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公认的硬度划分是:
6 E% w0 k/ X A; B. ?Water containing calcium carbonate at
$ Z/ ]6 F* y6 x8 I5 L1 _& H' _concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
/ B; I" y4 a2 f7 A8 P( W2 `% fmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
4 w# c* l" M7 A. N# o1 n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: e z& ]& E+ {, j- n
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. i) `& s8 i+ x! f2 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。9 y) h2 H( x V
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