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公认的硬度划分是:0 J' R' z3 N7 x2 j
Water containing calcium carbonate at3 A1 N( M% }: T1 p7 D) W
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,) ~+ P+ {2 O2 b$ ]" o" \; ?
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
7 H+ K5 }0 I% D6 I& A8 f+ ?: w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:
8 ~4 b( ^8 B" A! N" `7 }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.* t& M2 ^/ Z1 H& r# k- M2 C
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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