09/18/2025
https://www.clickorlando.com/news/local/2025/08/28/is-americas-dirtiest-lake-in-florida-thats-what-this-new-study-says/
I beg your pardon. Newnan's Lake in Alachua County is more impaired than Lake Okeechobee. Direct Comparison (Water Quality Only)
Nutrients: Newnan's Lake has much higher concentrations of nitrogen and phosphorus.
Trophic State: Both are eutrophic, but Newnan's is more consistently hypereutrophic.
Algal Blooms: Both suffer blooms, but Newnan’s poor water clarity and nutrient ratios make its water quality “worse” at the local level.
Okeechobee’s issue is that even “moderate” nutrient concentrations become catastrophic because of its size and the amount of water involved.
If you are asking strictly about water quality impairment (nutrient concentrations, eutrophication, algal growth, clarity), Newnans Lake is more impaired than Lake Okeechobee.
The study looks at federal chemical data for many of the nation's largest lakes in the U.S. to determine pollutant levels.