 鲜花( 17)  鸡蛋( 0)
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公认的硬度划分是:
7 E+ ?6 a8 ~" G& w% |Water containing calcium carbonate at
1 X, E5 k( }- r! m _+ N, N3 fconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,4 x0 p: ?3 _- p1 P7 A
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard* `# q5 k; a2 H
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 ?1 k. d8 n# U1 C6 P- N3 x' q% V( e( OMontreal 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.
' u# d5 j; l1 U& c+ P* m8 t; [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。
9 B: U( v/ C3 c5 Y0 q5 |0 o% J1 ]# B
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