Parameters

Author and Sampling Date

Maximum Permissible Limit in the Effluent

Berehanu and Lemma, 2009

(May, 2008)

Present work

(Dec 10, 2009)

COD

-

100

250

DO mg/l

-

3.64

NS

mg/l

0.08

2.15

20

mg/l

0.34

0.11

5

TN mg/l

-

11

80

mg/l

0.08

245

10

S²⁻ mg/l

-

3.35

2

mg/l

271.7

2000

1000

TDS mg/l

998

530

3000

EC (μS/cm)

1193

1059

NS

Cd mg/l

-

0.00008

1.0

Co mg/l

-

0.0112

1.0

Cr mg/l

-

0.00123

2.0

Fe mg/l

-

1.10

10

Pb mg/l

-

0.042

0.5

Zn mg/l

-

71.4

5

As mg/l

-

0.00148

0.25

Hg mg/l

-

0.00039

0.001