Twin Lake Eastern Lake
Okaloosa County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Twin Lake Eastern Lake. Here is what has been measured.
- Eutrophic
- Limited data
Twin Lake Eastern Lake in Okaloosa County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 90 µg/L.
Twin Lake Eastern Lake is a productive, nutrient-rich eutrophic lake in Okaloosa County, Florida. Overall water quality is declining over recent sampling years. Compared to the 14 other monitored lakes in Okaloosa County, Twin Lake Eastern Lake ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-08-27. Methodology: how these readings are compared.
Swimming conditions
Readings onlyBacteria tested: exceedances
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.
Based on E. coli testing, Twin Lake Eastern Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 18.2% of 11 samples across 2 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Whether Twin Lake Eastern 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 Twin Lake Eastern Lake
These are the measurements Florida DEP publishes for Twin Lake Eastern 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 90 µg/L. TSI 67.
| 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 | 90µg/L | Poor 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. | 67 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Twin Lake Eastern Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Twin Lake Eastern Lake typically sits around 85°F at the surface in August. Summer average is about 84°F. Usually warmest in Jul (about 85°F) and coldest in Feb (about 63°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (63°F) to its warmest (85°F).
Typical surface water temperature by month, from 27 field readings (2021–2025) via the EPA Water Quality Portal. See the full Twin Lake Eastern Lake water temperature breakdown →
Stays via Stay22
Stays near Twin Lake Eastern Lake
Compare lakeside cabins, hotels, and vacation rentals near Twin Lake Eastern Lake in Okaloosa 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Twin Lake Eastern Lake are listed below.
Top-rated places to stay near Twin Lake Eastern Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Fishing Twin Lake Eastern Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Stable+2.57 µg/L/yr6 years
Nearby Lakes in Okaloosa County
Frequently asked questions about Twin Lake Eastern Lake
Where is Twin Lake Eastern Lake?
- Twin Lake Eastern Lake is a lake in Okaloosa County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Twin Lake Eastern Lake?
- Twin Lake Eastern Lake in Okaloosa County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 90 µg/L.
Is Twin Lake Eastern Lake safe to swim in?
- Based on E. coli testing, Twin Lake Eastern Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 18.2% of 11 samples across 2 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Twin Lake Eastern Lake is safe to swim in today is a call for Florida's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of Twin Lake Eastern Lake?
- Twin Lake Eastern Lake typically sits around 85°F at the surface in August, from 27 EPA Water Quality Portal field readings (2021–2025). That is a typical value for the month, not a live reading.
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Where this data comes from
43 measurements from 1 monitoring station, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FL Dept. of Environmental Protection, Northwest District
21FLPNS_WQX43 samples · 2021–2025
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.