Florida lake · state assessment record
Lake Seminole (682 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.
- 682
- Assessed acres
- Lake, Freshwater
- Water type
This waterbody in one line
Lake Seminole, 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 10% by assessed acreage nationally (38,628 lakes); 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 fully supporting.
- Not Supporting
- overall status
- P92
- 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 Seminole 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: cause-list length
The standout filed fact is cause-list length: 4 listed impairment causes, a longer list than 95% of assessed lake-type units (n=23,610). List length tracks how states sample and code, not a severity score.
The uses disagree
This record splits: Not Supporting on recreation, aquatic life, Fully Supporting on fish consumption. The divergence is inside the designated-use matrix, not a single all-or-nothing label.
Large assessed unit
At 681.8 acres, Lake Seminole clears the upper tercile of assessed lake-type units with an area on file (2,987 still larger). Size comparisons use the portal's deduplicated lake ranking population, not raw ATTAINS row counts.
Lake Seminole: Category 4B reading
Category 4B says other pollution-control requirements are expected to resolve the impairment on Lake Seminole without a TMDL. The decisive documents are those control requirements, not a load allocation.
Overall status: not supporting
The filer's overall status for Lake Seminole 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 Seminole 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 | Fully Supporting |
| Fish and Wildlife Propagation - Freshwater | Aquatic-life or related | Not 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 |
|---|---|---|---|
| pH | Fish and Wildlife Propagation - Freshwater | 2018 | 4B Restoration Approach |
| Chlorophyll-a | Fish and Wildlife Propagation - Freshwater; Recreation | 2020 | 4B Restoration Approach |
| Nitrogen, Total | Fish and Wildlife Propagation - Freshwater; Recreation | 2020 | 4B Restoration Approach |
| Phosphorus, Total | Fish and Wildlife Propagation - Freshwater; Recreation | 2020 | 4B Restoration Approach |
Reading the record
Lake Seminole: Category 4B reading
4B Category 4B: impaired, other controls in place (not a TMDL path)
Florida filed this assessment unit as Category 4B: impaired, with other controls in place rather than a pollutant-budget TMDL under 303(d).
Scale and rank
Lake Seminole 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 682 assessed acres it ranks 2,988th 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 2,987 lakes with a larger one.
Why no water-level record
Lake Seminole has no daily USGS water-level or reservoir-storage series on this page because a site carries the lake’s name, but that name fits more than one assessed waterbody in the state, and PlainLakes declines it rather than guessing. How PlainLakes links gauges.
In context
Where Lake Seminole 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
682 Top 8% larger than 92% 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 Seminole. 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 Seminole ranks 55th by listed-cause count (4 listed causes) and 139th by assessed size among the 973 with an area filed; it sits in the not-supporting set (636 statewide) . Its listed causes include Chlorophyll-a; Nitrogen, Total; and Phosphorus, Total, which also appear among Florida's most-filed impairment causes (led by Phosphorus, Total). It also lists pH, 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 Seminole's size or cause load
Similar assessed acres
Nearest filed extents (682 acres here).
- Robe Lake · 682 acres · AK
- Rolling Stone Lake · 682 acres · WI
- Pickerel · 682 acres · MN
- Ann · 682 acres · MN
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
- Assessment verdicts are cycle-based, not real-time. For fish-consumption decisions, your state advisory program is the binding source. 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 FL1618. 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.