Florida lake · state assessment record
Lake Okeechobee (54,715 acres)
Assessment decisions reported by Florida to EPA under Clean Water Act sections 303(d) and 305(b), last assessed in the 2024 reporting cycle. One of the 2 cleanup plans below was established by EPA rather than by Florida.
- 54,715
- Assessed acres
- Lake, Freshwater
- Water type
This waterbody in one line
Lake Okeechobee, a lake in Florida, is assessed as not supporting one or more designated uses, with 4 listed impairment causes in the state's most recent Integrated Report cycle (2024). By assessed acreage it sits among the largest 1% of assessed lakes nationally (38,628 lakes with a filed area); its impairment list is among the longest nationally (4 listed causes vs 23,610 assessed lakes). Aquatic life is assessed as not supporting. Fish consumption is assessed as not supporting.
- Not Supporting
- overall status
- P100
- Assessed size nationally
- P3
- Shorter cause list
- Not Supporting
- aquatic life
Assessment verdicts are the state agency's decisions as reported to EPA ATTAINS; PlainLakes renders them without modification.
A composite of this record's EPA ATTAINS designated-use verdicts, filed impairment count, and assessment currency, weighted and benchmarked against the national corpus of assessed active waterbodies. This is a water-quality standing, not a human-recreation or property-value judgment, and dimensions with no filed verdict drop out rather than count against the score.
Where Lake Okeechobee stands in the filed register
Paragraphs are selected by this unit's percentiles and use matrix: different lakes lead with different dimensions. Figures are ATTAINS / portal register arithmetic, not advice.
The signature stat: assessed size
The number that most separates Lake Okeechobee nationally is assessed size: 54,715 acres, larger than 100% of the 38,628 lake-type units with an area on file.
Longer than most cause lists
4 listed causes puts this unit above 95% of assessed lake-type records by list length. Treat that as a coding-and-sampling signal: states that split pollutants finely mint longer lists without proving worse water.
Every ruled-on use is not supporting
On the uses this filer ruled on, fish consumption, recreation, aquatic life, every determination is Not Supporting. That is a use-by-use reading of the filed record, not a single overall lake grade.
Lake Okeechobee: Category 5, TMDL still owed
Category 5 is the Integrated Report band where a TMDL (or equivalent) is still expected for Lake Okeechobee. Read the listed causes and any cleanup actions filed beside them before treating the overall status tile as a finished restoration story.
Overall status: not supporting
The filer's overall status for Lake Okeechobee is Not Supporting. That tile summarizes the assessment unit; the designated-use rows and cause list are the evidence behind it.
According to the U.S. Environmental Protection Agency's ATTAINS program, Florida carries 1,475 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Lake Okeechobee without modification. See our methodology for reporting-unit limits and gauge linking rules.
The record
Designated-use assessments
Fully Supporting and Not Supporting are the state's definitive verdicts; other entries mean the use was not conclusively assessed in this cycle.
| Designated use | Group | Verdict |
|---|---|---|
| Fish Consumption | Fish-consumption or fishery | Not Supporting |
| Fish and Wildlife Propagation - Freshwater | Aquatic-life or related | Not Supporting |
| Potable Water Supplies | Drinking-water supply designation | Fully Supporting |
| Recreation | Recreation | Not Supporting |
The record
Listed impairment causes
Causes the state listed as impairing designated uses of this lake, with the cycle each was first listed and the Clean Water Act action recorded against it.
| Cause | Affected uses | First listed | Cleanup standing |
|---|---|---|---|
| Iron | Fish and Wildlife Propagation - Freshwater | 2018 | TMDL priority: High |
| Mercury in Fish Tissue | Fish Consumption | 2018 | TMDL established by EPA |
| Phosphorus, Total | Fish and Wildlife Propagation - Freshwater; Recreation | 2020 | TMDL approved |
| Turbidity | Fish and Wildlife Propagation - Freshwater; Recreation | 2024 | TMDL priority: High |
Reading the record
EPA plan standing on Lake Okeechobee
1 cleanup plan EPA established here
EPA, not Florida, established 1 of the 2 plans.
Scale and rank
Lake Okeechobee is one of 1,475 lake-type waterbodies reported to EPA from Florida, and one of 973 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 54,715 assessed acres it ranks 56th by assessed size among the 38,628 lakes the dataset carries an area for, counting a state’s repeated filings of one water once, behind 55 lakes with a larger one.
Why no water-level record
Lake Okeechobee has no daily USGS water-level or reservoir-storage series on this page because NWIS lists a lake monitoring site named for the waterbody, but the site is not active, and PlainLakes ingests only the active inventory, so there is no series to attach. How PlainLakes links gauges.
In context
Where Lake Okeechobee sits nationally
Assessed size among U.S. lakes
Distribution of assessed acreage across ATTAINS lakes filed with an area, counting a state’s repeated filings of one water once
54,715 Top 1% larger than 99%+ of 38,628 lakes
lakes the dataset carries an area for, counting a state’s repeated filings of one water once, bucketed by value
Source EPA ATTAINS · Reporting cycles 1987–2026
Listed causes vs waterbodies carrying a verdict
How many impairment causes U.S. waterbodies with a reported verdict carry
4 Longer than most more listed causes than 95% of 23,610 waterbodies carrying a verdict
named waterbodies carrying a verdict, bucketed by value
Source EPA ATTAINS · Reporting cycles 1987–2026
In both charts each bar is a band and taller bars hold more waterbodies; the dashed line and filled bar mark Lake Okeechobee. Hover or tap any bar for its full count and share.
In context
Florida context
ATTAINS carries 1,475 lake-type waterbodies in Florida, 636 assessed as not supporting at least one use and 367 fully supporting. Among the 973 indexed units there, Lake Okeechobee ranks 27th by listed-cause count (4 listed causes) and 4th by assessed size among the 973 with an area filed; it sits in the not-supporting set (636 statewide) . Its listed causes include Mercury in Fish Tissue; and Phosphorus, Total, which also appear among Florida's most-filed impairment causes (led by Phosphorus, Total). It also lists Iron and Turbidity, outside that top-five list.
| Other large assessed lakes in Florida | Assessed acres |
|---|---|
| Lake Okeechobee Not Supporting | 76,101 |
| Lake George Not Supporting | 43,576 |
| Lake Apopka Not Supporting | 30,909 |
| Lake Kissimmee Not Supporting | 30,671 |
| Lake Istokpoga Not Supporting | 26,673 |
| Lake Tohopekaliga Fully Supporting | 19,006 |
Peers near Lake Okeechobee's size or cause load
Similar assessed acres
Nearest filed extents (54,715 acres here).
- Lake Champlain, Main Lake, Middle · 54,972 acres · NY
- Honey Lake · 55,526 acres · CA
- Harry S Truman Reservoir · 55,600 acres · MO
- Columbia River · 55,630 acres · OR
Similar cause load
Nearest listed-cause counts (4 here). Peers already in the acreage column are omitted.
- Agency Lake · 4 causes · OR
- Aldrich Pond · 4 causes · MA
- American Falls Reservoir (Snake River) · 4 causes · ID
- Anderson & Carlton · 4 causes · IL
What to do with this record
- The fish-consumption use is assessed as not supporting. Before eating fish from this lake, check your state fish-advisory program for species-specific meal limits. Consumption status guide
- Impairment listings follow the Clean Water Act 303(d) process; a listing is a regulatory finding, not a closure notice. 303(d) explained
PlainLakes renders state assessment decisions and federal gauge observations without modification. It does not issue advisories.
Assessment decisions on this page are rendered directly from state Integrated Report records in EPA's ATTAINS system; gauge figures are daily-value observations from the USGS National Water Information System, no number is typed in by an editor. Overall status, use verdicts, and causes are the state's reported decisions for assessment unit FL3212G. Counts and percentiles are computed across all lake-type records PlainLakes ingests from ATTAINS. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-17. Primary sources: EPA ATTAINS and USGS National Water Information System.