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公认的硬度划分是:
+ n+ @; r2 {6 BWater containing calcium carbonate at% m( L0 Y2 z" q4 G b8 O4 t2 |7 o
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,& o2 n: h* Z# y6 J3 G1 f; N
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
K# f3 A; J$ p6 ^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:
5 P9 B9 `1 V( s4 @' ^( Y+ sMontreal 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.
2 N: [: q# A' ~* |7 N% `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。" J" x# r" ~8 t# D5 x# y0 `: H/ G
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