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公认的硬度划分是:6 K8 A+ I- u0 i# C; f! N- \+ F
Water containing calcium carbonate at. ~3 R4 d9 R r) f4 A
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l, o# y8 v2 J( m: l
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
! g, E+ z4 c9 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:9 P1 R7 |' U( R9 W2 l0 X
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.
8 z- o1 s8 s7 [: c" |9 p1 R/ H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。( ^6 ~9 O# L" m# M! b: g
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