Finnish lakes are recovering from acidification due to reduced emissions of sulfur. Data from 1990 to 1999 shows decreasing sulfate and acidity levels in lakes across Finland. Base cation concentrations also decreased, especially in southern Finland. About 27% of small lakes have shown significant increases in alkalinity, indicating recovery. However, further reductions in sulfur deposition are not expected to occur by 2010, potentially slowing down the recovery process in the future.