Florida Lake Water Quality
Water quality grades for 2,195 monitored lakes across 0 counties.
2,195 {{stateName}} lakes carry a grade. Most of the input data flows through monitoring run by {{agency}}, which feeds state, federal, and volunteer measurements into the EPA Water Quality Portal. Only about 9% of {{stateName}}'s lakes pull an A grade — the smaller, agricultural-watershed lakes that dominate the dataset tend to carry persistent nutrient loads. 38% of lakes fall in the D or F brackets.
The state's lakes lean eutrophic: enough nutrient input to support an active algal community, with the trade-offs in clarity and dissolved oxygen that come with it. a leading county ranks highest on average county grade (—). a struggling county sits lowest. With only 0 counties in the state, the cross-county spread is narrower than the within-county spread for most lakes.
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Counties
All 0 Florida counties, ranked by average lake water quality. Compare them against every county nationwide in the county rankings, browse the full directory of graded lakes, or pick a different state.
Top 25 Cleanest Lakes
| Rank | Lake | County | Grade | Clarity |
|---|---|---|---|---|
| 1 | Highlands-Sirena Lake | Highlands | A | 16 ft |
| 2 | Highlands-Verona Lake | Highlands | A | 13.2 ft |
| 3 | Volusia-Winnemissett Lake | Volusia | A | 14 ft |
| 4 | Bay-St. Andrew Bay Lake | Bay | A | 14 ft |
| 5 | Putnam-Barco Lake | Putnam | A | 17 ft |
| 6 | Highlands-Denton Lake | Highlands | A | 23.4 ft |
| 7 | Orange-Down Lake | Orange | A | 14.5 ft |
| 8 | Lake-Sellers | Lake | A | 13.3 ft |
| 9 | Orange-Conway North Lake | Orange | A | 13.2 ft |
| 10 | Orange-Little Conway Lake | Orange | A | 15 ft |
| 11 | Down Lake | Orange | A | 16.1 ft |
| 12 | Clay-Sheelar Lake | Clay | A | 20.8 ft |
| 13 | Lowflynpln Lake | Wakulla | A | - |
| 14 | Wauseon Bay Lake | Orange | A | 14.8 ft |
| 15 | Highlands-Tulane Lake | Highlands | A | 17 ft |
| 16 | Jackson-Silver Lake | Jackson | A | 25 ft |
| 17 | Highlands-Lillian Lake | Highlands | A | 13.5 ft |
| 18 | Miami-Dade-E Lake | Miami-Dade | A | 15 ft |
| 19 | Mlc Lake | Washington | A | 14.1 ft |
| 20 | Orange-Conway South Lake | Orange | A | 14.5 ft |
| 21 | Gap Lake | Washington | A | 13.8 ft |
| 22 | Sheel Lake | Clay | A | 17.2 ft |
| 23 | Dunl Lake | Washington | A | 14.8 ft |
| 24 | Clc Lake | Washington | A | 16.4 ft |
| 25 | Lake Denton | Highlands | A | 19.7 ft |
25 Lakes Needing Attention
| Rank | Lake | County | Grade | Clarity |
|---|---|---|---|---|
| 1 | Crescent Lake South of Bear Island | Putnam | F | - |
| 2 | Georgebr Lake | Lake | F | - |
| 3 | Akron Lake | Lake | F | - |
| 4 | Llnellienwsh Lake | Lake | F | - |
| 5 | Lake Diane Outfall | Pinellas | F | - |
| 6 | South Channel From Lake Suemar | Pinellas | F | - |
| 7 | Orange Lake-Acepd Algae Bloom | Alachua | F | - |
| 8 | Hurricane Creek Downstream From the Nursery Lake | Gadsden | F | - |
| 9 | Depot Pond-Gainesville | Alachua | F | - |
| 10 | Lake Clarke | Palm Beach | F | - |
| 11 | Lake Panasoffkee East of Center | Sumter | F | - |
| 12 | Beaudette Pond Middle | Hillsborough | F | - |
| 13 | Beaudette Pond West | Hillsborough | F | - |
| 14 | Beaudette Pond Inlet | Hillsborough | F | - |
| 15 | Lake Tallavana | Gadsden | F | - |
| 16 | Beaudette Pond Outlet | Hillsborough | F | - |
| 17 | Lake Hancock Se Corner | Polk | F | - |
| 18 | Aj Henry Lake | Leon | F | - |
| 19 | Lake Kanturk | Leon | F | - |
| 20 | Behind Jacaranda Rest Lake | Lee | F | - |
| 21 | Mud Lake Dock | Hillsborough | F | - |
| 22 | City Hall Lake | Lee | F | - |
| 23 | Rv Park Pond | Lee | F | - |
| 24 | Sanibel Lake Estates Lake | Lee | F | - |
| 25 | Southern Tradewinds Lake | Lee | F | - |
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Source: EPA National Aquatic Resource Surveys, 2026.