2007 National Lake Survey - Wisconsin Results
Wisconsin Summary Results
Apparent color
Apparent color is a measure of naturally-occuring humic acids in lake water. Humic acids leach from vegetation in the watershed giving lake water the appearance of tea. Color is measured with Standard Platinum Units (SPU) and lakes greater than 25 SPU are considered 'colored'. Figure 2 illustrates the distribution of color in Wisconsin's 29 National Lake Survey lakes.
Figure 2: Distribution of Apparent Color in Wisconsin lakes
Other currently available data include:
- Secchi disc transparency
- Apparent color
- Habitat: Disturbance and Woody Debris
- Habitat: Summary Table
Last Revised:
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