Safe drinking water in China Part 2: a comparison of water quality in Lishui and Hangzhou (China) with London (UK)
Published:
Continuing my previous blog post with a comparison of water quality in Lishui (China) with London (UK), I now also include data for Hangzhou (China) obtained on 2024/09/01.
| Chinese | English | Lishui | Hangzhou | London | China limit | UK limit | Unit |
|---|---|---|---|---|---|---|---|
| pH | pH | 8.4 | 7.36 | 7.73 | 6.5-8.5 | 6.50-9.50 | pH |
| 总硬度 | Total hardness as CaCO3 | 48 | 47 | 265 | 450 | mg/L | |
| 砷 | Arsenic as As | <0.09 | 0.3 | 1 | 0.01 | 10 | μg/L |
| 铬 | Chromium as Cr | <4 | <4 | <2.5 | 50 | 50 | μg/L |
| 铅 | Lead as Pb | <0.07 | <0.07 | 2.3 | 10 | 10 | μg/L |
| 汞 | Mercury as Hg | <0.1 | <0.1 | <0.07 | 1 | 1 | μg/L |
| 氰化物 | Cyanide as CN | <2 | <2 | <4.1 | 50 | 50 | μg/L |
| 氟化物 | Fluoride as F | <0.1 | 0.1 | 0.16 | 1 | 1.5 | mg/L |
| 硝酸盐 | Nitrate as NO3 | 3.28 | 1.90 | 29.6 | 10 | 50 | mg/L |
| 溴酸盐 | Bromate as BrO3 | <5 | <5 | 1.3 | 10 | 10 | μg/L |
| 铁 | Iron as Fe | 70 | <0.9 | 5 | 300 | 200 | μg/L |
| 锰 | Manganese as Mn | 3 | <0.06 | 0.6 | 100 | 50 | μg/L |
| 铜 | Copper as Cu | 0.003 | 0.002 | 0.022 | 1 | 2 | mg/L |
| 氯化物 | Chloride as Cl | 3.1 | 5 | 53 | 250 | 250 | mg/L |
| 硫酸盐 | Sulphate as SO4 | 3.6 | 12 | 54 | 250 | 250 | mg/L |
| 三卤甲烷 | Trihalomethanes | <0.041 | 2.1 | 24 | 100 | 100 | μg/L |
Similar to Lishui, the water in Hangzhou shows no evidence of heavy metal contamination. The tap water should therefore be drinkable.