Understanding Detected, Median, and Range in Regional Water Sampling
In Linn County's aquifer 111ALVM, the U.S. Geological Survey collected 246 water samples from 16 wells between March 2010 and June 2026. Among these, iron was detected in 165 results, while 81 results showed levels below the reporting limit. The median iron concentration across all samples was 54.8 micrograms per liter (ug/L), with individual results ranging from 3.5 to 800.0 ug/L. These figures describe the spread and frequency of iron presence in the regional groundwater but do not indicate the level in your specific household water, which requires individual testing.
Symptoms in the Home That Suggest a Metallic Taste Issue
Households experiencing a metallic taste often notice it first in drinking water or when preparing food. Unlike issues caused by odors or discoloration, metallic taste is a distinct flavor that can be persistent. However, it is important to distinguish this from other taste changes that might arise from plumbing fixtures or water treatment devices. A metallic taste does not necessarily correlate with health risk but can affect water enjoyment and cooking outcomes.
Sample Size and Its Impact on Interpreting Local Water Quality
The 246 samples represent data from a moderate number of wells that were 18 to 74 feet deep, providing a useful regional overview. Still, each well’s conditions and water chemistry can vary significantly, meaning that your household’s water might differ from the median or range values. A small number of wells means regional data can suggest trends but should not substitute for testing your well or tap water to understand your exact situation.
Seasonal and Multi-Year Trends in Iron Levels Within Linn County
The sampling dates span over 16 years, allowing observation of possible variation over time. While some fluctuation can occur seasonally or across years due to groundwater changes, the data has not shown any federal threshold exceedances during this period. This suggests that while iron presence varies, it has remained within commonly accepted limits for water quality aesthetics in the region.
How the C-Series Metallic-Tasting Water Filter Addresses Taste Issues
The C-Series Metallic-Tasting Water Filter can help households reduce or neutralize metallic taste caused by constituents like iron. This system ships ready to configure and uses proven technology to improve water taste by targeting the chemical forms associated with metallic flavors. It does not alter water safety but enhances water palatability for drinking and cooking.
What to Document Before Seeking Further Treatment Advice
Before exploring treatment options, note the fixtures where metallic taste is most noticeable, and whether it varies by season or changes with water use patterns. Record any recent plumbing changes or water source events. The most definitive step is to obtain a certified laboratory water test focusing on metallic constituents, as this identifies your household’s actual water quality rather than relying solely on regional data.
In summary, the regional groundwater data for Linn County's aquifer 111ALVM shows detectable iron in many samples but no federal threshold exceedances, indicating that metallic taste can occur at varying levels without constituting a health risk. Confirming your household’s water profile through testing is essential, and the C-Series Metallic-Tasting Water Filter provides a documented solution to improve taste for affected households.
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 111ALVM aquifer (Linn County): 246 results from 16 wells, median 54.8 ug/L, range 3.5-800.0 ug/L; none above any federal threshold