| № | Site [ view Lower 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 | 188487 [2-month plot]
 Gong Gong D/S Barkly West on Vaal  | 
 
 | 
2007-05-03 | 18 | - | - | - | - | HIGH | low | low | low | 
| 1 | 188487 | 2007-05-18 | 70 | - | - | - | - | HIGH | low | low | low | |
| 1 | 188487 | 2007-06-05 | 15 | - | - | - | - | HIGH | low | low | low | |
| 1 | 188487 | 2007-06-19 | 10 | - | - | - | - | HIGH | low | low | low | |
| 2 | 188489 [2-month plot]
 Doornfonteyn Middelplaats D/S Warrenton on Vaal  | 
 
 | 
2007-05-03 | 70 | - | - | - | - | HIGH | low | low | low | 
| 2 | 188489 | 2007-05-18 | 62 | - | - | - | - | HIGH | low | low | low | |
| 2 | 188489 | 2007-06-05 | 66 | - | - | - | - | HIGH | low | low | low | |
| 2 | 188489 | 2007-06-19 | 70 | - | - | - | - | HIGH | low | low | low | |
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