron compounds from plumbing can cause rust-colored water. Identifying whether stains come from source water iron or pipe corrosion requires testing at different points and inspecting your plumbing condition.
Does this Brown County iron sampling show seasonal or multi-year variations that impact iron and rust problems?
The data covers groundwater samples collected only within August 4–19, 2011, so it does not provide insight into seasonal or long-term changes. Without other data points across seasons or years, it is not possible to determine how iron concentrations fluctuate over time in aquifer 112DRFT. Homeowners should consider periodic water tests to detect any changes in iron levels affecting their household.
How does the Pentair Orange Iron & Rust Stains Filter address iron-related water problems?
This system focuses on reducing iron concentrations and neutralizing iron compounds that cause rust stains by filtering water before it reaches taps and appliances. By targeting iron particles and dissolved iron, it can significantly reduce staining and discoloration issues in household water. The equipment ships ready to configure and connects with your existing water setup to provide ongoing treatment.
What exactly do the terms 'detected,' 'median,' and 'range' in this sampling record mean for me?
- Detected: Iron was measured in four of eight results, meaning instruments confirmed its presence but not necessarily at problematic levels.
- Median: The middle value of iron concentrations in all detected samples, providing a central tendency estimate for that area’s groundwater.
- Range: The span from lowest to highest detected iron values in those samples, showing variability between wells or measurements.
These terms describe observed data only and do not determine if your water is good or bad without testing your specific supply.
How can I distinguish iron and rust issues from other common water discoloration problems?
Iron and rust problems are commonly mistaken for manganese staining or sediment presence. Manganese also leaves dark staining but behaves differently chemically and requires different treatment approaches. Sediment often causes cloudiness or particles but does not cause rust coloring. Determining the cause requires water testing and sometimes physical inspection of water flow or fixtures.
For Brown County households facing persistent iron and rust, the Pentair Orange Iron & Rust Stains Filter offers a proven approach to improve water clarity and protect plumbing. After identifying your household water’s iron demand through testing, consider this system to address iron-based staining effectively.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2011-08-19. 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 112DRFT aquifer (Brown County): 8 results from 6 wells, median 6.1 ug/L, range 5.4-7.2 ug/L; none above any federal threshold

