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公认的硬度划分是:
: ^9 f& n& k* R: xWater containing calcium carbonate at/ Y3 p/ S; J3 m8 Q9 r4 X( T
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
3 l$ k, T b& {. B8 i, @, bmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
# f/ S0 k0 b5 {. ~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* R- W( k4 l* p. X% j2 K" T
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.2 z- |) ?( H+ D# g o
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。4 q* g7 j9 w: h8 b, m+ `
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