| № | Site [ view Middle Vaal sites in Google Earth ] |
Plot all data | Date | MPN, or cfu / 100mL |
Turb. NTU |
pH | Temp. oC |
Risk based on E. coli if recorded, otherwise on faecal coliforms | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| E. coli | faecal coliforms | drinking- no treatment |
drinking- limited treatment |
full or partial contact |
irrigation- crops eaten raw |
|||||||
| 1 | 182718 [2-month plot]
Skoonspruit D/S from Orkney Sewage Works |
|
2007-09-03 | 680 | - | 4 | 7.6 | 14.0 | HIGH | low | HIGH | low |
| 1 | 182718 | 2007-09-17 | 1920 | - | 6 | 7.8 | 20.0 | HIGH | low | HIGH | Med | |
| 1 | 182718 | 2007-10-01 | 17300 | - | 125 | 7.1 | 19.0 | HIGH | Med | HIGH | HIGH | |
| 1 | 182718 | 2007-10-17 | 910 | - | 16 | 7.6 | 20.0 | HIGH | low | HIGH | low | |
| 2 | 188130 [2-month plot]
Goedgenoeg 433 IP at Orkney Road Bridge on Jagspruit on R502 |
|
2007-09-03 | 20 | - | 24 | 8.4 | 14.0 | HIGH | low | low | low |
| 2 | 188130 | 2007-09-17 | 60 | - | 11 | 8.0 | 20.0 | HIGH | low | low | low | |
| 2 | 188130 | 2007-10-01 | 43500 | - | 291 | 7.2 | 20.0 | HIGH | HIGH | HIGH | HIGH | |
| 2 | 188130 | 2007-10-17 | 14140 | - | 130 | 7.4 | 22.0 | HIGH | Med | HIGH | HIGH | |
| 3 | 188131 [2-month plot]
Koekemoerspruit at Buffelsfontein Bridge |
|
2007-09-03 | 20 | - | 6 | 7.5 | 16.0 | HIGH | low | low | low |
| 3 | 188131 | 2007-09-17 | 16 | - | 16 | 9.1 | 21.0 | HIGH | low | low | low | |
| 3 | 188131 | 2007-10-01 | 206 | - | 9 | 7.3 | 19.0 | HIGH | low | Med | low | |
| 3 | 188131 | 2007-10-17 | 200 | - | 8 | 7.6 | 20.0 | HIGH | low | Med | low | |
| 4 | 188132 [2-month plot]
Orkney - at R30 Bothaville Orkney Bridge on Vaalrivier |
|
2007-09-03 | 22 | - | 16 | 9.0 | 15.0 | HIGH | low | low | low |
| 4 | 188132 | 2007-09-17 | 16 | - | 16 | 9.1 | 21.0 | HIGH | low | low | low | |
| 4 | 188132 | 2007-10-01 | 58 | - | 19 | 8.3 | 19.0 | HIGH | low | low | low | |
| 4 | 188132 | 2007-10-17 | 90 | - | 23 | 8.1 | 22.0 | HIGH | low | low | low | |
 |
 |