Parameter

1st sampling* (mg∙l−1)

2nd sampling* (mg∙l−1)

Chloride

420 ± 26

486 ± 32

Colour

253 ± 19

238 ± 19

BOD5

694 ± 28

576 ± 75

COD

1235 ± 34

1204 ± 13

N total

0.76 ± 0.04

0.66 ± 0.06

P total

1.36 ± 0.01

1.37 ± 0.03

pH

7.4

7.2