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公认的硬度划分是:
9 G% O+ \ y+ AWater containing calcium carbonate at
: f+ i: F! x& Z/ J5 ?concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,0 _/ Y" j6 e y9 D% \0 t
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
3 H7 X5 G' p! g* N5 ?" [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:+ q4 N O1 }7 P" h3 j' Q1 i' U- U
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.
5 _& j5 e. p7 n- h5 L6 Q$ j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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