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公认的硬度划分是:
1 P. T7 e; h- B( c( r1 `* |Water containing calcium carbonate at! l. B2 @: J1 I8 G+ W
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,2 g! K" ], o$ B/ K9 `# a7 W
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
4 N. b, Q6 P- d4 P9 Q, E" ]: A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:+ _' L8 C" J/ O3 [3 s9 G! V
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.* E( q( p* }7 V% m3 m# 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。2 {0 J1 Y6 R& O, t) ]# b
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