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How to measure hard water?

Published in Water Hardness Testing 1 min read

Here's a simple method to determine if your water is hard:

Simple Soap Test

This method, based on observing how soap interacts with your water, can give you an indication of water hardness.

Steps:

  1. Collect Water Sample: Fill a clean bottle about one-third full with water directly from your tap.
  2. Add Soap: Add a few drops of pure liquid soap to the bottle.
  3. Shake: Secure the lid and shake the bottle vigorously for approximately 15 seconds.
  4. Observe: Set the bottle down and carefully observe the solution.

Interpretation:

  • Hard Water Indication: According to the reference, if there are no fluffy bubbles in the water or it appears cloudy and/or milky, your water is hard.

In essence, the soap struggles to lather properly in hard water due to the presence of minerals like calcium and magnesium, which interfere with the soap's ability to create bubbles.