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公认的硬度划分是:
7 Q" q- z& a, ]& J- {; Z3 uWater containing calcium carbonate at2 p- N- q3 x- w
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,$ I% X6 u4 {6 r6 I% X0 x! w
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
- f \$ x2 t& D- @- F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:( z# m- y) E" {
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.( }+ g: u4 b) P+ D5 N" 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。+ v# u/ D9 w/ q% G. s4 O: K
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