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Detroit River-Western Lake Erie Basin Indicator Project
INDICATOR: Dissolved Oxygen Levels in the Rouge River
Figure 1. The percentage of dissolved oxygen measurements in Main 3 and 4 subwatersheds of the Rouge River that exceed the Michigan standard of 5 mg/L for protection of a warm water fishery, 1973-2005. A higher percentage means that these subwatersheds more frequently exceed the Michigan dissolved oxygen standard and that dissolved oxygen conditions are improving.
| Year | Percentage of dissolved oxygen in Main 3 & 4 subwatersheds of the Rouge River exceeding 5 mg/L |
|---|---|
1973 |
20% |
1978/1979 |
75% |
1980/1981 |
28% |
1986 |
68% |
1987/1988 |
80% |
1994 |
63% |
1995 |
77% |
1996 |
64% |
1997 |
60% |
1998 |
60% |
1999 |
77% |
2000 |
96% |
2001 |
85% |
2002 |
81% |
2003 |
86% |
2004 |
99% |
2005 |
83% |
