When reading a laboratory water test report, it may list iron concentrations in micrograms per liter (ug/L). Typical results from the Merrimack County aquifer, based on 2021 to 2022 U.S. Geological Survey sampling of 21 wells with 23 samples, show iron levels ranging from 0.0 to 240.0 ug/L, with a median of 10.0 ug/L. Iron was detected in 17 of these samples but none exceeded any federal limits. These figures represent the aquifer’s overall profile and do not reflect any individual household well.
How the C-Series System Removes Iron and Manages Hardness
Iron in groundwater often appears as dissolved iron or fine particles that can cause staining, discoloration, and metallic taste, while hardness—caused primarily by calcium and magnesium—can lead to scale buildup. The C-Series Iron + Hard Water System uses media designed to capture iron particles and soften the water by exchanging hardness minerals with sodium ions. This system is rated for 32,000 grains capacity, which supports effective treatment for typical household water use volumes. The technology operates by filtering iron from the water and reducing hardness levels, improving water clarity, taste, and protecting plumbing and appliances from scale damage.
Additional Questions Commercial Operators Must Consider
Unlike most households, commercial or industrial operators need to consider water demand variability, regulatory requirements, and potential impacts on machinery sensitive to iron or hardness. They also evaluate system capacity for higher flow rates and may require treatment capable of handling peak loads or specific iron forms. Households generally focus on staining and taste while larger operations must ensure consistent water quality to meet business needs.
How Iron and Hardness Enter Merrimack County’s Aquifer
Iron naturally occurs in bedrock and soil minerals throughout Merrimack County’s aquifer. Water passing through these geological formations dissolves iron-bearing minerals, imparting iron to the groundwater. Hardness results from calcium and magnesium compounds similarly leaching from the geology. These conditions vary by location, geological layer, and water residence time underground. Government sampling reflects these natural variations across multiple local wells.
Common Home Symptoms That Do and Do Not Indicate Iron and Hardness Problems
Visible signs like reddish-brown staining on fixtures and laundry often point to iron presence. Hard water commonly causes scale deposits on faucets, water heaters, and inside pipes. However, odors, slimy deposits, or cloudy water are not solely attributable to iron and hardness and may indicate other water quality issues. Only a water test can confirm the levels of iron and hardness present.
Sample Depth and Well Characteristics Affect Iron and Hardness Expectations
Shallow wells may have different iron and hardness levels compared to deeper wells due to differing exposure to geological layers. Similarly, wells drawing from confined aquifers can show distinct profiles compared to unconfined systems. The 2021-22 samples cover a range of well depths in Merrimack County, producing the range of iron levels seen. Homeowners should consider their well depth and aquifer details along with test results to understand their water quality better.
Understanding Iron Concentration Range and Median: A Household Example
The 23 samples show iron ranging from non-detectable levels to 240.0 ug/L, with a median of 10.0 ug/L. For a homeowner, this means local wells typically have low to moderate iron presence, but some wells may measure higher. Median values help set expectations but individual wells can differ significantly. Only a specific water test of your household well analysis can determine your actual iron concentration.
Next Step: Laboratory Testing for Your Household Water
The only definitive way to confirm your home’s iron and hardness levels is to order a water analysis from a certified laboratory. This test will measure concentrations in your specific water supply, clarifying if your failed equipment is due to elevated iron or hardness. With this data, you can consider solutions like the C-Series Iron + Hard Water System, which ships ready to configure for effective treatment tailored to your household’s needs.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2022-01-21. 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 aquifer (Merrimack County): 23 results from 21 wells, median 10.0 ug/L, range 0.0-240.0 ug/L; none above any federal threshold