Residential Iron Bacteria in Bernalillo County: What Local Government Data Reveals About Your Water

What does government sampling say about iron in Bernalillo County's groundwater?

The U.S. Geological Survey conducted sampling of 18 wells between May 2013 and October 2024 in Bernalillo County's aquifer 112SNTF, testing 162 iron results. Iron was detected in 82 results with a median concentration of 18.4 micrograms per liter and a range from 4.1 to 514 micrograms per liter. Eighty results were below the reporting limit. None of these results exceeded any federal threshold for iron content. These measurements reflect regional groundwater conditions, not the specific well water in your household.

How does iron enter groundwater and household water in this area?

In Bernalillo County, iron commonly occurs naturally in soil and rock formations, dissolving into groundwater over time. The aquifer 112SNTF contains iron minerals that release iron ions into well water. Additionally, iron bacteria thrive when iron is present, feeding on iron and creating slimy deposits. This biological presence can occur as water moves through aquifer materials, well casings, or distribution plumbing, affecting water quality and system function.

How do you evaluate treatment needs based on household water usage?

Assessing the capacity of any treatment system requires knowing your household's daily water demand—typically measured in gallons per day—and the iron concentration in your water sample. Since regional data shows a broad range of iron levels, testing your specific well water is essential. Treatment systems designed for iron bacteria operate effectively when matched to demand levels, ensuring they handle the total volume while addressing iron-related contamination without excess strain or waste.

Which fixtures and appliances are usually affected first by iron bacteria?

Fixtures and appliances that continuously use or hold water—such as faucets, toilets, water heaters, and washing machines—are often the first to show impact from iron bacteria. The bacteria and slime can cause staining on porcelain and metal surfaces, reduce flow through clogged pipes or aerators, and promote corrosion inside appliances. Hot water systems may accelerate bacteria activity due to temperature favorable for growth, leading to buildup that impairs performance.

What are the recommended steps to identify iron bacteria presence in your household water?

Begin with visual inspections for reddish-brown staining or slimy deposits around faucets and in water storage. Follow with a simple iron concentration test kits for preliminary concentrations. Consulting a certified laboratory for precise iron and bacteria identification confirms the presence and levels of iron bacteria. Testing your water sample clarifies if regional iron bacteria is affecting your household, differentiating it from other common water quality issues.

Why do aesthetic secondary standards for iron differ from health-based limits?

Federal rules set secondary standards for iron based on appearance, taste, and staining potential rather than health safety. The regional iron concentrations measured in Bernalillo County show no exceedance of federal health-based thresholds, indicating no direct health risk. However, iron at even moderate levels can cause noticeable water color changes, metallic taste, or plumbing staining, which are quality and maintenance concerns rather than safety issues.

For households measuring daily water use alongside iron concentrations, the Autotrol Iron Bacteria & Slime Filter offers a targeted solution. This system ships ready to configure for effective treatment of iron bacteria, helping maintain water clarity and protect plumbing fixtures in Bernalillo County homes.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2024-10-16. 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 112SNTF aquifer (Bernalillo County): 162 results from 18 wells, median 18.4 ug/L, range 4.1-514.0 ug/L; none above any federal threshold