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LakeQuality

Most well-managed working lakes register as mesotrophic — the band that balances productivity with clarity. 8 lakes in Kansas sit in the mesotrophic band. About 0% are deep (50+ ft); the rest are shallower basins where watershed management keeps nutrients from pushing the system into eutrophy.

Mesotrophic lakes sit in the middle of the phosphorus and chlorophyll-a range: productive but still clear, with readings that rarely reach the EPA's poorest condition class.

#LakeCountyClarityDepthTSI
1Wilson LakeRussell8.7 ft-45
2Douglas Co State Fishing LakeDouglas9.5 ft-47
3Pottawatomie State Fishing LakePottawatomie7.6 ft-47
4Pottawatomie State Fishing LakePottawatomie8.3 ft-44
5Osage Co State Fishing LakeOsage6.2 ft-49
6Melvern LakeOsage4.8 ft-50
7Cedar Creek ReservoirBourbon8.2 ft-48
8Yates Center ReservoirWoodson1.6 ft-59

Source: EPA National Aquatic Resource Surveys, 2026.