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公认的硬度划分是:3 i) e5 }7 a: T- B3 q
Water containing calcium carbonate at
! _/ Z7 T) ~ k( B9 Y) S: ^+ z: Lconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,' w- _8 A" c+ h: |: m" ~3 J- v* M
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
& a" Z. ^+ X* r" ]3 j0 q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:2 n. c3 V1 O; ~: 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.2 v; B" G, ^2 W$ K4 w6 r
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。" P4 S$ t* I% v8 ]( |; L3 {5 b& T
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