Lake Dell
Lake Dell in Polk County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Phosphorus: 20 µg/L.
- Clarity
- 9.8 ft
- Trend
- ↑ Improving
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Why Lake Dell has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Dell, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by FDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Dell is a lake in Polk County, Florida. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-08-03. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lake Dell
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 9.8 ft. Phosphorus level: 20 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.8 ft | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Dell
Compare lakeside cabins, hotels, and vacation rentals near Lake Dell in Polk 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.
Top-rated places to stay near Lake Dell
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Fishing Lake Dell
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.046 m/yr | 6 |
| Phosphorus | ↑ Improving | -0.51 µg/L/yr | 6 |
Nearby Lakes in Polk County
Frequently asked questions about Lake Dell
Where is Lake Dell?
- Lake Dell is a lake in Polk County, Florida. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Lake Dell?
- Lake Dell in Polk County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Phosphorus: 20 µg/L.
Is Lake Dell safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Dell is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Lake Dell across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples2 samples · 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.