№
Water body
Monitoring point
IWP
Degree of water quality
1
The Chirchik River
Above the Gazalkent city
1,05
III
– Moderately polluted
2
The Chirchik River
Below the Tashkent city
1,18
III
– Moderately polluted
3
Karasu Canal
Below the Tashkent city
0,93
II
– Clean
4
Bozsu Canal
Below the Tashkent city
1,30
III
– Moderately polluted
5
Akhangaran River
Above the Angren city
1,46
III
– Moderately polluted
6
Syr Darya River
Below the Namangan city
1,36
III
– Moderately polluted
7
Salor Canal
Above the Tashkent city
0,86
II
– Clean
8
Syr Darya River
Below the Bekabad city
2,08
III
– Moderately polluted
9
Bozsu Canal
Above the Tashkent city
0,56
II
– Clean
10
Amu Darya River
Termez city
1,42
III
– Moderately polluted
11
Surkhandarya River
Termez city
0,88
II
– Clean
Criteria of water pollution based on the Index of Water Pollution and criteria for improvement (deterioration) of water quality
Degree of water quality
Textual description
Level of the IWP
Information on the possible use of water
I
Very clean
less than 0.3
II
Clean
from 0.3 to 1.0
III
Moderately polluted
from 0.3 to 1.0
IV
Polluted
from 2.5 to 4.0
V
Dirty
from 4.0 to 6.0
VI
Very dirty
from 6.0 to 10.0
VII
Extremely dirty
from 10.0 and high