Beulah Lake
Polk County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Beulah Lake. Here is what has been measured.
- Eutrophic
- Limited data
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.
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. Methodology: how these readings are compared.
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. 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.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 32µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 60 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Beulah Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Stable-0.97 µg/L/yr6 years
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. Check local advisories before you swim.
Explore Beulah Lake across LakeQuality
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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.