




		Dissolved Oxygen : Interpreting Test Results

A Guide for Interpreting Dissolved Oxygen Concentrations

Dissolved Oxygen Concentrations	mg/L	River Water Quality	River Ecosystem
High	7 - 11	Excellent	Healthy
Medium	4 - 7	Good	Borderline Healthy
Low	2 - 4	Poor	Unhealthy
Very Low	0 - 2	Very Poor	Won't support life

Adapted from "RiverWatch Network Water Sampling and Analysis Manual"