Test items Water samples | pH | Suspended matter | Chemical oxygen demand | Ammonia nitrogen |
Mine water 1 # in the central | 8.09 | 7.5 | <10 | <0.025 |
Mine water 1 # in the south | 8.56 | <4 | <10 | <0.025 |
Domestic sewage 1 # in the central | 8.26 | <4 | <10 | 0.21 |
Domestic sewage 1 # in the south | 8.25 | <4 | <10 | 2.54 |
Mine water 2 # in the central | 8.27 | 14 | <10 | 0.12 |
Mine water 2 # in the south | 8.61 | 10 | <10 | 0.14 |
Domestic sewage 2 # in the central | 8.43 | 13 | <10 | 0.12 |
Domestic sewage 1 # in the south | 8.11 | 13 | 12 | 6.11 |
Mine water 3 # in the central | 8.07 | 4 | <10 | 0.025 |
Mine water 3 # in the south | 8.53 | <4 | <10 | 0.06 |
Domestic sewage 3 # in the central | 7.93 | 4 | <10 | 0.22 |
Domestic sewage 1 # in the south | 7.73 | 6 | <10 | 4.37 |
Level 1 standard of GB8978-1996 | 6 - 9 | 70 | 100 | 15 |