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公认的硬度划分是:
2 h) R; A0 _7 rWater containing calcium carbonate at
+ D7 n$ Z+ p V; Y+ C9 j" gconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
1 a+ F8 y' A" ~+ S, g5 C5 n2 ?moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard- r$ v6 F) Z R. n8 t
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:
4 B* w) t+ I2 {4 B7 t& I YMontreal 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.& M/ ~4 E) p O) B; Y3 P
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。; O. d0 W+ O7 N
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