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公认的硬度划分是:1 H, J3 r; U) v# [
Water containing calcium carbonate at
2 D: M' g# E7 |7 p' A+ M$ Fconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,8 v/ K# v7 S# p
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
2 [+ P7 z y7 d5 s" J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& ]: ~" y" R! N6 U! L6 z. Y; K7 b. E2 L
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 T* ~2 V' {1 v7 `6 o2 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。
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