| № | 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  | 
 
 | 
2016-07-27 | 4839 | - | 564 | 7.5 | - | HIGH | Med | HIGH | HIGH | 
| 1 | 90800 | 2016-08-25 | 2 | - | 6 | 8.4 | - | Med | low | low | low | |
| 2 | 90849 [2-month plot]
 Kroonstad - at R76 Road Bridge on Vals River (Old Barend Wessel)  | 
 
 | 
2016-07-28 | 2420 | - | 18 | 7.8 | - | HIGH | Med | HIGH | Med | 
| 2 | 90849 | 2016-08-24 | 101 | - | 2 | 8.1 | - | HIGH | low | low | low | |
| 3 | 182718 [2-month plot]
 Skoonspruit D/S from Orkney Sewage Works  | 
 
 | 
2016-07-06 | 200 | - | 6 | 7.8 | - | HIGH | low | Med | low | 
| 3 | 182718 | 2016-08-18 | 27550 | - | 6 | 7.7 | - | HIGH | HIGH | HIGH | HIGH | |
| 3 | 182718 | 2016-08-29 | 200 | - | 16 | 8.5 | - | HIGH | low | Med | low | |
| 4 | 188130 [2-month plot]
 Goedgenoeg 433 IP at Orkney Road Bridge on Jagspruit on R502  | 
 
 | 
2016-07-06 | 9090 | - | 4 | 7.3 | - | HIGH | Med | HIGH | HIGH | 
| 4 | 188130 | 2016-08-18 | 241960 | - | 12 | 7.5 | - | HIGH | HIGH | HIGH | HIGH | |
| 4 | 188130 | 2016-08-29 | 249 | - | 10 | 7.6 | - | HIGH | low | Med | low | |
| 5 | 188131 [2-month plot]
 Koekemoerspruit at Buffelsfontein Bridge  | 
 
 | 
2016-07-06 | 22 | - | 12 | 7.4 | - | HIGH | low | low | low | 
| 5 | 188131 | 2016-08-18 | 110 | - | 3 | 7.7 | - | HIGH | low | low | low | |
| 5 | 188131 | 2016-08-29 | 200 | - | 3 | 7.7 | - | HIGH | low | Med | low | |
| 6 | 188132 [2-month plot]
 Orkney - at R30 Bothaville Orkney Bridge on Vaalrivier  | 
 
 | 
2016-07-06 | 57 | - | 12 | 8.9 | - | HIGH | low | low | low | 
| 6 | 188132 | 2016-08-18 | 1733 | - | 10 | 9.0 | - | HIGH | low | HIGH | Med | |
| 6 | 188132 | 2016-08-29 | 4 | - | 11 | 8.8 | - | Med | low | low | low | |
| 7 | 191050 [2-month plot]
 Floorsdrift 15 - Hoopstad at R59 Road Bridge on Vetrivier  | 
 
 | 
2016-07-28 | 4106 | - | 928 | 7.7 | - | HIGH | Med | HIGH | HIGH | 
| 7 | 191050 | 2016-08-24 | 117 | - | 28 | 8.7 | - | HIGH | low | low | low | |
| 8 | 192624 [2-month plot]
 Buffelsfontein 443 IP - at Midvaal Intake  | 
 
 | 
2016-07-06 | 2 | - | 10 | 8.9 | - | Med | low | low | low | 
| 8 | 192624 | 2016-08-18 | 1 | - | 7 | 8.9 | - | Med | low | low | low | |
| 8 | 192624 | 2016-08-29 | 1 | - | 8 | 9.1 | - | Med | low | low | low | |
| 9 | 194791 [2-month plot]
 Klerksdorp Elandsheuval 402 IP - near Johan Nesser Dam Wall  | 
 
 | 
2016-08-23 | 86 | - | 285 | 7.8 | - | HIGH | low | low | low | 
| 10 | 194792 [2-month plot]
 Bothaville - at R59 Road Bridge Over Vals Rivier  | 
 
 | 
2016-07-26 | 95 | - | 9 | 7.5 | - | HIGH | low | low | low | 
| 10 | 194792 | 2016-08-23 | 2 | - | 4 | 7.8 | - | Med | low | low | low | |
| 11 | 194793 [2-month plot]
 Makwassie - at R502 Road Bridge Over Makwassie Spruit  | 
 
 | 
2016-07-26 | 241960 | - | 44 | 7.6 | - | HIGH | HIGH | HIGH | HIGH | 
| 11 | 194793 | 2016-08-24 | 71 | - | 5 | 7.9 | - | HIGH | low | low | low | |
| 12 | 194794 [2-month plot]
 Rietfontein 299 - at R501 Road Bridge Over Renoster River  | 
 
 | 
2016-08-25 | 93 | - | 13 | 8.2 | - | HIGH | low | low | low | 
| 13 | 194795 [2-month plot]
 Corannakraal 87 - at Road Bridge Over Vet Rivier D/S of Erfenis Dam Wall  | 
 
 | 
2016-07-28 | 4839 | - | 359 | 7.6 | - | HIGH | Med | HIGH | HIGH | 
| 13 | 194795 | 2016-08-24 | 6 | - | 213 | 8.2 | - | Med | low | low | low | |
| 14 | 194799 [2-month plot]
 Odendaalsrus - at Water Channel (Drain) in Odendaalsrus  | 
 
 | 
2016-07-27 | 24196 | - | 46 | 7.6 | - | HIGH | HIGH | HIGH | HIGH | 
| 14 | 194799 | 2016-08-25 | 2420 | - | 6 | 8.1 | - | HIGH | Med | HIGH | Med | |
| 15 | 194804 [2-month plot]
 Zandrivierspoort 213 - at Road Bridge Over Sand River  | 
 
 | 
2016-07-28 | 2420 | - | 160 | 7.4 | - | HIGH | Med | HIGH | Med | 
| 15 | 194804 | 2016-08-24 | 582 | - | 86 | 7.6 | - | HIGH | low | HIGH | low | |
| 16 | 194805 [2-month plot]
 Proklameersdrift - at Road Bridge on Vals Rivier  | 
 
 | 
2016-07-26 | 30 | - | 8 | 7.8 | - | HIGH | low | low | low | 
| 16 | 194805 | 2016-08-23 | 20 | - | 16 | 8.3 | - | HIGH | low | low | low | |
| 17 | 194855 [2-month plot]
 Erfenis 71 - near Erfenis Dam D/S of Dam Wall on Vetrivier  | 
 
 | 
2016-08-24 | 77 | - | 222 | 8.2 | - | HIGH | low | low | low | 
| 18 | 195409 [2-month plot]
 Klerksdorp - at Klerksdorp Correctional Service on Skoonspruit  | 
 
 | 
2016-07-26 | 4839 | - | 68 | 7.3 | - | HIGH | Med | HIGH | HIGH | 
| 18 | 195409 | 2016-08-23 | 24196 | - | 72 | 7.4 | - | HIGH | HIGH | HIGH | HIGH | |
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