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公认的硬度划分是:
! F) @1 C4 S" E8 ?Water containing calcium carbonate at
/ g5 |! g5 O4 `/ T+ N8 s4 n; K lconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,* t9 \5 [$ i6 C; g, b: o
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
8 i4 B% I- f( c- a( W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:$ @6 F# e+ o( R* E% O {1 H
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.. V9 n% c1 n& W7 O5 C
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。# ~, {+ S$ G Z
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