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公认的硬度划分是:- a; H. L& R% B* w# S0 t
Water containing calcium carbonate at6 g& ~ u. Q, Q: Y' u
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,/ s, D9 a- g; f
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard) i- A# [9 x' d9 E( a
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:
' S8 {, ~5 }5 ^3 B# o( w( BMontreal 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 p2 N) N; U1 _ c6 r) n
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。/ M$ t5 K9 A" s3 l7 r4 [. R: h% \6 J
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