1. What the measured range means against the relevant federal standard, and what it does not mean
Government sampling by the U.S. Geological Survey in Linn County's aquifer 111ALVM shows nitrite levels ranging from 0.001 to 0.327 mg/L across multiple wells 18 to 74 feet deep. No results in this data set exceed any federal thresholds. This means that while nitrite has been detected in the regional groundwater, its concentrations remain within regulatory limits. However, these measurements do not represent any single well's condition and cannot determine the safety or compliance of your household water without a specific test.
2. Maintenance rhythm of the documented technology in plain terms
The C-Series Nitrate & Nitrite (Well) Filter, designed for residential water use, ships ready to configure and requires attention based on water usage and quality fluctuations. Routine upkeep involves monitoring system flow and performance indicators to ensure it continues to reduce nitrate and nitrite effectively. The timing for filter replacement or regeneration varies and should be guided by observed changes in water condition or manufacturer recommendations—no plumbing service is needed, as the system is user-manageable.
3. What 'detected,' 'median,' and 'range' mean in the sampling record on this page
Of the 498 nitrite samples from 16 wells in the Linn County aquifer 111ALVM, nitrite was detected in 334 samples while 164 were below the reporting limit. The median value, 0.011 mg/L, represents the middle point where half the detected values are above and half below. The range captures the lowest to highest concentrations recorded—0.001 to 0.327 mg/L. Detection here indicates measurable amounts by instruments, not an indication of contamination or hazards.
4. How seasonal or multi-year variation shows in the record (dates and ranges given)
Sampling spans from March 8, 2010, to June 23, 2026, revealing multi-year variability in nitrite levels within the aquifer. The range does not appear to trend upward or downward significantly over time but reflects fluctuating concentrations possibly related to environmental factors or localized influences. Awareness of these variations helps households anticipate and monitor their own water quality changes throughout seasons or years.
5. What distinguishes this problem from the two problems most often confused with it
Nitrate and nitrite are chemically related but distinct. This record focuses on nitrite measurements, while nitrate is often measured separately; both can influence water quality differently. Unlike aesthetic concerns such as taste or staining from minerals, nitrite and nitrate relate specifically to nitrogen compounds that may affect health if present at high levels. Recognizing this difference clarifies why targeted treatment technologies address nitrate and nitrite together.
6. How many samples and wells stand behind the figures, and what a small sample means
The data set includes 498 samples from 16 wells, offering a robust regional picture of nitrite presence in the aquifer. While this breadth helps characterize the area broadly, a sample size of 16 wells means that individual variation can be considerable. Therefore, testing your household water remains essential to know your specific nitrate and nitrite levels accurately, as local conditions may differ from regional averages.
In summary, this page has led you through understanding nitrate-related nitrite data for Linn County's aquifer 111ALVM, highlighting what government sampling does and does not show. It has also outlined the maintenance simplicity of the C-Series Nitrate & Nitrite (Well) Filter and explained key technical terms from the record to help you weigh treatment options confidently.
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 Nitrite in the 111ALVM aquifer (Linn County): 498 results from 16 wells, median 0.011 mg/L, range 0.001-0.327 mg/L; none above any federal threshold