 鲜花( 17)  鸡蛋( 0)
|
公认的硬度划分是:
8 `; t3 r2 r! E' lWater containing calcium carbonate at
5 h0 _5 w8 Q) [4 ^0 bconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
( N V, g! g5 v q9 h" _* Mmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
% P( W) w* o- s! H: m5 V$ z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:
" l0 W& Q) |' f2 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.
1 ?1 V- f& J6 \' 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。
5 ~) [) S# w9 z9 W
7 ~) t. q; k6 C9 [% o |
|