| № | Site [ view Upper 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 | 90697 [2-month plot]
 (B8) Nigel R51 Road Bridge to Balfour  | 
 
 | 
2023-03-28 | 288 | - | - | - | - | HIGH | low | Med | low | 
| 1 | 90697 | 2023-04-12 | 813 | - | - | - | - | HIGH | low | HIGH | low | |
| 1 | 90697 | 2023-04-25 | 121 | - | - | - | - | HIGH | low | low | low | |
| 2 | 90725 [2-month plot]
 Klip River at R41 Witpoortjie U/S Durban Deep Mine  | 
 
 | 
2023-03-28 | 82 | - | - | - | - | HIGH | low | low | low | 
| 2 | 90725 | 2023-04-12 | 61 | - | - | - | - | HIGH | low | low | low | |
| 2 | 90725 | 2023-04-25 | 45 | - | - | - | - | HIGH | low | low | low | |
| 3 | 90727 [2-month plot]
 At Golden Highway Olifantsvlei van Wyk on Kliprivier  | 
 
 | 
2023-03-28 | 435200 | - | - | - | - | HIGH | HIGH | HIGH | HIGH | 
| 3 | 90727 | 2023-04-12 | 456900 | - | - | - | - | HIGH | HIGH | HIGH | HIGH | |
| 3 | 90727 | 2023-04-25 | 613100 | - | - | - | - | HIGH | HIGH | HIGH | HIGH | |
| 4 | 191693 [2-month plot]
 - Soweto Eldoradopark - at Road Bridge on Klipspruit  | 
 
 | 
2023-03-28 | 156500 | - | - | - | - | HIGH | HIGH | HIGH | HIGH | 
| 4 | 191693 | 2023-04-12 | 307600 | - | - | - | - | HIGH | HIGH | HIGH | HIGH | |
| 4 | 191693 | 2023-04-25 | 579400 | - | - | - | - | HIGH | HIGH | HIGH | HIGH | |
![]()  | 
![]()  |