At this point, sophisticated analyzes are performed when there is suspicion of the following risk factors.
| Physicochemical parameters | Microbiological parameters |
|---|---|
| PCB’s –PCT’s | Salmonella |
| Silver | Pathogenic staphylococci |
| Phenolic compounds | Stool bacteriophages |
| Hydrocarbons dissolved or emulsified – oils | Bowel viruses |
| Surfactants | Escherichia coli (E. Coli) O:157 |
| Phosphorus (P2O5) | Campylobacter |
| Dry residue | Parasitic organisms |
| Potassium | Algae |
| Hydrogen sulfide | Other molded elements (Zohar) |