Blue Crab Lake
Blue Crab Lake in Lee County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 135 µg/L.
- Type
- Hypereutrophic
- Trend
- ↑ Improving
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Blue Crab Lake →
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Blue Crab Lake is a highly nutrient-loaded hypereutrophic lake in Lee County, Florida. Water quality is graded D based on 1 sampling years through 2025. Overall water quality is improving over recent sampling years. Public access is available with 1 public boat landing. Compared to the 73 other monitored lakes in Lee County, Blue Crab Lake ranks #30 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-04-22. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus level: 135 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 135 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Blue Crab Lake
Compare lakeside cabins, hotels, and vacation rentals near Blue Crab Lake in Lee 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 grade measures nutrients and algae, not lodging — cabins and rentals around Blue Crab Lake are listed below.
Top-rated places to stay near Blue Crab Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Recreation & Access
- Castaways MarinaSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Blue Crab Lake
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -76.75 µg/L/yr | 3 |
EPA Impairment Status
Blue Crab 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 FL2092G1 · Official waterbody report · Matched by proximity (1.58 km)
County Ranking
Ranked #30 of 74 lakes in Lee County
Nearby Lakes in Lee County
Frequently asked questions about Blue Crab Lake
Where is Blue Crab Lake?
- Blue Crab Lake is a lake in Lee County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Blue Crab Lake?
- Blue Crab Lake in Lee County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 135 µg/L.
Is Blue Crab Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Blue Crab Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Are there boat ramps on Blue Crab Lake?
- Blue Crab Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Castaways Marina.
Explore Blue Crab Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic Lakes in Florida
Where this data comes from
5 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples5 samples · 2020–2025
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory