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公认的硬度划分是:) @ `3 V. E2 q4 q/ M" _
Water containing calcium carbonate at- O% V% c0 |2 ?# ]/ @0 P
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
7 e3 [7 N! G& j9 p. K! g+ I5 j A4 vmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard4 _- u* m- r& `: s$ r+ x: X$ R
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:
1 L: X! x) [8 A+ \+ EMontreal 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.. |; e' n& r: B$ e' }) Y" ?1 o/ }
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。+ ]# H9 u% W$ m
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