Sample
Date

Sample
Site
description

Estrone
(ng/L)

%
Removal

17-ß-
Estradiol
 (ng/L)

%
Removal

 

 

 

 

 

 

11/03/2010

Darvill influent

13

 

20

 

 

Darvill effluent

3

77

5

75

 

Msunduzi River u/s of Darvill

2

 

1

 

 

Msunduzi River  d/s of Darvill

2

 

2

 

01/11/2010

Darvill influent

30

 

33

 

 

Darvill effluent

11

63

9

73

 

Msunduzi River u/s of Darvill

7

 

12

 

 

Msunduzi d/s of Darvill

2

 

4

 

01/02/2011

Darvill influent

42

 

57

 

 

Darvill effluent

16

62

18

68

 

Msunduzi River u/s of Darvill

3

 

3

 

 

Msunduzi River d/s of Darvill

5

 

5

 

u/s = control sample taken upstream of the Darvill WWW
d/s = control sample taken downstream of the Darvill WWW
Table 2: Estrogen levels in sewage influent and treated sewage effluent at DWWW
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