Sampling Scope and Data Background
The Douglas County portion of aquifer N100BSNRGB has been sampled by the U.S. Geological Survey through 11 wells between depths of 88 and 180 feet. Over a 16-year period, 162 samples were collected from 2010 to early 2026. Iron was detected in 51 samples, with concentrations ranging from 3.3 to 142.0 micrograms per liter (ug/L), and the median concentration registering at 9.1 ug/L for detected cases. A majority of 111 samples were below the reporting limit, indicating either very low or undetectable levels of iron in those instances. This dataset provides an area-level profile rather than a direct measurement of any single well. Well-specific testing remains essential for precise water quality assessment.
Interpreting Aesthetic Secondary Standards vs Health Limits
Detected iron in the aquifer is consistently below federal health-based limits, so there is no safety violation indicated in these samples. Aesthetic secondary standards address factors such as taste, color, and staining potential rather than health risks. Iron concentrations near or above certain levels can cause reddish or rusty discoloration in water and may stain plumbing fixtures or laundry. Understanding this distinction helps prioritize treatment goals focused on improving water appearance and longevity of household plumbing rather than mitigating health hazards.
Key Information to Document Before Seeking Water Treatment Guidance
Before exploring solutions, record specific details about your water source and quality. Laboratory test reports from your own private well will provide the exact iron levels and hardness values affecting your household. Include well depth, water usage rates, and any observed water appearance issues such as rust stains or scale buildup. This information is critical for accurately sizing and configuring any treatment system to address your individual water conditions.
Changes to Expect at the Tap with Treatment
When a properly selected water treatment system is configured to handle rust and hardness, you can anticipate clearer water with reduced staining potential and minimized scale formation on fixtures and appliances. For example, the C-Series Well Rust + Hardness System has a grain capacity of 32,000, enabling it to manage typical iron and hardness loads for residential use. Water treated by this system generally feels softer and looks brighter, enhancing everyday household water quality and maintenance ease.
Pathways of Rust and Hardness Constituents into Local Groundwater
In Douglas County’s aquifer N100BSNRGB, subsurface geological materials contribute naturally occurring iron that may dissolve into groundwater. This iron presence varies depending on local soil and rock composition, depth, and groundwater flow. Hardness minerals such as calcium and magnesium also originate from limestone and dolomite formations common in the region’s subsurface environment. These factors together influence the rust and hardness characteristics experienced by residential wells drawing from this aquifer.
For households addressing rust and hardness challenges in Douglas County, the C-Series Well Rust + Hardness System ships ready to configure and is designed to meet demand based on your measured grain capacity needs. Consult your water test results carefully to ensure an appropriate setup aligned with your water’s specific characteristics.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2026-03-18. 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 N100BSNRGB aquifer (Douglas County): 162 results from 11 wells, median 9.1 ug/L, range 3.3-142.0 ug/L; none above any federal threshold