The U.S. Geological Survey collected groundwater samples in Merrimack County's aquifer from December 2021 to March 2022. Among 80 results from 62 wells, nickel was detected in 30 samples with concentrations ranging from 0.2 to 14.3 micrograms per liter (ug/L) and a median result of 0.55 ug/L. No sample in this data set exceeded any federal thresholds for nickel.
Clarifying 'Detected', 'Median', and 'Range' in Nickel Sampling Results
When government sampling uses terms like 'detected,' it means the measuring instruments found measurable nickel levels in some water samples. 'Below the reporting limit' means nickel was too low to be quantified accurately in those samples. The 'median' is the middle value among all detected amounts, giving a typical concentration, while the 'range' shows the lowest and highest values found. These values represent regional groundwater conditions at tested wells, not your household water directly.
Additional Questions for Commercial or Industrial Water Users
Commercial or industrial users often need more detailed information about heavy metals like nickel, including their impact on equipment corrosion, manufacturing processes, and regulatory compliance. They may also evaluate cumulative effects of multiple metals and assess water quality variability over time for operational safety. Household concerns typically focus on water clarity, taste, and potential health impacts.
Information Households Should Gather Before Seeking Treatment Advice
Before considering treatment, households should obtain a certified laboratory test of their own water source that measures nickel and other heavy metals specifically. This test will provide precise concentrations unique to the residence’s water. Note the water source type (private well or municipal supply), recent test dates, and any observed water quality changes or issues such as discoloration or unusual taste.
How Heavy Metals Like Nickel Differ from Common Water Quality Issues
Heavy metals such as nickel are distinct from more prevalent household water issues like hardness or iron staining. While hardness affects mineral buildup, and iron can cause reddish staining, nickel is a trace metal primarily found at low concentrations in groundwater. The presence of nickel detected by sampling does not imply visible effects or typical water quality problems seen with other elements.
Seasonal and Multi-Year Variation in Nickel Levels from December 2021 to March 2022
The USGS sampling covered four months in winter and early spring of 2021–2022. Within this period, nickel levels fluctuated across wells, with some measurements near the reporting limit and others higher, up to 14.3 ug/L. Such variation is normal in groundwater due to factors like water table fluctuations and geochemical changes but does not indicate any legal exceedance or health concern according to the record.
Example: Understanding the Median and Range of Nickel for a Merrimack County Homeowner
If your household water came from this aquifer, the median nickel level of 0.55 ug/L means half of the positive detections were below or above this value among the sampled wells. The range from 0.2 to 14.3 ug/L shows the lowest and highest concentrations detected regionally. Since no measurements exceeded federal thresholds, these figures reflect background presence rather than a safety violation. Your home's actual nickel concentration requires specific testing to confirm.
These findings summarize nickel sampling results for a group of wells in Merrimack County’s aquifer, based on USGS data from December 2021 to March 2022. To view the full data and methodology, visit the official U.S. Geological Survey groundwater monitoring site. For water treatment tailored to heavy metals, the C-Series Heavy Metals Filter ships ready to configure and can address nickel effectively once household water testing confirms its presence.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2022-03-30. 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 Nickel in the aquifer (Merrimack County): 80 results from 62 wells, median 0.55 ug/L, range 0.2-14.3 ug/L; none above any federal threshold