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公认的硬度划分是:
+ c2 H5 w7 w5 O8 hWater containing calcium carbonate at6 n% z+ O) Y) e7 s1 T
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
" }! U2 h3 }; E7 ~3 d( @+ @9 m- ~% ?moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard6 I( @2 t& ^8 {( e% w; b
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:1 Q, ^# T. Z" i1 k% l
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.
6 ]/ Y6 M3 H s9 q. b5 n) 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。
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