Fleck Limescale & Scale Buildup System

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Residents drawing water from San Juan County’s aquifer 110AVMB rely on groundwater that typically rises through wells between 35 and 68 feet deep before reaching household taps. Government monitoring by the U.S. Geological Survey has sampled nine wells across this area between 2010 and 2025 to assess mineral content that influences water quality, particularly focusing on calcium and magnesium hardness, which contribute to limescale formation.

If You Need Context for Hardness Levels in This Aquifer

Sampling collected 229 results showing calcium and magnesium concentrations contributing to total hardness. These ranged from 644.0 to 1750.0 mg/L with a median value at 1190.0 mg/L. Notably, none of these results exceeded any federal thresholds for hardness constituents in groundwater. This means while hardness is detected consistently, none of the findings represent a federal violation or safety concern for water users in the region. However, these concentrations provide insight into the potential for limescale buildup on fixtures and appliances over time when untreated.

If You Plan to Obtain a Certified Laboratory Hardness Test for Your Household Water

A certified lab test will report specific calcium and magnesium levels, often combined as total hardness expressed in mg/L or grains per gallon. Understanding your own water’s precise hardness requires such a test due to variations in depth, source, and treatment of your well or supply. The report will help determine the scale-forming potential unique to your home’s plumbing system.

If You Are Comparing San Juan County’s Hardness to Neighboring Areas

While neighboring counties may report different hardness ranges, be cautious not to assume your water matches those records. Each aquifer or system varies, and cross-area data serve only as a general reference. Local groundwater in aquifer 110AVMB shows a specific pattern of median and range. Use region data to frame broader expectations but rely on your own testing for decisions affecting your household.

If You Want to Understand the Terms ‘Detected,’ ‘Median,’ and ‘Range’ in the USGS Report

• Detected: Mineral hardness was measured in all samples, indicating the constituent’s presence in local groundwater.
• Median: The middle value among all samples (1190.0 mg/L) represents a central tendency useful for estimating typical hardness.
• Range: Values span from 644.0 to 1750.0 mg/L, reflecting natural variability in groundwater hardness across sampled wells.

These terms describe the characteristics of the aquifer’s water but do not describe any individual well’s exact condition without testing.

If You Are Weighing Whether Your Situation Is Limescale or Another Water Issue

While limescale results directly from calcium and magnesium hardness in water, other common household water concerns—such as iron staining or sediment—require different diagnostics and solutions. Knowing the constituent’s role clarifies that observed scale buildup is linked to hardness concentrations measured here, distinct from unrelated water qualities.

To settle your household’s water quality question, order a certified laboratory hardness test that quantifies calcium and magnesium in your own water. If significant hardness is confirmed, the Fleck Limescale & Scale Buildup System ships ready to configure and offers a documented means to address limescale buildup effectively. Considering the San Juan County aquifer 110AVMB data alongside your test results will guide the best approach for managing your household’s water quality and preserving plumbing integrity.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2025-09-19. 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 Hardness, Ca, Mg in the 110AVMB aquifer (San Juan County): 229 results from 9 wells, median 1190.0 mg/L, range 644.0-1750.0 mg/L; none above any federal threshold