Bay-Lullwater Lake
Bay County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Bay-Lullwater Lake. Here is what has been measured.
- Eutrophic
Bay-Lullwater Lake in Bay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 29 µg/L.
Bay-Lullwater Lake is a productive, nutrient-rich eutrophic lake in Bay County, Florida. Overall water quality is declining over recent sampling years. Compared to the 4 other monitored lakes in Bay County, Bay-Lullwater Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-06-30. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
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 Bay-Lullwater 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 Bay-Lullwater Lake
These are the measurements Florida DEP publishes for Bay-Lullwater Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5 ft. Phosphorus 29 µg/L. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 29µg/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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Bay-Lullwater Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Bay-Lullwater Lake typically sits around 73°F at the surface in October. Summer average is about 85°F. Usually warmest in Jun (about 85°F) and coldest in Jan (about 56°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (56°F) to its warmest (85°F).
Typical surface water temperature by month, from 106 field readings (2020–2025) via the EPA Water Quality Portal. See the full Bay-Lullwater Lake water temperature breakdown →
Stays via Stay22
Stays near Bay-Lullwater Lake
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Top-rated places to stay near Bay-Lullwater Lake
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Fishing Bay-Lullwater Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Worsening+1.85 µg/L/yr5 years
Nearby Lakes in Bay County
Frequently asked questions about Bay-Lullwater Lake
Where is Bay-Lullwater Lake?
- Bay-Lullwater Lake is a lake in Bay County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Bay-Lullwater Lake?
- Bay-Lullwater Lake in Bay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 29 µg/L.
Is Bay-Lullwater Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Bay-Lullwater Lake?
- Bay-Lullwater Lake typically sits around 73°F at the surface in October, from 106 EPA Water Quality Portal field readings (2020–2025). That is a typical value for the month, not a live reading.
Explore Bay-Lullwater Lake across LakeQuality
More lakes in Florida
Other Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
437 measurements from 6 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX282 samples · 2020–2024 - Submitting organization not recorded for these samples155 samples · 2020–2025
Some records reached the portal without a submitting organization. Those samples are counted above but not attributed.
Monitoring station identifiers (6)
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.