Hardness of water analysis at the Grotowice intake situated near Opole

¹ Opole University of Technology, Mechanical Department, 45-271 Opole Mikolajczyka 5 St., Poland
² Wodociągi i Kanalizacja Sp. z o.o. w Opolu, Opole, 45-222 Oleska 64 St., Poland

^* Corresponding author: i.klosok-bazan@po.opole.pl

Abstract

The determination of raw water hardness subsequently treated and used for domestic water supplies is a useful parameter to characterize the present total dissolved solids as well as for calculation dosages for lime-soda softening application. Because water hardness concentrations have not been proven to be health related, the final achieved level is mainly an economic function. To identify existing trends, the changes in water hardness in Grotowice intake for the years 1999-2017 have been analysed. The obtained results indicate clearly that the water hardness in three wells shows a slight downward trend, but on the other hand, one trend is rising in another direction.