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公认的硬度划分是:) Q8 k9 S* ~6 B" O5 q5 C
Water containing calcium carbonate at
% |- b, o- n; z( j0 k) Vconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
/ v: L, f% v1 ~8 s) `2 wmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
$ f& E0 x# M( E0 ?& s' M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:
' y. `: t- v# D, zMontreal 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/ z# Q! }3 P- Q
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。3 U y- ]+ l# [' Z% s
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