| № | 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 | 101770 [2-month plot]
 Smidts Drift Outspan 23 Schmidtsdrift at Weir on Vaal River  | 
 
 | 
2011-02-16 | 6 | - | - | - | - | Med | low | low | low | 
| 2 | 188487 [2-month plot]
 Gong Gong D/S Barkly West on Vaal  | 
 
 | 
2011-01-14 | 579 | - | - | - | - | HIGH | low | HIGH | low | 
| 2 | 188487 | 2011-01-31 | 248 | - | - | - | - | HIGH | low | Med | low | |
| 2 | 188487 | 2011-02-16 | 2 | - | - | - | - | Med | low | low | low | |
| 3 | 188489 [2-month plot]
 Doornfonteyn Middelplaats D/S Warrenton on Vaal  | 
 
 | 
2011-01-14 | 111 | - | - | - | - | HIGH | low | low | low | 
| 3 | 188489 | 2011-01-31 | 387 | - | - | - | - | HIGH | low | Med | low | |
| 3 | 188489 | 2011-02-16 | 0 | - | - | - | - | low | low | low | low | |
| 4 | 192536 [2-month plot]
 Pampierstad - at Vaal-Harts Weir on Hartsrivier  | 
 
 | 
2011-02-16 | 2 | - | - | - | - | Med | low | low | low | 
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