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公认的硬度划分是:+ V9 Y' W( F0 ~5 V* q- y
Water containing calcium carbonate at) R' ]$ Q! ?: c7 X) |
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,; S+ z6 j& R% v9 N( o; {- S" x$ p4 e
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
4 N) |& u( L- B% p5 D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:* S" E' G; ?6 a: B; {% V3 B
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.
4 A9 J9 {9 r; @) ~6 x7 I6 o+ i8 n: l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。: v. Z9 z7 ^+ z! u. c9 S1 o3 s- [- g% @
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