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公认的硬度划分是:0 X% c, g; n7 D ^ u' ~9 V, O
Water containing calcium carbonate at
1 N5 _" W% {2 D k4 n9 ]& Lconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
; m& ~7 T% Y9 @2 y, x3 M; a) Omoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
$ z5 M* p6 E( g$ p4 |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:
/ k$ U* S- G$ o9 ] _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.7 k6 e1 K) S4 \
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。& y0 n8 V$ }+ B6 q
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