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公认的硬度划分是:' c5 z$ K7 m% m4 r- j- `
Water containing calcium carbonate at
7 o6 B$ {( C( aconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,( l, O/ A. R' W' b: ?5 \
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard+ Q0 }3 k4 X4 J8 H' ]7 X" e
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:% q/ {' e5 w9 F$ g( g0 m
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.
1 F" j2 Y E3 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。* x& ^5 S8 F' x+ j8 k, l/ V
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