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公认的硬度划分是:
3 _4 v& M+ [5 y) v+ ~Water containing calcium carbonate at
+ x: V) {' o" M: g$ n3 U; T ]+ oconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
: r6 e+ J+ M6 o8 a* C- @. t# N6 ]moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
0 _; k4 \; t# v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:5 y+ k1 k& c" }( K
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.
! B. I+ h% m) X; P6 a9 ^6 w" D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 s/ B5 f3 @) ?2 A9 b$ J5 K6 D
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