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公认的硬度划分是:
. G3 n' p+ z6 Q) F. Z' f+ [) EWater containing calcium carbonate at/ K% Z7 P) c6 X# W
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
; D5 E2 \/ @2 W9 zmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
6 I7 C& [9 @3 T& A5 j+ Y4 O; g( N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:
' G5 s" V, m/ {6 o/ A5 b0 ~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.. |+ e5 R$ J3 {
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。3 I2 b* i) \, [* d
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