If you notice your water is causing metal fixtures to dull or develop rust-like stains, this is often an early sign of corrosive water commonly found in homes drawing from aquifer 111ALVM in El Paso County.
1. Which Fixtures and Appliances Show Signs of Corrosion First and Why
Corrosive water typically affects faucets, showerheads, and piping materials earliest. These are the first points where water contacts metals, leading to gradual deterioration or discoloration. Appliances such as water heaters and washing machines may also experience accelerated wear due to corrosion buildup inside components.
2. What to Document Before Seeking Treatment Advice
Before considering any water treatment, keep detailed notes on:
- Which fixtures show corrosion and the nature of the damage (e.g., rust stains, pitting)
- Any changes in water taste, color, or clarity
- Well depth or municipal water source information available
- Any prior water quality test results for pH or mineral content if accessible
These observations help clarify the severity of corrosivity and guide tailored solutions.
3. Understanding 'Detected,' 'Median,' and 'Range' in Local Water Sampling
According to the U.S. Geological Survey, chloride was detected in 154 of 160 samples taken from 50 wells in El Paso County’s aquifer 111ALVM, spanning depths from 16 to 215 feet. The median chloride concentration was 16.5 mg/L, with a range from as low as 0.03 mg/L up to 1100 mg/L. 'Detected' means the instrument measured chloride presence; it does not imply any health risk or legal problem. The median is the middle value in the data set, giving a typical concentration, while the range shows the lowest and highest measurements recorded. These values illustrate the variability you might expect across wells in the same area, not the exact condition of any individual well or home supply.
4. How Well Depth and Source Type Affect What to Expect
Wells in this aquifer vary considerably in depth, which influences water composition. Generally, deeper wells may exhibit different chloride levels compared to shallower ones. Similarly, the type of water source—whether private well or municipal system drawing from this aquifer—can yield distinct water profiles. This variability means that only testing your specific water supply can accurately determine corrosivity severity at your home.
5. What the Chloride Concentration Range Indicates Compared to Federal Standards
The federal secondary standard for chloride in water is 250 mg/L, a guideline intended to prevent taste, staining, and corrosivity issues—this is not a health-based limit. In the El Paso County samples, 8 results exceeded this threshold, indicating that some water sources can cause aesthetic or material effects. However, exceeding this secondary standard is not a violation and does not indicate unsafe water. It simply signals that water treatment might be beneficial to protect plumbing and enhance water experience.
To address corrosive water conditions commonly encountered in this region, the Pentair Corrosive Water Damaging Pipes Filter provides a solution designed to mitigate corrosivity effects on piping and fixtures. This system ships ready to configure and can be a practical step after assessing your water quality.
In summary, local groundwater sampling shows varied chloride levels with some instances above aesthetic guidelines but no health risks established. To know your home's corrosivity level, a dedicated water test is necessary. Following the outlined steps helps you decide if a treatment system like the Pentair filter is appropriate for your El Paso County home.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-12-18. 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 Chloride in the 111ALVM aquifer (El Paso County): 160 results from 50 wells, median 16.5 mg/L, range 0.03-1100.0 mg/L; 8 above an AESTHETIC secondary standard only (secondary standard 250.0 mg/L (aesthetic)) - not a health finding
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