By the Sea Pond
By the Sea Pond in Lee County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 124.5 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 By the Sea Pond →
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By the Sea Pond is a highly nutrient-loaded hypereutrophic lake in Lee County, Florida. Water quality is graded D based on 1 sampling years through 2022. Overall water quality is improving over recent sampling years. Compared to the 73 other monitored lakes in Lee County, By the Sea Pond ranks #27 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-07-13. 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: 124.5 µg/L. Trophic State Index: 74.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 124.5 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 74 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near By the Sea Pond
Compare lakeside cabins, hotels, and vacation rentals near By the Sea Pond 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 By the Sea Pond are listed below.
Top-rated places to stay near By the Sea Pond
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Planning a whole trip? See where to stay at Florida’s top lakes →
Fishing By the Sea Pond
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -51 µg/L/yr | 2 |
EPA Impairment Status
By the Sea Pond 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 FL8059 · Official waterbody report · Matched by proximity (1.96 km)
County Ranking
Ranked #27 of 74 lakes in Lee County
Nearby Lakes in Lee County
Frequently asked questions about By the Sea Pond
Where is By the Sea Pond?
- By the Sea Pond 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 By the Sea Pond?
- By the Sea Pond in Lee County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 124.5 µg/L.
Is By the Sea Pond safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. By the Sea Pond has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Explore By the Sea Pond across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic Lakes in Florida
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)
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