| Bacterial species | Number (%) | ||
| UNICAL | MSWD | MW | |
| Escherichia | 36 (22.1) | 52 (14.2) | 27 (7) |
| Clostridium | 16 (9.8) | 0 | 23 (6) |
| Streptococcus | 26 (16) | 26 (7.1) | 29 (7.6) |
| Desulfatomaculum | 0 | 0 | 23 (6) |
| Cladosporium | 0 | 0 | 37 (9.6) |
| Methanococcus | 0 | 0 | 21 (5.5) |
| Micrococcus | 43 (26.4) | 40 (10.9) | 39 (10.2) |
| Bacillus | 11 (6.7) | 38 (10.4) | 32 (8.3) |
| Ferro-thiobacilllus | 0 | 0 | 42 (10.9) |
| Acidithiobacillus | 0 | 0 | 46 (12) |
| Thiobacillus | 0 | 0 | 31 (8.1) |
| Staphylococccus | 24 (14.7) | 39 (10.6) | 19 (4.9) |
| proteus | 5 (3.1) | 14 (3.8) | 9 (2.3) |
| Pseudomonas | 2 (1.2) | 0 | 6 (1.6) |
| Chromobacterium violaceum | 0 | 42 (11.4) | 0 |
| Salmonella | 0 | 30 (8.2) | 0 |
| Shigella | 0 | 35 (9.5) | 0 |
| Serratia | 0 | 11 (3) | 0 |
| Enterobacter | 0 | 25 (6.8) | 0 |
| Klebsiella | 0 | 15 (4.1) | 0 |
| Total | 163 | 367 | 384 |