1. Recognizing Effects Related to Plumbing Materials and Age
If rust-colored stains or scale build-up appear at faucets or in appliances, it’s important to consider the role of your plumbing’s materials and age, which influence water appearance and feel independently from what comes out of the well. Older iron or steel pipes may corrode internally, contributing to rust deposits regardless of source water condition.
2. The Reliability of Regional Sampling in Navajo County
The U.S. Geological Survey sampled 14 wells, from 554 to 3,737 feet deep, in Navajo County’s aquifer 220NAVJ over nearly a decade. These 40 measurements showed hardness values (as calcium and magnesium) ranging from 1.23 to 163.0 mg/L with a median of 2.935 mg/L. This range reflects natural variation across the aquifer, not an individual home’s water concentration.
Because samples come from multiple wells and years, they provide useful context but do not establish any one well’s water quality. Individual testing is needed to confirm your household’s levels.
3. Interpreting Certified Laboratory Reports on Hardness and Rust Contributors
Certified lab results will detail concentrations of calcium and magnesium, contributing to hardness, reported in mg/L. You will see detected values and reporting limits. Remember, detection does not imply a violation or safety concern; it only quantifies the presence of constituents. Understanding these reports helps differentiate hardness levels and guides the best response.
4. Consequences of Untreated Well Rust and Hardness Over Time
Without treatment, hardness minerals can cause scale deposits inside pipes and water-using appliances, potentially reducing their efficiency and lifespan. Rust particles may stain fixtures and laundry, and clog small openings. These effects develop gradually and can worsen once initial equipment fails and is no longer managing the conditions.
5. Differentiating Between Rust and Hardness and Other Water Issues
Rust typically stems from iron or related particles, while hardness results from dissolved calcium and magnesium. These differ from sediment or discoloration caused by organic matter or from water chemistry issues like pH imbalance. Unlike some microbial or chemical problems, rust and hardness relate largely to mineral content and particulate matter, as shown by regional sampling.
6. Household Signs That Point to Well Rust and Hardness and Those That Do Not
- Signs pointing to rust and hardness: brownish or reddish stains on sinks or tubs; flaky buildup on fixtures; scale deposits inside appliances; water feels hard or causes soap inefficiency.
- Signs not directly linked: foul odors, cloudy water from air bubbles or sediment, or taste changes unrelated to minerals.
Given that the Navajo County aquifer 220NAVJ samples show a consistent presence of hardness minerals without exceeding any federal safety thresholds, addressing rust and hardness focuses on managing mineral content and particulate matter rather than safety concerns.
For confirmed hardness and rust conditions after equipment failure, the Autotrol Well Rust + Hardness System ships ready to configure. It offers 32,000 grain capacity designed for home water treatment, targeting these specific mineral challenges.
This summary relies on data from wells sampled across Navajo County’s aquifer 220NAVJ as recorded by the U.S. Geological Survey at waterdata.usgs.gov/monitoring-location/363558110392501/.
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

