| Parameter | WHO guideline | Cotonou | |||||
| GRS | SDS | SRS | GDS | Max | Min | ||
| Total coliforms (UFC/100mL) | 0 | 360 | 249 | 464 | 875 | 1812 | 112 |
| Escherichia coli (UFC/100mL) | 0 | 243 | 145 | 200 | 333 | 780 | 40 |
| Faecal enterococci/streptococci (UFC/100mL) | 0 | 286 | 188 | 124 | 285 | 736 | 18 |
| Sulphite reducing clostridia (UFC/20mL) | 0 | 23 | 17 | 19 | 8 | 112 | 0 |
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|
| Lomé | |||||
| GRS | SDS | SRS | GDS | Max | Min | ||
| Total coliforms (UFC/100mL) | 0 | 114 | 108 | 75 | 50 | 1000 | 1 |
| Escherichia coli (UFC/100mL) | 0 | 12 | 1 | 7 | 1 | 112 | 1 |
| Faecal enterococci/streptococci (UFC/100mL) | 0 | 6 | 19 | 6 | 13 | 118 | 1 |
| Sulphite reducing clostridia (UFC/20mL) | 0 | 3 | 10 | 2 | 12 | 74 | 1 |