Hardness is an important water quality parameter especially when water is used for drinking purpose. Hardness of water is attributed to the presence of alkaline earth cations like calcium, magnesium, strontium and barium.
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Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/problem-hardness-groundwater-alwar-city
[2] http://admin.indiaenvironmentportal.org.in/category/author/jaya-gupta
[3] http://admin.indiaenvironmentportal.org.in/category/author/m-p-s-chandrawat
[4] http://admin.indiaenvironmentportal.org.in/category/journal/tidee
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-quality
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rajasthan
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/alwar-t
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/statistics
