Regional iron bacteria presence shows variability over time and depth
Groundwater samples collected in Washington County, Nebraska, from wells accessing aquifer 112SDGVD between August 2010 and April 2026 reveal iron presence ranging broadly. Among 85 measurements from 22 wells of varying depths (25 to 249 feet), iron was detected in most but at concentrations spanning from 3.3 to 11,800 micrograms per liter (ug/L), with a median at 1,185 ug/L. These figures reflect natural fluctuation and do not pinpoint conditions at any individual home’s well.
Public groundwater data differs from private well tests in scope and relevance
The US Geological Survey's sampling represents regional conditions across multiple wells but does not substitute for testing a private residential well directly. While the area-wide data indicates that iron is frequently present within this aquifer, individual well results can vary widely due to location, depth, and local geology. Homeowners seeking to understand their own water conditions should obtain certified laboratory analysis of their source water for precise iron and bacteria levels.
Iron bacteria can enter the groundwater through natural geological processes in this area
Iron bacteria are naturally occurring microorganisms that thrive in iron-rich environments such as aquifer 112SDGVD. They form slime and biofilms when iron compounds oxidize, often facilitated by exposure to oxygen when groundwater moves through fractures and pore spaces. These microbes are not introduced by surface contamination but develop in situ, contributing to iron deposits and slime accumulation in well and plumbing systems over time.
Interpreting this aquifer data cautiously in comparison to nearby counties
While neighboring counties may report different median or range values for iron in groundwater, such differences should not be overinterpreted as direct predictors of a homeowner’s water quality. Variations often reflect distinct hydrogeological settings or sampling methods. The Washington County aquifer data stands as a reliable indication of regional iron presence but should be used as a contextual guide rather than a definitive standard for individual wells.
Long-term effects of untreated iron bacteria include staining and system slime buildup
When iron bacteria are present and left unaddressed, households commonly experience reddish or orange staining on fixtures, laundry, and dishes. The bacteria produce biofilms that accumulate inside pipes, pressure tanks, and water-using appliances, potentially reducing flow and requiring frequent maintenance. These impacts, while aesthetic and operational, do not represent direct safety risks but may compromise water use convenience.
For households in Washington County with measured water demand and iron bacteria concerns, the C-Series Iron Bacteria & Slime Filter ships ready to configure and is designed to reduce slime and iron-related deposits efficiently. Testing your water source informs proper treatment selection and ensures effective management of iron bacteria issues tailored to your household’s usage.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2026-04-15. 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 112SDGVD aquifer (Washington County): 85 results from 22 wells, median 1185.0 ug/L, range 3.3-11800.0 ug/L; none above any federal threshold