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公认的硬度划分是:
5 y4 y2 J. R7 A" y+ n1 u" g FWater containing calcium carbonate at* V+ Y' G8 V& p% e/ b- B/ o8 k7 ]7 h
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
: e) `. U- e5 ~moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
$ N" e: m% @1 o/ j9 k, L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:/ a+ X: c5 S/ R7 Q4 {4 O5 g# F
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.
6 y, C, c7 \# O8 D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。% X0 m1 ^( W+ V4 r! Q
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