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公认的硬度划分是:+ w/ |+ d( J& c. }2 @
Water containing calcium carbonate at
1 E0 O5 S0 q! m9 `0 @concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,) i7 F# Y" @, }/ ]# l) H, e" Q( Z
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard# |7 Y& h" S0 L0 ^. C
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:
$ W. r* U! k, q5 b, U! GMontreal 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.) \+ p$ i" A5 D+ C3 d# l
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。2 A- w- D8 C9 R/ O9 m. |
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