| Raw wastewater at the entrance to the station | ||
| BOD5/COD | COD/BOD5 | SS/BOD5 |
Average | 0.44 | 2.29 | 1.39 |
Standard deviation | 0.01 | 0.04 | 0.04 |
Minimum | 0.42 | 2.23 | 1.30 |
Maximum | 0.45 | 2.37 | 1.46 |
Number of samples | 12 | 12 | 12 |