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公认的硬度划分是:/ S% y/ r& m# N% k% s
Water containing calcium carbonate at
9 d) u E# j: y3 Y" t+ k6 Wconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
6 c" j) y# c; _ qmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard7 o) B' ]$ g' w: e3 y& u. _
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:9 ^! ]1 d( C* t- n8 r& x6 ?
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.
3 M8 D7 f) _5 O6 v; w4 `1 D$ 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。$ I* z7 P" @3 }( Z; X7 E6 k
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