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公认的硬度划分是:* K- O; Q/ }, t2 f
Water containing calcium carbonate at3 f# f# { @1 j
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
: U Y3 b$ V4 y* X t+ R! S1 omoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard+ w$ I4 g7 n2 e8 e
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:; b6 x5 @( z1 Z" P( U5 R
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.
$ H, C0 K* _) M K: {* H& {: T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。+ _$ \% m6 |+ t; g
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