 鲜花( 17)  鸡蛋( 0)
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公认的硬度划分是:
! ?1 U% B! w ~6 E) K5 D$ QWater containing calcium carbonate at& N3 [3 |/ M! e G% a" y! X
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
( z/ ~. }. {& Nmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
' S. W* M& g2 z5 T# m2 r! M4 P: e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:
$ g8 c: \( J& E# g3 {( _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./ y1 @: P6 m. t, D" u
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。+ f5 H7 W k" z5 K$ x
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