Well water contaminant guide

Hardness in private well water

Hard water causes scale, appliance wear, and soap inefficiency.

Common limit: No health MCL; >120 mg/L is hardUnit: mg/L as CaCO3aesthetic

What to do

Consider a softener if scale, dry skin, or appliance buildup is a problem.

Treatment options

  • Water softener
  • Template assisted crystallization

Hardness guides by state

Hardness in Alabama well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Alaska well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Arizona well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Arkansas well water

State-specific guide for interpreting hardness results in private wells.

Hardness in California well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Colorado well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Connecticut well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Delaware well water

State-specific guide for interpreting hardness results in private wells.

Hardness in District of Columbia well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Florida well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Georgia well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Hawaii well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Idaho well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Illinois well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Indiana well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Iowa well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Kansas well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Kentucky well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Louisiana well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Maine well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Maryland well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Massachusetts well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Michigan well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Minnesota well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Mississippi well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Missouri well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Montana well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Nebraska well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Nevada well water

State-specific guide for interpreting hardness results in private wells.

Hardness in New Hampshire well water

State-specific guide for interpreting hardness results in private wells.

Hardness in New Jersey well water

State-specific guide for interpreting hardness results in private wells.

Hardness in New Mexico well water

State-specific guide for interpreting hardness results in private wells.

Hardness in New York well water

State-specific guide for interpreting hardness results in private wells.

Hardness in North Carolina well water

State-specific guide for interpreting hardness results in private wells.

Hardness in North Dakota well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Ohio well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Oklahoma well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Oregon well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Pennsylvania well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Rhode Island well water

State-specific guide for interpreting hardness results in private wells.

Hardness in South Carolina well water

State-specific guide for interpreting hardness results in private wells.

Hardness in South Dakota well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Tennessee well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Texas well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Utah well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Vermont well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Virginia well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Washington well water

State-specific guide for interpreting hardness results in private wells.

Hardness in West Virginia well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Wisconsin well water

State-specific guide for interpreting hardness results in private wells.

Hardness in Wyoming well water

State-specific guide for interpreting hardness results in private wells.

Keep your well history

Interpret once on the web. Track forever in the app.

Save test history, set annual reminders, compare results over time, and create a shareable report for your family or water professional.

Track Hardness in the iOS app