| No. | Sampling sites | Coordinates | Site description |
| 1. | S. Garam | N05˚39.552' E100˚23.983' | Jetty, aqua cultural area and paddy field |
| 2. | K. Juru | N05˚19.683' E100˚22.949' | Industrial area, urbanization and aquaculture |
| 3. | Sg. Puluh | N03˚04.786' E101˚23.903' | Jetty receiving domestic wastes and industrial area |
| 4. | Bg. Lalang | N02˚36.669' E101˚41.100' | Recreational and agricultural areas |
| 5. | M. Beku | N01˚47.746' E102˚53.395' | Jetty receiving domestic wastes and shipping activities |
| 6. | Sg. Tiga | N01˚25.841' E104˚00.281' | Jetty, agricultural and oil plantation |