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公认的硬度划分是:
9 M' J7 [: s# b9 A1 d% qWater containing calcium carbonate at7 X1 O# x" E: Q6 Y# S
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,4 ~& M( t% N2 {5 `0 [
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard R; C" Z0 u* l6 |( X1 d2 u
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:
# \- Y, S% P' J6 n8 r9 C- Q: R9 sMontreal 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.+ p1 B# _7 H1 g! G9 B; Z$ {) v' e0 P
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。: {! t2 m0 {/ g" E( c" Z0 I
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