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公认的硬度划分是:
/ w8 v5 K& ^) BWater containing calcium carbonate at) p" O8 W! {5 Q7 G* \
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
6 o6 V+ j" ?; v3 o% u6 n, Q l" Dmoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard8 E# a" p7 L' ]
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:! n( r: \/ f& r
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.
3 m, b+ p& }" x; G/ d3 N5 {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。) G8 X2 b! J' Q d$ U) s
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