EPA Region 9

Relative Extent

Relative Risk to
Macroinvertebrate
Integrity (IBI)

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

n r

0

10 15 20 25 30 0

8

% of Stream Length
in Poor Condition

Relative Risk Ratio

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