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公认的硬度划分是:2 Z0 O& O9 x, A7 ~. I/ T. Q
Water containing calcium carbonate at
! r' I- C$ d) p8 P. @% s( o1 ^concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,: w2 L* f: P7 _8 U
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
7 T! L0 n0 T+ m1 j# T7 B# g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:
g7 d. b+ h E; gMontreal 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.
: @ B- V& G) q; [! c% 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。& c/ i- K+ ?+ A8 H( d
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