| Basin | Stream | Station | Geographic coordinate | Characteristics of the sampling station | ||||
| Altitude (m) | Latitude | Longitude |
| |||||
| Wouri | Kondi | KO | 7 | 04˚04'05.9''N | 09˚45'13.9''E | Marshy zone receiving urban wastes | ||
| Longmayagui | LM | 22 | 04˚00'29.4''N | 09˚45'00.4''E | Marshy zone receiving urban wastes | |||
| Mboppi | MP | 4 | 04˚02'41.0''N | 09˚42'43.8''E | Marshy zone receiving household, urban and industrials wastes | |||
| Mgoua | MG | 22 | 04˚01'19.6''N | 09˚42'22.4''E | Receptacle of urban and industrials wastes | |||
| Tongo-bassa | TW | 6 | 04˚05'06.3''N | 09˚43'22.9''E | Receptacle of urban and industrials wastes This station also received salty water from the Wouri | |||
| TB | 9 | 04˚03'44.2''N | 09˚43'14.3''E | Receptacle of urban wastes and industrials wastewater from SIC CACAO | ||||
| Mbanya | MB | 5 | 04˚04'20.3''N | 09˚42'08.6''E | Receptacle of urban and industrials wastes | |||
| Wouri | WO | −5 | 04˚04'20.3''N | 09˚42'08.6''E | Receptacle of urbanwastes Traditional fishing | |||
| Sanaga | Mabandi | M1 | 36 | 03˚47'12.4''N | 10˚07'33.2''E | Rural area with no house in a 300-m radius around the sampling station, no industrial activities | ||
| M2 | 17 | 03˚47'58.1''N | 10˚07'21.5''E | Receptacle of urban and industrials wastes | ||||
| M3 | 13 | 03˚48'10.4''N | 10˚07'24.0''E | Receptacle of urban and industrials wastes | ||||
| Boue | B1 | 65 | 03˚46'46.0''N | 10˚08'09.0''E | Rural area with no house in a 500-m radius around the sampling station | |||
| B2 | 44 | 03˚47'27.0''N | 10˚07'59.2''E | Rural area with no house in a 200-m radius around the sampling station | ||||
| B3 | 40 | 03˚47'39.3''N | 10˚07'58.7''E | Confluence zone with the Sanaga river Lack of riparian vegetation | ||||
| Sanaga | S1 | 16 | 03˚48'26.7''N | 10˚07'37.5''E | Lack of riparian vegetation, high rate of flow | |||
| S2 | 12 | 03˚48'12.4''N | 10˚07'24.2''E | Lack of riparian vegetation, high rate of flow | ||||