Eastern Rock Lake
Lee County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Eastern Rock Lake. Here is what has been measured.
- Eutrophic
- Limited data
Eastern Rock Lake in Lee County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 47 µg/L.
Eastern Rock Lake is a productive, nutrient-rich eutrophic lake in Lee County, Florida. Overall water quality is improving over recent sampling years. Compared to the 73 other monitored lakes in Lee County, Eastern Rock Lake ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-07-13. 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 Eastern Rock 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 Eastern Rock Lake
These are the measurements Florida DEP publishes for Eastern Rock Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 47 µg/L. TSI 60.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 47µg/L | Fair 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
Ask about Eastern Rock Lake
Answers come straight from the public measurements and survey records on this page.
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Stays near Eastern Rock Lake
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Fishing Eastern Rock Lake
Water quality readings over time
2 seasons of samples on record (2020–2022). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Improving-50.5 µg/L/yr2 years
Nearby Lakes in Lee County
Frequently asked questions about Eastern Rock Lake
Where is Eastern Rock Lake?
- Eastern Rock Lake is a lake in Lee County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Eastern Rock Lake?
- Eastern Rock Lake in Lee County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 47 µg/L.
Is Eastern Rock Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Eastern Rock Lake across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples4 samples · 2020–2022
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.