Government groundwater sampling in Navajo County, AZ, covering aquifer 220NAVJ, shows that hardness—measured by calcium and magnesium—was detected in all 40 samples taken from 14 wells between 2010 and 2019. The median measurement was 2.935 mg/L, with readings ranging from 1.23 to 163.0 mg/L. These wells spanned depths from 554 to 3,737 feet. Importantly, no results exceeded any federal thresholds, indicating the water quality falls within regulatory ranges for this constituent.
Understanding 'Detected,' 'Median,' and 'Range' in This Context
In these samples, 'detected' means instruments identified hardness-causing minerals in every instance, which is typical for groundwater. The 'median' value represents the middle point of concentration across all samples, providing a central tendency, while 'range' captures the lowest to highest values found in the area wells. These figures describe the aquifer's general water quality but do not specify conditions in any individual residential well.
How Water Changes at the Tap with the Autotrol Complete Well System
The documented Autotrol Complete Well System, with a grain capacity of 32,000, is designed to address hardness by reducing calcium and magnesium concentrations in treated water. Once configured, it consistently softens the water, improving taste and reducing scaling on plumbing and appliances. This system does not alter the water’s safety but modifies hardness levels to mitigate common household impacts.
Influence of Well Depth and Source Type on Expected Water Quality
Wells sampled in Navajo County varied widely in depth, which can influence mineral content; deeper wells often encounter different geological formations affecting hardness. As a result, a residential well’s hardness level may differ significantly from the area median or range. Source type—whether confined aquifer, unconfined aquifer, or others—also plays a role in water quality characteristics, so individual testing remains essential.
Potential Long-Term Effects of Untreated Hard Water
Leaving hardness untreated can lead to gradual mineral buildup inside pipes, reducing water flow and increasing maintenance needs for fixtures and appliances. While this does not pose a health risk, it can raise household costs and inconvenience over time. Addressing hardness with an appropriate treatment system helps preserve plumbing lifespan and efficiency.
What a Certified Laboratory Test Will Report and How to Interpret It
A certified lab report for well water hardness will quantify calcium and magnesium ions, typically in mg/L or grains per gallon. Results are interpreted in relation to hardness classifications (soft, moderately hard, hard, or very hard). This report provides the definitive measurement for an individual well, which should guide treatment decisions rather than relying solely on area data.
Distinguishing Complete Well Hardness from Other Common Water Issues
Complete well hardness differs from problems like sediment presence or iron staining, which may coexist but require separate identification and treatment. Hardness primarily concerns dissolved minerals affecting scaling and taste, while other issues relate to suspended particles or specific contaminants.
For a household considering treatment options for their complete well in Navajo County, the essential step is to order a certified laboratory water test specifically analyzing calcium and magnesium concentrations. A result confirming elevated hardness would clarify the need for a system like the Autotrol Complete Well System to manage the problem effectively.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-08-23. 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 Hardness, Ca, Mg in the 220NAVJ aquifer (Navajo County): 40 results from 14 wells, median 2.935 mg/L, range 1.23-163.0 mg/L; none above any federal threshold