Is Lake Jackson Polluted?
Yes — Lake Jackson in Osceola County, Florida is on the EPA's Clean Water Act 303(d) impaired-waters list (2022 assessment cycle). It is cited for Algal growth, Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen). A formal cleanup plan — a Total Maximum Daily Load (TMDL) — has been written. "Impaired" is a legal designation, separate from the lake's EPA condition class water-quality readings: it means at least one designated use (such as swimming, aquatic life, or fish consumption) does not meet state standards for the listed pollutant.
EPA 303(d) Listing
| On 303(d) impaired list | Listed impaired |
| Cleanup plan (TMDL) | Completed |
| Assessment cycle | 2022 |
| EPA IR category | 4A |
| Uses not supported | Aquatic life, Recreation |
| EPA names this lake in the listing | Yes |
| Location | Osceola County, Florida |
Pollutants Cited
- Algal growth — listed by EPA as exceeding water-quality standards for at least one designated use.
- Impaired biota (cause unknown) — listed by EPA as exceeding water-quality standards for at least one designated use.
- Nutrients (phosphorus, nitrogen) — Excess phosphorus and nitrogen fuel algae growth and summer blooms. This is the classic agricultural-runoff and shoreline-development impairment, and the one most likely to affect swimming via blue-green algae.
Specific parameters in the EPA record: Benthic Macroinvertebrates Bioassessments, Chlorophyll-a, Nitrogen, Total, Phosphorus, Total.
What this means for using Lake Jackson
Because Lake Jackson is listed for Nutrients (phosphorus, nitrogen), swimming can be affected — check for posted beach advisories, especially after heavy rain or during visible algae. An impairment listing does not mean the lake is closed — most impaired lakes remain open for boating and swimming. It means a specific pollutant exceeds a standard for a specific use. See the full breakdown on the lake report. The official EPA assessment is available in the ATTAINS waterbody report.
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