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公认的硬度划分是:1 v- G; S! V) j) _: R3 Z
Water containing calcium carbonate at
6 n( N7 [' S% j- z0 Tconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
$ K! ~6 z0 f& s3 Q+ G. @( Smoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard1 N& s) B6 q i, F
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:+ R, A. n0 F: z/ [, g9 I5 ~4 h; _+ C
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.
5 `1 p" d1 {" Z% w8 R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。3 {, R9 n9 I; }5 ^. Y# O; R
/ }$ g2 [2 _0 J6 x0 F
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