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公认的硬度划分是:
' T1 r$ c, Q$ B$ r& m+ nWater containing calcium carbonate at
4 R8 w% Y6 w1 Z! L" m, }; |concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
/ u% k$ g$ Z) x% [& C2 xmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
) b" I- n. w8 [$ {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:/ n" C3 V7 X' F9 Z$ L
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.
2 Z( k7 k# \1 @7 N I I9 @0 \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。/ u# e, Q3 R6 s' @" b
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