| № | 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  | 
 
 | 
2011-05-26 | 17329 | - | 12 | 8.6 | 13.0 | HIGH | Med | HIGH | HIGH | 
| 1 | 182718 | 2011-06-07 | 46110 | - | 7 | 8.2 | 12.0 | HIGH | HIGH | HIGH | HIGH | |
| 2 | 188130 [2-month plot]
 Goedgenoeg 433 IP at Orkney Road Bridge on Jagspruit on R502  | 
 
 | 
2011-05-26 | 11199 | - | 12 | 8.6 | 13.0 | HIGH | Med | HIGH | HIGH | 
| 2 | 188130 | 2011-06-07 | 86640 | - | 6 | 8.2 | 12.0 | HIGH | HIGH | HIGH | HIGH | |
| 3 | 188131 [2-month plot]
 Koekemoerspruit at Buffelsfontein Bridge  | 
 
 | 
2011-05-26 | 326 | - | 3 | 8.0 | 14.0 | HIGH | low | Med | low | 
| 3 | 188131 | 2011-05-26 | 326 | - | 3 | 8.0 | 14.0 | HIGH | low | Med | low | |
| 3 | 188131 | 2011-06-07 | 9600 | - | 3 | 7.7 | 12.0 | HIGH | Med | HIGH | HIGH | |
| 4 | 188132 [2-month plot]
 Orkney - at R30 Bothaville Orkney Bridge on Vaalrivier  | 
 
 | 
2011-05-26 | 21 | - | 33 | 9.1 | 14.0 | HIGH | low | low | low | 
| 4 | 188132 | 2011-06-07 | 0 | - | 17 | 9.3 | 11.0 | low | low | low | low | |
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