| № | 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 | 90849 [2-month plot]
 Kroonstad - at R76 Road Bridge on Vals River (Old Barend Wessel)  | 
 
 | 
2015-11-19 | 40 | - | 9 | 8.3 | - | HIGH | low | low | low | 
| 1 | 90849 | 2015-12-18 | 100 | - | 12 | 9.0 | - | HIGH | low | low | low | |
| 2 | 182718 [2-month plot]
 Skoonspruit D/S from Orkney Sewage Works  | 
 
 | 
2015-11-18 | 48 | - | 31 | 7.9 | - | HIGH | low | low | low | 
| 2 | 182718 | 2015-12-03 | 980400 | - | 36 | 7.7 | - | HIGH | HIGH | HIGH | HIGH | |
| 2 | 182718 | 2015-12-14 | 980400 | - | 11 | 7.8 | - | HIGH | HIGH | HIGH | HIGH | |
| 2 | 182718 | 2015-12-29 | 15650 | - | 48 | 7.2 | - | HIGH | Med | HIGH | HIGH | |
| 3 | 188130 [2-month plot]
 Goedgenoeg 433 IP at Orkney Road Bridge on Jagspruit on R502  | 
 
 | 
2015-11-05 | 1200000 | - | 54 | 7.5 | - | HIGH | HIGH | HIGH | HIGH | 
| 3 | 188130 | 2015-11-18 | 1100000 | - | 19 | 7.9 | - | HIGH | HIGH | HIGH | HIGH | |
| 3 | 188130 | 2015-12-03 | 920800 | - | 45 | 7.7 | - | HIGH | HIGH | HIGH | HIGH | |
| 3 | 188130 | 2015-12-14 | 613100 | - | 12 | 7.7 | - | HIGH | HIGH | HIGH | HIGH | |
| 3 | 188130 | 2015-12-29 | 325500 | - | 20 | 7.7 | - | HIGH | HIGH | HIGH | HIGH | |
| 4 | 188131 [2-month plot]
 Koekemoerspruit at Buffelsfontein Bridge  | 
 
 | 
2015-11-05 | 200 | - | 34 | 8.5 | - | HIGH | low | Med | low | 
| 4 | 188131 | 2015-12-03 | 400 | - | 10 | 7.9 | - | HIGH | low | HIGH | low | |
| 4 | 188131 | 2015-12-14 | 15850 | - | 10 | 8.0 | - | HIGH | Med | HIGH | HIGH | |
| 4 | 188131 | 2015-12-29 | 2000 | - | 17 | 8.8 | - | HIGH | Med | HIGH | Med | |
| 5 | 188132 [2-month plot]
 Orkney - at R30 Bothaville Orkney Bridge on Vaalrivier  | 
 
 | 
2015-11-05 | 520 | - | 14 | 8.9 | - | HIGH | low | HIGH | low | 
| 5 | 188132 | 2015-11-18 | 48 | - | 14 | 8.8 | - | HIGH | low | low | low | |
| 5 | 188132 | 2015-12-03 | 20 | - | 17 | 9.0 | - | HIGH | low | low | low | |
| 5 | 188132 | 2015-12-14 | 19 | - | 12 | 8.7 | - | HIGH | low | low | low | |
| 5 | 188132 | 2015-12-29 | 836 | - | 17 | 8.8 | - | HIGH | low | HIGH | low | |
| 6 | 191050 [2-month plot]
 Floorsdrift 15 - Hoopstad at R59 Road Bridge on Vetrivier  | 
 
 | 
2015-11-17 | 2650 | - | 142 | 7.9 | - | HIGH | Med | HIGH | Med | 
| 6 | 191050 | 2015-12-18 | 410 | - | 51 | 8.5 | - | HIGH | low | HIGH | low | |
| 7 | 192624 [2-month plot]
 Buffelsfontein 443 IP - at Midvaal Intake  | 
 
 | 
2015-11-05 | 100 | - | 13 | 8.8 | - | HIGH | low | low | low | 
| 7 | 192624 | 2015-11-18 | 980400 | - | 13 | 8.8 | - | HIGH | HIGH | HIGH | HIGH | |
| 7 | 192624 | 2015-12-03 | 23 | - | 17 | 9.0 | - | HIGH | low | low | low | |
| 7 | 192624 | 2015-12-14 | 17 | - | 12 | 8.7 | - | HIGH | low | low | low | |
| 7 | 192624 | 2015-12-29 | 41 | - | 15 | 8.8 | - | HIGH | low | low | low | |
| 8 | 194791 [2-month plot]
 Klerksdorp Elandsheuval 402 IP - near Johan Nesser Dam Wall  | 
 
 | 
2015-11-16 | 38 | - | 164 | 8.8 | - | HIGH | low | low | low | 
| 8 | 194791 | 2015-12-04 | 4100 | - | 309 | 8.6 | - | HIGH | Med | HIGH | HIGH | |
| 8 | 194791 | 2015-12-15 | 1733 | - | 327 | 8.9 | - | HIGH | low | HIGH | Med | |
| 9 | 194792 [2-month plot]
 Bothaville - at R59 Road Bridge Over Vals Rivier  | 
 
 | 
2015-11-16 | 36 | - | 11 | 7.9 | - | HIGH | low | low | low | 
| 9 | 194792 | 2015-12-04 | 410 | - | 14 | 8.1 | - | HIGH | low | HIGH | low | |
| 9 | 194792 | 2015-12-15 | 200 | - | 15 | 8.8 | - | HIGH | low | Med | low | |
| 10 | 194793 [2-month plot]
 Makwassie - at R502 Road Bridge Over Makwassie Spruit  | 
 
 | 
2015-11-16 | 1000 | - | 751 | 7.5 | - | HIGH | low | HIGH | Med | 
| 10 | 194793 | 2015-12-04 | 3690 | - | 30 | 7.8 | - | HIGH | Med | HIGH | Med | |
| 10 | 194793 | 2015-12-15 | 6630 | - | 37 | 7.8 | - | HIGH | Med | HIGH | HIGH | |
| 11 | 194794 [2-month plot]
 Rietfontein 299 - at R501 Road Bridge Over Renoster River  | 
 
 | 
2015-11-19 | 49 | - | 24 | 8.6 | - | HIGH | low | low | low | 
| 11 | 194794 | 2015-12-18 | 100 | - | 12 | 9.0 | - | HIGH | low | low | low | |
| 12 | 194795 [2-month plot]
 Corannakraal 87 - at Road Bridge Over Vet Rivier D/S of Erfenis Dam Wall  | 
 
 | 
2015-11-19 | 649 | - | 118 | 8.2 | - | HIGH | low | HIGH | low | 
| 12 | 194795 | 2015-12-18 | 200 | - | 114 | 8.7 | - | HIGH | low | Med | low | |
| 13 | 194801 [2-month plot]
 Welkom Thabong Township - at Water Channel in Thabong Township  | 
 
 | 
2015-11-19 | 1 | - | 20 | 4.8 | - | Med | low | low | low | 
| 13 | 194801 | 2015-12-18 | 2420 | - | 3 | 7.5 | - | HIGH | Med | HIGH | Med | |
| 14 | 194805 [2-month plot]
 Proklameersdrift - at Road Bridge on Vals Rivier  | 
 
 | 
2015-11-19 | 2420 | - | 10 | 8.7 | - | HIGH | Med | HIGH | Med | 
| 14 | 194805 | 2015-12-18 | 100 | - | 11 | 8.8 | - | HIGH | low | low | low | |
| 15 | 194855 [2-month plot]
 Erfenis 71 - near Erfenis Dam D/S of Dam Wall on Vetrivier  | 
 
 | 
2015-11-19 | 770 | - | 113 | 8.3 | - | HIGH | low | HIGH | low | 
| 15 | 194855 | 2015-12-18 | 54750 | - | 117 | 8.6 | - | HIGH | HIGH | HIGH | HIGH | |
| 15 | 194855 | 2015-12-30 | 520 | - | 117 | 8.6 | - | HIGH | low | HIGH | low | |
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