 鲜花( 17)  鸡蛋( 0)
|
公认的硬度划分是:4 x) h' h. P, ~! c1 l+ `; B! J
Water containing calcium carbonate at
$ \7 z U' T' E, |concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,9 A' W0 {8 ^- `' H, P& w, \
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
' w L% P. f2 I' c8 T/ e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:& G+ a" O% \' o- h+ @7 |& `9 [
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.
0 X; i* x U0 L7 L0 h$ s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。
) A7 V3 t9 z" [+ n+ A: l- \: ]) J
|
|