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Detailed Ecological Assessment Report 2008 – Keenjhar Lake
Table 30 – Keenjhar water quality assessment (post-monsoon)
Paramet Permissible
Sample locations
ers (WHO) KL- KL- KL- KL- KL- KL- KL- KL- KL- Remarks
Standard A3 A4 A6 A7 A8 A9 A10 A11 A12
1 TDS
(mg/L)
1000 364.0 374.0 432.0 432.0 377.0 368.0 356.0 338.0 348.0 Normal
2 pH 6.5-8.5 8.00 8.30 8.18 8.18 8.00 8.30 8.30 8.31 8.15 Normal
3 Turbidity 5 NTU 4.73 13.3 83.3 97.2 5.46 3.86 5.12 4.71 3.11 Very high
(NTU)
at KL-A6,
KL-A7
4 DO > 2.0 mg/l (*) 1.3 1.4 1.9 1.2 1.7 2.1 2.4 2.7 1.8 Low
(mg/L)
except KL-
9,10,11
5 Total 500 126 115 127 124 125 112 80 70 60 Normal
Hardness
(mg/L)
±0.32 ±0.35 ±0.33 ±0.25 ±0.20 ±0.35 ±0.22 ±0.15 ±0.15
6 SO4 –
(mg/ L)
250 80
±0.15
135
±0.12
155
±0.15
145
±0.15
115
±0.20
133
±0.25
170
±0.25
155
±0.32
165
±0.33
Normal
7 Cl –
(mg/ L)
250 100
±0.25
80
±0.22
105
±0.23
106
±0.25
80
±0.30
78
±0.30
60
±0.15
50
±0.15
70
±0.15
Normal
8 Magnesiu 150 86 75 87 89 80 72 40 40 35 Normal
m
(mg/ L)
±0.15 ±0.20 ±0.15 ±0.30 ±0.30 ±0.35 ±.033 ±0.40 ±0.42
9 Calcium 75 40 40 40 35 45 40 40 30 25 Normal
(mg/ L)
±0.25 ±0.20 ±0.15 ±0.30 ±0.30 ±0.35 ±0.33 ±0.40 ±0.42
10 COD
7.58 -- 5.56 5.05 12.13 -- -- -- -- Relatively
(mg/L)
high at
11 BOD
1.52 -- 1.52 1.00 6.07 -- -- -- --
KL-A3 and
A8
Relatively
(mg/L)
high
KL-A8
at
12 Cr (µg/L) 0.05 (mg/L) 6.4 10.5 20.8 10.2 8.00 14.3 18.8 14.0 12.0 Normal
13 Cd (µg/L) 0.003 (mg/L) 0.84 2.38 4.74 3.81 0.74 1.59 0.61 0.63 1.21 High at
KL-A6,A7
14 Pb (µg/L) 0.01 (mg/L) 17.18 20.63 16.65 14.69 10.93 12.44 18.79 18.61 16.13 Not
high
very
15 Ni (mg/L) 0.02 (mg/L) 1.53 0.93 1.73 1.38 0.99 1.07 1.12 0.93 1.40 High
16 Phenol
(µg/L)
0.002 (mg/L) 15.3 8.5 8.5 8.5 6.8 6.8 6.8 3.4 5.1 Very high
(*) Stream water quality standards (Pescode, 1977)
The ± values show the standard deviation
3.8.6 Threats and recommendations
The report did not highlight specific threats and recommendations in the report
though the author did comment that the limited monitoring does not give a clear
picture, It is therefore necessary that the continuous year round water quality
monitoring program may be initiated to record the changes in water quality,
preferably full range stream water quality parameters including biological ones.
Any study which helps determine the assimilative capacity of river/
stream/reservoir will be a yard mark and corner stone in developing the criteria of
total maximum daily loads (TMDLs) for public safety and other beneficial use of
water. One recommendation was that the population growth (particularly in
Ameer Pir) and human activities in point source location/villages need to be
checked to control the pollution. For this public awareness program and training
of NGOs/communities is vital to address & arrest the environmental degradation,
especially in the picnic/tourist location area.
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