Beulah Lake
Polk County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Beulah Lake. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
- Limited data
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Answers come straight from the public measurements and survey records on this page.
Beulah Lake in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 32 µg/L.
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Beulah Lake is a productive, nutrient-rich eutrophic lake in Polk County, Florida. Overall water quality is declining over recent sampling years. Compared to the 176 other monitored lakes in Polk County, Beulah Lake ranks #78 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-09-20. Grade methodology: LakeQuality methodology.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Beulah Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Beulah Lake 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 Beulah Lake
These are the measurements Florida DEP publishes for Beulah Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.3 ft of visibility. Phosphorus 32 µg/L. TSI 60.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Measured, not scored |
| Phosphorus | 32 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Beulah Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.013 m/yr | 6 |
| Phosphorus | → Stable | -0.97 µg/L/yr | 6 |
EPA Impairment Status
Beulah Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL1543 · Official waterbody report · Matched by proximity (0.85 km)
Nearby Lakes in Polk County
Frequently asked questions about Beulah Lake
Where is Beulah Lake?
- Beulah Lake 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 Beulah Lake?
- Beulah Lake in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 32 µg/L.
Is Beulah Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Beulah Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
40 measurements from 1 monitoring station, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples40 samples · 2020–2023
Monitoring station identifiers (1)
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