| № | 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  | 
 
 | 
2007-09-04 | 25 | - | - | - | - | HIGH | low | low | low | 
| 1 | 188487 | 2007-09-18 | 8 | - | - | - | - | Med | low | low | low | |
| 1 | 188487 | 2007-10-02 | 89 | - | - | - | - | HIGH | low | low | low | |
| 1 | 188487 | 2007-10-17 | 19 | - | - | - | - | HIGH | low | low | low | |
| 2 | 188489 [2-month plot]
 Doornfonteyn Middelplaats D/S Warrenton on Vaal  | 
 
 | 
2007-09-04 | 11 | - | - | - | - | HIGH | low | low | low | 
| 2 | 188489 | 2007-09-18 | 1 | - | - | - | - | Med | low | low | low | |
| 2 | 188489 | 2007-10-02 | 89 | - | - | - | - | HIGH | low | low | low | |
| 2 | 188489 | 2007-10-17 | 95 | - | - | - | - | HIGH | low | low | low | |
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