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公认的硬度划分是:+ U' X+ p3 }0 V* X
Water containing calcium carbonate at
3 C" L7 `, ^0 ^0 hconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,, s0 M- K9 ^6 i/ |9 d% J f
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
8 n7 o; O9 T, x0 u- G" _8 g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:
- G2 p7 g5 t) J/ S5 ~# v+ P# nMontreal 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.
: S/ o1 d' \5 K8 g3 r9 s/ Z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。) K; I# W$ ^ D/ |0 P: j
$ `: }( l/ X9 m) m. ]7 J+ {1 k( h
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