In Lake County, Indiana, water used by households is frequently drawn from the 110DUNED aquifer. This groundwater travels through wells, typically reaching depths between 25 and 40 feet, before it flows into residential plumbing systems. Understanding the nature of this water and its iron content helps homeowners address common challenges with iron and rust in their water.
Belief: Public Water System Records Show Exactly What’s in My Well Water
Many assume that local public water data reflects their individual well condition. However, the U.S. Geological Survey’s sampling of seven wells across Lake County’s 110DUNED aquifer between 2014 and 2023 provides area-wide measurements, not specific household data. These samples report iron detected consistently, with a median concentration of 10,095 micrograms per liter and a range from 2,110 to 47,400 micrograms per liter. While this confirms iron is commonly present, measuring your own well water through laboratory testing is the only way to know its exact iron level.
Belief: Iron Above Secondary Standards is a Health Risk
Lake County’s aquifer samples show iron present at varying amounts, but all results fall below any federal health-based thresholds. Iron is regulated mainly for its aesthetic impact—color, taste, and staining—rather than health risks. Secondary standards set limits to maintain water appearance and prevent rust stains or metallic taste, not to indicate danger. This distinction helps homeowners understand that detecting iron does not mean their water is unsafe to drink.
Belief: The Depth of the Well or Water Source Doesn’t Affect Iron Levels
The sampled wells ranged from 25 to 40 feet deep, a common range for private wells in the area. Depth influences the water chemistry; shallower wells often have different iron concentrations than deeper ones due to variations in oxygen exposure and mineral content. Knowing the depth of your own well helps anticipate iron presence and guides testing and treatment decisions specific to your water source.
Belief: Plumbing Materials Don’t Influence Observed Iron or Rust Issues
While iron originates in the aquifer water, the plumbing system plays a role in how rust appears in the home. Older pipes, especially iron or steel, can corrode over time, contributing to rust-colored water separate from the source water itself. Plastic or copper pipes generally do not add to iron content but may still show iron staining if present in the incoming water. Understanding your home’s plumbing materials is key to diagnosing the cause of rust discoloration.
Belief: Ignoring Iron and Rust Problems Has Only Cosmetic Consequences
Allowing iron and rust in water to persist can lead to more than staining. Over time, buildup may clog pipes or damage appliances relying on water flow, such as water heaters and washing machines. Rust deposits can reduce efficiency and increase maintenance needs for household systems. Addressing iron effectively helps maintain the lifespan and performance of plumbing and water-using devices.
Belief: All Fixtures and Appliances Are Equally Affected by Iron and Rust
Iron and rust impacts often first appear in fixtures where water stands or flows slowly, such as faucets, showerheads, and toilets. These locations provide conditions for rust sediment to settle or cling. Appliances with water storage—like humidifiers or ice makers—may also show early signs of rust buildup. Recognizing which fixtures show issues first helps target treatment and maintenance efforts.
In summary, the U.S. Geological Survey’s area-wide data for Lake County’s 110DUNED aquifer confirms iron presence without violating federal standards. Individual testing is essential to assess your home’s water. Consideration of well depth and plumbing materials clarifies iron and rust appearance in household water. For homes where existing equipment cannot keep up, the Pentair Orange Iron & Rust Stains Filter ships ready to configure as a documented solution to reduce iron-related staining and buildup effects.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2023-07-11. 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 110DUNED aquifer (Lake County): 28 results from 7 wells, median 10095.0 ug/L, range 2110.0-47400.0 ug/L; none above any federal threshold
- ✓ 90-Day Money-BackNo restocking fees — return within 90 days.
- ✓ Manufacturer WarrantyGenuine Fleck · Pentair · VIQUA equipment.
- ✓ Free Expert SizingTalk to a specialist and buy the right system the first time.