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公认的硬度划分是:
- `* p* ~( \9 E9 U% j( SWater containing calcium carbonate at7 ]2 I! s5 x/ b! h' ~
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,' } j) `% @- W3 C' T% L) m0 N/ K
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard+ x' `3 k( i7 u; m5 X- D' F5 x
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& C: E9 {$ i* o
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., y! D) A% j+ I5 M$ _ P" m
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。7 a, ~$ O+ D# R" C7 K
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