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公认的硬度划分是:$ M8 z: I0 H% o) [; ^# K' n
Water containing calcium carbonate at
" l- N. n2 `+ A5 g9 g" Mconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
; z( K- b8 L! C, `+ F7 tmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
! X# c! s1 F4 w- b C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:+ l9 R$ ^5 z+ f/ e% G
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.% M* T" \4 J7 w/ K3 X' 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。
' j( m+ i2 ?( b; c, Q2 g5 M. d7 ?$ m5 {, M F: I
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