 鲜花( 17)  鸡蛋( 0)
|
公认的硬度划分是:
" H: q& T3 p; R" g2 _ V0 B/ JWater containing calcium carbonate at1 u6 Q) K2 {+ I# D2 u" c
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,0 q9 M- }8 q# T
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard) s* m, Q" K5 P+ {# X! p
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:+ y9 j' |1 }- J
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.
. ~+ a g8 n% X7 j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 Z W8 [1 B% _4 X7 X9 l
" C( c) W8 x1 d) x$ g4 X0 y |
|