The dominant reasons of water hardness are
due to the exit of calcium and magnesium ions in the
water. It is noteworthy to mention that hardness of
water increases the cost of industrial and living
activities. In many developed countries the hardness of
water is deeply and broadly investigated. In developing
countries such as Afghanistan, limited studies are
available that have investigated this issue. Therefore,
this study aims to investigate the hardness of water
from deep wells as well as gully in different regions of
Khost city, Afghanistan. We have collected data from 8
deep water wells and a gully located in different areas.
It was observed that the permanent hardness of water
was small; hence it was not considered in this study.
Then we focused on investigation of temporary
hardness of water from the above-mentioned sites.
Keywords : Hardness, Water, Afghanistan, Deep Water Wells, Gully.