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公认的硬度划分是:
; c1 M( d! n4 _# u1 Z+ xWater containing calcium carbonate at7 s% T) e8 Y' b) [1 U$ }# l- |
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
: @2 {( B8 M' n8 w9 amoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard* ?% m+ T! a# N! \* Z0 H& s
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:9 \, C; {7 N; s
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.
1 k+ K1 v- i( H7 z* X# P% w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。6 [: a2 l) D( m1 t; s
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