EPA Region 1

Stream Condition (IBI)

•	Poor

•	Good

Relative Extent

Relative Risk to
Macroinvertebrate
Integrity (IBI)

Riparian Disturbance
Salinity
Acidification
Riparian Vegetative Cover
In-stream Fish Habitat
Streambed Sediments
Nitrogen
Phophorous

0 10 20 30 40 50 60 0~

I

4

i

8

% of Stream Length Relative Risk Ratio
in Poor Condition

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