Point scale

10

8

6

4

2

 Total Taxa

> 18

18 - 15

14 - 11

10 - 7

< 7

 EPT Taxa

> 10

10 - 8

7 - 5

4 - 2

< 2

 Biotic Index

< 3.5

3.5 - 4.5

4.6 - 5.4

5.5 - 6.5

> 6.5

 

Integrity Rating

Optimal

Suboptimal

Marginal

Poor

> 24

24 - 19

18 - 13

< 13