Worldwide standard

parameters

Sedibeng district WWTPs averages

Potable water reuse

Industrial reuse

WWTP1

WWTP2

WWTP3

WWTP4

SANS 241: 2015^$

Beaufort west 2⁰ effluent⁺

Namibia final⁺⁺

DWAF general limit^#

^*Eskom

cooling

Bluescope 2⁰ effluent^***

COD (mg/ℓ)

19.7

21.3

26.9

130.8

-

47

15

75

75

-

TSS (mg/ℓ)

0.6

29.7

3.0

28.2

-

20

25

-

1

(mg/ℓ)

0.5

1.0

3.2

25

1.5

4.9

0.1

3

15

1

(mg/ℓ)

3.7

4.6

3.5

2.6

11

16

10

15

15

4

(mg/ℓ)

0.3

1.0

0.9

4.1

-

5.1

10

-

1

(mg/ℓ)

37.9

-

55.6

33.3

500

-

200

-

100

1

Cl⁻ (mg/ℓ)

30.2

-

75

65.2

300

-

250

-

180

20

pH

7.07

7.06

7.11

7.6

5 - 9.7

7.5

-

5.5-9.5

9

7.5

Conductivity (mS/m)

40.8

63

60.4

92.8

170

122

-

150

400

-

Alkalinity (mg/ℓ as CaCO₃)

182

241.6

293

419.3

-

-

-

-

150

-

Faecal coliforms (CFU/100 mℓ)

4776

15979

1443

0

-

0

1000

10⁶

1

E. coli (MPN/100 mℓ)

5259

12783

1589

1.5 x 10⁶

0

-

0

-

-

-