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公认的硬度划分是:5 {' @) G7 Z7 i& [0 M) F
Water containing calcium carbonate at
8 ~7 ]2 T6 U1 T5 uconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l, G+ X1 N+ R& f, Y
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard _5 Q! P2 T3 {: T8 q. ~6 Y. `& \
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:- T) @/ t# b, i' f( B# B
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.
) O* ~- p3 z4 t T1 w* I, E: ]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。 p7 S8 @- k5 v9 d
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