Category' |
Organie Pollution |
Saprobity |
SI |
i |
No polution |
Oligosaprobic |
1,0 to <1,5 |
i-ii |
Few polution |
Oligo to beta-mesosaprobic |
1,5 to <1,8 |
li |
Moderate polution |
Beta mesosprobic |
1,8 to <2,3 ■ |
ii-iii |
Critical polution |
Beta to Alpha-mesosaprobic |
2,3 to <2,7 |
iii • |
High Polution |
Alpha- mesosaprobic |
2,7 to 3,2 |
lll-IV |
Very high polution |
Alpha- mesosaprobic to polysaprobic |
3,2 to < 3,5 |
IV |
Extremly high p |
Polysaprobic |
3,5 to 4,0 Limnolc ji |