| № | 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 | 90800 [2-month plot]
 Bloudrif - at R30 Road Bridge on Sand River near Mouth of Doornrivier  | 
 
 | 
2016-06-22 | 276 | - | 2 | 8.0 | - | HIGH | low | Med | low | 
| 2 | 90849 [2-month plot]
 Kroonstad - at R76 Road Bridge on Vals River (Old Barend Wessel)  | 
 
 | 
2016-05-27 | 275 | - | 19 | 7.8 | - | HIGH | low | Med | low | 
| 2 | 90849 | 2016-06-23 | 2420 | - | 8 | 7.9 | - | HIGH | Med | HIGH | Med | |
| 3 | 182718 [2-month plot]
 Skoonspruit D/S from Orkney Sewage Works  | 
 
 | 
2016-05-06 | 100 | - | 9 | 8.1 | - | HIGH | low | low | low | 
| 3 | 182718 | 2016-05-17 | 1990 | - | 85 | 7.9 | - | HIGH | low | HIGH | Med | |
| 3 | 182718 | 2016-05-31 | 310 | - | 9 | 8.0 | - | HIGH | low | Med | low | |
| 3 | 182718 | 2016-06-20 | 1460 | - | 24 | 8.0 | - | HIGH | low | HIGH | Med | |
| 4 | 188130 [2-month plot]
 Goedgenoeg 433 IP at Orkney Road Bridge on Jagspruit on R502  | 
 
 | 
2016-05-06 | 242000 | - | 3 | 7.7 | - | HIGH | HIGH | HIGH | HIGH | 
| 4 | 188130 | 2016-05-17 | 1350 | - | 9 | 7.7 | - | HIGH | low | HIGH | Med | |
| 4 | 188130 | 2016-05-31 | 3790 | - | 4 | 7.7 | - | HIGH | Med | HIGH | Med | |
| 4 | 188130 | 2016-06-20 | 520 | - | 5 | 7.5 | - | HIGH | low | HIGH | low | |
| 5 | 188131 [2-month plot]
 Koekemoerspruit at Buffelsfontein Bridge  | 
 
 | 
2016-05-06 | 7 | - | 2 | 7.8 | - | Med | low | low | low | 
| 5 | 188131 | 2016-05-17 | 10 | - | 4 | 7.7 | - | HIGH | low | low | low | |
| 5 | 188131 | 2016-05-31 | 86 | - | 2 | 7.8 | - | HIGH | low | low | low | |
| 5 | 188131 | 2016-06-20 | 16 | - | 3 | 7.8 | - | HIGH | low | low | low | |
| 6 | 188132 [2-month plot]
 Orkney - at R30 Bothaville Orkney Bridge on Vaalrivier  | 
 
 | 
2016-05-06 | 13 | - | 10 | 8.4 | - | HIGH | low | low | low | 
| 6 | 188132 | 2016-05-17 | 15 | - | 16 | 8.7 | - | HIGH | low | low | low | |
| 6 | 188132 | 2016-05-31 | 6 | - | 10 | 8.7 | - | Med | low | low | low | |
| 6 | 188132 | 2016-06-20 | 6 | - | 10 | 8.8 | - | Med | low | low | low | |
| 7 | 191050 [2-month plot]
 Floorsdrift 15 - Hoopstad at R59 Road Bridge on Vetrivier  | 
 
 | 
2016-05-27 | 187 | - | 120 | 7.7 | - | HIGH | low | low | low | 
| 7 | 191050 | 2016-06-23 | 63 | - | 448 | 8.1 | - | HIGH | low | low | low | |
| 8 | 192624 [2-month plot]
 Buffelsfontein 443 IP - at Midvaal Intake  | 
 
 | 
2016-05-06 | 22 | - | 12 | 8.4 | - | HIGH | low | low | low | 
| 8 | 192624 | 2016-05-17 | 16 | - | 10 | 8.6 | - | HIGH | low | low | low | |
| 8 | 192624 | 2016-05-31 | 9 | - | 10 | 8.8 | - | Med | low | low | low | |
| 8 | 192624 | 2016-06-20 | 15 | - | 8 | 8.8 | - | HIGH | low | low | low | |
| 9 | 194792 [2-month plot]
 Bothaville - at R59 Road Bridge Over Vals Rivier  | 
 
 | 
2016-05-25 | 15 | - | 5 | 7.5 | - | HIGH | low | low | low | 
| 9 | 194792 | 2016-06-21 | 1203 | - | 2 | 7.6 | - | HIGH | low | HIGH | Med | |
| 10 | 194793 [2-month plot]
 Makwassie - at R502 Road Bridge Over Makwassie Spruit  | 
 
 | 
2016-05-25 | 52 | - | 4 | 7.5 | - | HIGH | low | low | low | 
| 10 | 194793 | 2016-06-21 | 2420 | - | 2 | 7.7 | - | HIGH | Med | HIGH | Med | |
| 11 | 194794 [2-month plot]
 Rietfontein 299 - at R501 Road Bridge Over Renoster River  | 
 
 | 
2016-05-27 | 428 | - | 39 | 7.7 | - | HIGH | low | HIGH | low | 
| 11 | 194794 | 2016-06-22 | 152 | - | 32 | 8.1 | - | HIGH | low | low | low | |
| 12 | 194795 [2-month plot]
 Corannakraal 87 - at Road Bridge Over Vet Rivier D/S of Erfenis Dam Wall  | 
 
 | 
2016-05-27 | 41 | - | 107 | 8.4 | - | HIGH | low | low | low | 
| 12 | 194795 | 2016-06-23 | 108 | - | 159 | 8.2 | - | HIGH | low | low | low | |
| 13 | 194799 [2-month plot]
 Odendaalsrus - at Water Channel (Drain) in Odendaalsrus  | 
 
 | 
2016-05-26 | 0 | - | 2 | 9.3 | - | low | low | low | low | 
| 13 | 194799 | 2016-06-22 | 2420 | - | 7 | 8.3 | - | HIGH | Med | HIGH | Med | |
| 14 | 194801 [2-month plot]
 Welkom Thabong Township - at Water Channel in Thabong Township  | 
 
 | 
2016-05-26 | 196 | - | 25 | 7.4 | - | HIGH | low | low | low | 
| 14 | 194801 | 2016-06-22 | 2420 | - | 18 | 7.4 | - | HIGH | Med | HIGH | Med | |
| 15 | 194803 [2-month plot]
 Henneman Phomolong Township - at Water Channel in Phomolong Township  | 
 
 | 
2016-05-26 | 1986 | - | 5 | 7.7 | - | HIGH | low | HIGH | Med | 
| 16 | 194804 [2-month plot]
 Zandrivierspoort 213 - at Road Bridge Over Sand River  | 
 
 | 
2016-05-27 | 56 | - | 59 | 7.5 | - | HIGH | low | low | low | 
| 16 | 194804 | 2016-06-23 | 387 | - | 56 | 7.9 | - | HIGH | low | Med | low | |
| 17 | 194805 [2-month plot]
 Proklameersdrift - at Road Bridge on Vals Rivier  | 
 
 | 
2016-05-26 | 197 | - | 40 | 7.8 | - | HIGH | low | low | low | 
| 17 | 194805 | 2016-06-21 | 816 | - | 7 | 8.5 | - | HIGH | low | HIGH | low | |
| 18 | 195409 [2-month plot]
 Klerksdorp - at Klerksdorp Correctional Service on Skoonspruit  | 
 
 | 
2016-05-25 | 407 | - | 4 | 7.5 | - | HIGH | low | HIGH | low | 
| 18 | 195409 | 2016-06-21 | 2420 | - | 8 | 7.6 | - | HIGH | Med | HIGH | Med | |
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