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公认的硬度划分是:& `" |) J, _2 n1 Y+ C3 _
Water containing calcium carbonate at
9 K9 S! L1 c, \$ R) U- `concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
0 R9 D9 X2 X( w8 [" g. \- z! ?moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard/ k i5 U& Y7 H: n% a5 t* l
爱城的水硬度在150-160之间,属于硬水,但不算很硬。这种硬度的水不需要在水厂进行软化处理,适当硬度的水对健康不但无害,反而有益。以下是加拿大主要城市水硬度指标:* V6 ]! V H+ \' |
Montreal 116 ppm,Calgary 165 ppm, Regina 496 ppm, Saskatoon 160-180 ppm, Winnipeg 77 ppm,Toronto 121 ppm,Vancouver < 3 ppm, Charlottetown, PEI 140–150 ppm, Waterloo Region 400 ppm, Guelph 460 ppm.
R) |& _3 t& r: N在家里根本不需要安装什么软化水装置,而且都要把水烧开的做法也不可取,钙和镁都沉降了下来,其实这两种元素都是身体需要的,直接喝冷水最好,如果肚子能适应的话。: b4 a" u8 h8 C$ j, {
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