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公认的硬度划分是:
: e& h7 w$ d$ ~6 ^: Z" W7 g% w; ^! iWater containing calcium carbonate at
& ] U+ h; Z) m0 u' j8 ?$ Pconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
6 K* ^3 D7 X0 d* \moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard e! x/ ]' d& {' V
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:
( I- P* m0 `5 h, i% ~ x9 [1 L& YMontreal 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.
1 A; m. e) p1 Q' u/ j7 d+ p6 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。# {2 o2 n7 u8 E# e& _
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