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公认的硬度划分是:
; J/ n% k/ c& u v" ]Water containing calcium carbonate at* a! u2 l- W( b( U* j; O0 w. O! N
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
% x4 B' c2 }( k9 ?& i. f, E) r7 \moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
5 L" A; x6 ?" M# F* s( X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:
, ]( p* Z) a$ {5 v+ C* @3 @" |! q3 ~2 pMontreal 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.
: c K9 S2 ~, O# G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。1 l1 U& g6 p; e8 Z* |
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