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公认的硬度划分是:
5 `6 X: r& `$ i% z. U) pWater containing calcium carbonate at
5 X* b8 p, I# dconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
1 Z. {8 m. c8 I5 C: }4 y3 j7 Rmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
+ ~1 Q9 T7 w5 L9 h6 x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:: a# y& Z* ?) f* k. K6 o
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.$ c1 q! o3 x! N' j" z+ h
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。! p' e$ L, k* r1 T, x, P
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