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公认的硬度划分是:
" R. q# I: H/ g: i: [/ N0 U6 kWater containing calcium carbonate at
" @) _$ H2 r. t ?0 econcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
6 k% X$ E7 g' Z) omoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
% b" \- a& ~+ S& m5 \4 J) f7 }9 ]" G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:% I, ?. W5 E# E' n3 h
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.9 s- v& y2 a3 q4 ^, x
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。! @ b+ \, A& w1 Q; X* S
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