Michigan lake lovers would be well served by visiting the United States Geological Survey (USGS) Michigan Water Science Center’s Lake Water Clarity Interactive Map Viewer – a free on‐line resource that allows users to view the water transparency of thousands of inland lakes in Michigan. The site provides statewide data layers with predicted Secchi‐disk transparency and corresponding trophic state index (TSI) values for Michigan inland lakes.

The interactive map viewer is an advanced remote sensing application that utilizes the data collected by MiCorps Cooperative Lakes Monitoring Program volunteer water quality monitors over the years and satellite imagery to support a highly accurate predictive water transparency model. In a state with over 11,000 inland lakes, the application allows users to glean an accurate glimpse of probable lake water clarity for many more lakes than have been directly monitored by CLMP volunteers or lake science practitioners. To view available water transparency predictions for Michigan inland lakes of greater than 20 acres without interference from clouds, cloud shadows, dense vegetation or shoreline, point your web browser to


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