Opening: What Government Sampling Data Tells Us About Iron in Connecticut's Aquifer 112DFSF
The U.S. Geological Survey has measured iron in groundwater wells within the Connecticut area, specifically in aquifer 112DFSF. Across 70 samples from 19 wells taken between 2015 and 2025, iron was detected in 21 samples. The concentrations ranged broadly from 0.04 to 700 micrograms per liter.
1. Understanding the Range of Iron Concentrations and Federal Standards
None of the iron measurements recorded in this sampling exceeded federal health-based thresholds for drinking water. This means while iron presence is noted, it is not classified as a safety violation or health risk as per federal guidelines. Instead, iron levels relate more to water’s taste, color, and potential for staining rather than direct health effects.
2. Interpreting the Median and Range: A Homeowner’s Practical Look
The median iron concentration in these samples was 19.5 micrograms per liter, which represents a midpoint value in the detected range. Homeowners might experience iron-related water issues if their own water tests show similar or higher iron levels, but this data alone cannot define their household’s water quality precisely. Individual testing is essential to determine personal water conditions accurately.
3. The Effect of Plumbing Materials and Age on Iron and Rust Appearance
Iron and rust problems in household water can also stem from internal plumbing factors, such as the age and material of pipes. Older or corroded iron pipes may contribute iron particles to the water after it leaves the source, potentially creating rust stains even if source water iron levels are low. Understanding your plumbing composition is an important part of evaluating iron-related concerns.
4. Seasonal and Multi-Year Variations in Iron Levels Reflected in the Sampling Record
The samples collected span over ten years and include wells ranging from 10 to 80 feet deep, showing variation in iron concentrations over time and depth. Seasonal changes, aquifer recharge rates, or localized conditions can influence these fluctuations, meaning a single test at one time may not capture the full picture of iron presence in your water.
5. Simple Maintenance Rhythms for Managing Iron and Rust with the C-Series Orange Iron & Rust Stains Filter
The C-Series Orange Iron & Rust Stains Filter ships ready to configure and is designed to reduce iron and rust staining issues typical in homes with detectable iron in water. Maintaining the system involves routine checks and filter cartridge replacement based on water usage and iron levels, helping sustain clear, stain-free water over time.
When you know your household’s water demand and have tested your water’s iron content, the C-Series Orange Iron & Rust Stains Filter offers a practical solution tailored to effectively address these concerns, enhancing water quality for your home.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-11-21. 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 Iron in the 112DFSF aquifer (FIPS 180): 70 results from 19 wells, median 19.5 ug/L, range 0.04-700.0 ug/L; none above any federal threshold