Pentair Arsenic Filter

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Understanding Detected, Median, and Range Values from Area Sampling

Detected means the measured arsenic was present above the instrument’s reporting limit in all 14 results from the local aquifer sampling.

The median of 0.27 micrograms per liter indicates the mid-value measured among these results, reflecting typical arsenic levels in the area samples.

The range from 0.16 to 0.5 micrograms per liter shows the variability found in different samples taken from the same aquifer over several years.

No value in this sampling set exceeded federal arsenic thresholds; detections simply confirm measurable presence, not a violation.

Sample Size and Scope of Wells Behind These Arsenic Figures

The data represent 14 samples collected from one well in aquifer 374MUAV within Coconino County, from mid-2013 to early 2026.

Sampling from only one well means these figures provide a limited spatial snapshot rather than a comprehensive survey of all wells.

Depth of the sampled well—approximately 3,086 feet—significantly influences arsenic levels compared to shallower or different sources.

A small sample size plus singular well source recommends caution before extrapolating to another household well’s water quality.

Household Signs That May or May Not Suggest Arsenic in Water

There are generally no immediate taste, smell, or appearance changes in water caused by arsenic at the levels detected in this location.

Health symptoms potentially linked to arsenic exposure require professional medical assessment and cannot confirm arsenic presence in home water.

Other water quality problems causing cloudiness, staining, or odors should not be assumed to be arsenic.

Distinguishing Arsenic From Other Common Water Concerns

Arsenic is a naturally occurring element often confused with iron or manganese, which cause discoloration and staining but are chemically distinct.

Unlike iron or manganese, arsenic does not alter water color or taste noticeably at low concentrations.

Testing is necessary to differentiate arsenic presence from other dissolved solids or minerals that affect water aesthetics.

Additional Questions Commercial Operators Must Address Beyond Household Concerns

Commercial operations must consider regulatory compliance beyond detecting arsenic, including permitted discharge limits and employee safety plans.

Large-volume water use introduces challenges in treatment system sizing and ongoing monitoring frequencies.

Household concerns focus on drinking water safety and taste, while commercial entities evaluate broader operational impacts.

Influence of Sample Depth, Well Depth, and Source Type on Arsenic Levels

Deep wells such as the 3,086-foot well sampled often access geologic formations with different arsenic profiles than shallow wells.

Surface water sources typically show much lower arsenic levels than deep groundwater aquifers.

Knowing the source type and well depth helps set realistic expectations for arsenic treatment needs.

Recommended Next Step: Ordering a Certified Laboratory Arsenic Test

The single most informative step to resolve arsenic concerns is obtaining a certified laboratory test of your household water.

This test will provide your exact arsenic concentration, settling if treatment is needed and guiding the appropriate equipment choice.

When arsenic is confirmed at levels of concern, a Pentair Arsenic Filter ships ready to configure as a documented treatment solution for residential water arsenic removal.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2026-04-21. 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 Arsenic in the 374MUAV aquifer (Coconino County): 14 results from 1 wells, median 0.27 ug/L, range 0.16-0.5 ug/L; none above any federal threshold