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公认的硬度划分是:
* { v3 n8 T& C4 Z, DWater containing calcium carbonate at
5 i+ _; p, z) F0 d6 ]) iconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,: f% K' S1 ^$ f" j9 M: K
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
- ]3 V* q5 B- d l5 M3 T. i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:
- e! g( o8 o/ k( @; Y! O8 ~) T- ~' WMontreal 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., G& p6 b; Y$ u: [2 w* [6 m9 I
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。' Q) S% O1 W g- v
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