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公认的硬度划分是:
/ ~" @! g- p0 }6 ZWater containing calcium carbonate at
, ?5 J( b) M* Q) t7 U2 U6 M oconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,# F% [# @# @. H t" | n
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
; k8 M' n5 g2 z6 T) S1 Y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:6 n; j1 j7 B: Y: o. 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.
' x" o& Z$ V0 i: 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。! z$ }" O' W! S- k! R( ?8 f9 J
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