The global challenge of landscape changes and eutrophication has led to the degradation of freshwater lakes and rivers. The European Union responded to this challenge by developing the Water Framework Directive (WFD), an integrative assessment to evaluate the ecological state of surface waters. The methods outlined in the WFD are used for assessing waterbodies but are also effective in monitoring changes in lake status over time, such as after restoration projects are implemented. Lake Durowskie in Poland has been undergoing restoration efforts since 2009, consisting of hypolimnetic aeration, chemical phosphorus precipitation, and biomanipulation. In this study, the benthic macroinvertebrate community was analyzed from 2010 to 2024 to evaluate changes over time. The Lake Macroinvertebrate Index (LMI) was used to determine the ecological state of the lake and compared to other biological and physio-chemical indexes during the lake restoration. Trend analysis revealed significant increases in the LMI and the Macrophyte Index, indicating an improvement in these communities but requiring additional progress to reach the goal of good ecological state. Conversely, the Diatom Index trended toward a more eutrophic lake state, and the other indexes displayed no significant trend. This variability in conclusions emphasizes the importance of using multiple parameters for the most comprehensive understanding of the lake, especially since some indexes produce short-term snapshots of ecological status while others require longer timeframes to adjust to changing conditions.