Water in Washoe County often comes from the deep aquifer known as 100VLFL. Groundwater from this source travels through varying depths, from 14 to over 800 feet, before reaching residential taps. This aquifer's quality reflects natural mineral content and geological factors unique to the area.
If you want to understand how iron levels change over time in Washoe County’s aquifer
Samples taken between May 2010 and September 2023 from 20 wells in this aquifer show iron concentrations ranging widely—from as low as 3.2 micrograms per liter (ug/L) to as high as 977 ug/L. The median iron level across 37 results is 9.2 ug/L. Iron was detected in 22 of those results, while 15 were below the reporting limit. This variability reflects seasonal and multi-year shifts in groundwater chemistry rather than a steady state. Note that none of these measures exceed federal regulatory thresholds for iron, which means there was no federal limit violation reported in this area during the sampling period.
If you want to know how treated water improves at the tap after employing a dedicated iron and rust filtration system
When water treatment technology specialized for iron and rust—such as the C-Series Orange Iron & Rust Stains Filter—is configured for a household, it targets iron particles causing staining and discoloration. This system helps prevent iron accumulation that can cause rust-colored stains on fixtures and laundry. While it does not affect safety thresholds, it effectively improves water clarity and appearance by removing iron oxidized forms responsible for rust-like discoloration. The treated water typically looks clearer and causes fewer stains, supporting household maintenance and comfort.
If you are comparing Washoe County's iron data to a neighboring county’s record
Directly comparing aquifer iron levels across counties requires care. Neighboring areas may have different geology, aquifer depths, and sampling histories. Differences in sample timing, well depth, and local water conditions can produce varying iron ranges. For example, a nearby county might show a higher or lower median iron concentration, but that alone does not indicate a better or worse water quality situation for your household. Comparisons should be made with attention to sampling methods, well characteristics, and local environmental factors to avoid over-interpreting the data.
If you want to understand how iron gets into Washoe County groundwater and water systems
Iron naturally occurs in the soil and rock formations surrounding and underlying Washoe County’s aquifer. Groundwater dissolves and carries iron compounds as it moves through these geological layers. This process increases iron content, especially in wells drilled through iron-rich strata. Iron in water can also oxidize when exposed to air in pipes, causing visible rust-colored staining on plumbing fixtures and laundry. Thus, iron presence is a chemical characteristic of the aquifer and plumbing environment rather than a contamination incident.
If you have a certified water test report measuring iron and want to understand it effectively
A laboratory test for iron in water typically reports concentration in micrograms per liter (ug/L). Your report will state a numeric value or indicate if the level is below the reporting limit. Detected iron is common in groundwater and does not imply a violation or safety concern if below federal thresholds. The test results help identify if iron causes aesthetic issues like staining or unpleasant discoloration. Knowing your household’s specific iron concentration guides whether an iron and rust stains filter system might benefit your water quality and home maintenance.
What you should not conclude from Washoe County data: The regional measurements represent samples from various wells in the aquifer, not your individual water supply. Detection of iron in this record is not a violation or indication of unsafe water. You must have your own water tested to determine your household’s actual iron concentration and related needs. This area-level data provides helpful context but cannot substitute for direct testing of your water source.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2023-09-21. 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 100VLFL aquifer (Washoe County): 37 results from 20 wells, median 9.2 ug/L, range 3.2-977.0 ug/L; none above any federal threshold