 鲜花( 17)  鸡蛋( 0)
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公认的硬度划分是:
/ d$ J/ U/ A8 f& ]' Y! K1 lWater containing calcium carbonate at! A2 n9 A1 b" k+ |4 O, z
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l," Y; L# t0 j c. ^- y! M4 H' q+ j- i1 W
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
8 b) ^9 A" u& t' v6 {. }: k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:
+ N6 y, c t0 ~! M5 t) H8 E' e5 c3 j/ ZMontreal 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./ w# Y1 Z" E/ m5 Z* I
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。
) {& n, g( }* u* C4 b2 H! x. g) G F5 [4 _+ D+ W `, M
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