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公认的硬度划分是:! D( w1 U! i0 s# v% E8 W
Water containing calcium carbonate at9 x1 |# ?+ r; X9 Q/ }% x0 H$ U
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,2 j9 ?! g( P! p8 |9 i5 ^9 C
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard. S( i' ~! u( w! Z' V- S' g4 p# }# J* v( V
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:
# o7 Q4 a# E. s* ]7 i6 P' KMontreal 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.1 ]7 f3 r$ p4 P
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。% l. e( L. X% M: R8 h* F
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