According to U.S. Geological Survey groundwater sampling of Lake County's 110DUNED aquifer, iron was detected in all 28 samples from 7 wells ranging 25 to 40 feet deep, with a median concentration of 10,095 micrograms per liter and a maximum of 47,400 micrograms per liter. None of these results exceeded federal thresholds.
Symptoms That Suggest Metallic Taste From Water
Households experiencing metallic taste often report an unusual flavor similar to coins or metal when consuming tap water. This sensation can affect drinking water, coffee, tea, or cooking. However, metallic taste can sometimes arise from other causes, such as recent plumbing work or contamination secondary to household pipes, so not every metal-like taste is linked directly to the water source.
The Role of Household Plumbing Materials and Age
Plumbing components such as older iron pipes, brass fixtures, or galvanized steel can contribute metals that affect taste independently of source water quality. Corrosion of pipes or fittings can release trace amounts of metal ions into water after it leaves the well or municipal system. Thus, metallic taste might originate inside the household plumbing rather than the groundwater supply.
Comparing Lake County’s Metal Taste Indicators With Adjacent Areas
When evaluating metallic taste concerns, it is useful to consider data from neighboring counties. Variations in aquifer geology and industrial history affect iron and other metal levels regionally. Lake County's 110DUNED aquifer shows measurable iron presence in all samples tested over nearly a decade, a pattern that might differ elsewhere in northern Indiana. Comparing these records helps avoid overinterpreting isolated readings as widespread issues.
Distinguishing Metallic Taste From Other Water Quality Issues
Metallic taste may be confused with other water quality complaints such as sulfur odor or earthy taste. Sulfur-related smells usually signal hydrogen sulfide, which is distinct in sensory profile. Likewise, manganese can cause taste and staining but requires separate identification. Proper differentiation ensures addressing the correct cause without unnecessary or ineffective treatment.
How Sample Depth and Source Water Affect Expectations
Samples from 25 to 40 feet deep in Lake County's 110DUNED aquifer reveal consistent iron detection but below threshold levels. Shallower wells or surface water might show different profiles, possibly with more variable metal concentrations. Households with private wells should test their specific water to confirm local conditions, as aquifer-wide data cannot substitute for individual analysis.
As a water treatment option, the Autotrol Metallic-Tasting Water Filter system ships ready to configure for residential use. It is documented to reduce metallic taste by targeting the compounds responsible, improving overall drinking water palatability.
This briefing relies on U.S. Geological Survey data covering multiple wells in Lake County’s 110DUNED aquifer collected between 2014 and 2023. To review the underlying sampling details, visit the official government monitoring site.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2023-07-11. 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 110DUNED aquifer (Lake County): 28 results from 7 wells, median 10095.0 ug/L, range 2110.0-47400.0 ug/L; none above any federal threshold