Lake Deer
Polk County, FloridaView mapDirections
No nutrient or algae sampling on record from Florida DEP for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- Limited data
Lake Deer in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported.
Lake Deer is a lake in Polk County, Florida. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-05-05. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Lake Deer is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Lake Deer is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Deer
These are the measurements Florida DEP publishes for Lake Deer, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Lake Deer
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Lake Deer
Compare lakeside cabins, hotels, and vacation rentals near Lake Deer in Polk County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Lake Deer
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Worsening+1.09 µg/L/yr6 years
EPA Impairment Status
Lake Deer is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL1521P · Official waterbody report
Nearby Lakes in Polk County
Frequently asked questions about Lake Deer
Where is Lake Deer?
- Lake Deer is a lake in Polk County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Lake Deer?
- Lake Deer in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported.
Is Lake Deer safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Deer is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
8 measurements from 2 monitoring stations, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples4 samples · 2020
- Submitting organization not recorded for these samples4 samples · 2021
Monitoring station identifiers (2)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database