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公认的硬度划分是:
2 ^7 I N! M" i% Q: z3 iWater containing calcium carbonate at. {; J2 I3 ]- O% Y* c
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
/ D- I7 C7 b! B# `moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
! {: @! F. L* @. x# Y) z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:! Y" b6 R3 @3 a! _; K
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.; r4 A, M# ^" O1 t" m) W1 D
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 l0 E- D/ H7 q' x9 W. a" E2 z9 e
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