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Lake St. Marys: Recreation Blooms Amid Water Quality Fight
6 Jun
Summary
- LIA spearheads public-private projects enhancing lake attractions.
- Water quality remains a challenge, with microcystins still present.
- Tourism at Grand Lake St. Marys generates $267.9 million annually.

Grand Lake St. Marys is experiencing a surge in recreational development, with the Lake Improvement Association (LIA) leading numerous public-private endeavors. These efforts have introduced new amenities such as playgrounds and accessible fishing docks, aiming to enhance the visitor experience for the 1,500-member association's region.
Despite these advancements, the lake, situated in Auglaize and Mercer Counties, continues to grapple with water quality issues, specifically the presence of microcystins from blue-green algae blooms. While advisories can fluctuate, the LIA remains cautiously optimistic due to mitigation strategies like agricultural runoff 'treatment trains' and a successful dredging program removing phosphorus-laden sediment.
The economic impact of tourism in the Grand Lake St. Marys region is substantial, estimated at $267.9 million annually. This influx of visitors supports over 3,300 jobs and generates more than $30 million in state and local taxes, underscoring the importance of ongoing improvement efforts.