A 15-year estimated Trophic State Index (eTSI) for Michigan inland lakes is available, and it spans seven datasets, each representing 1 to 3 years of data from 1999 to 2013. On average, 3,000 inland lake eTSI values are represented in each of the datas
Fuller, Lori M. lmfuller@usgs.gov,Jodoin, Richard S. rsjodoin@usgs.gov. Estimation of a Trophic State Index for selected inland lakes in Michigan, 1999???2013. 2016-01-01.