Hiawatha Lake
Hiawatha Lake in Lake County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.8 ft visibility. Phosphorus: 42.4 µg/L.
- Clarity
- 2.8 ft
- Typical in August
- 86°F
- Trend
- ↓ Declining
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Why Hiawatha Lake 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 Hiawatha Lake, 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.
Hiawatha Lake is a lake in Lake County, Florida. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-01-28. 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 Hiawatha Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.8 ft of visibility. Phosphorus level: 42.4 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 ft | Not graded |
| Phosphorus | 42.4 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hiawatha Lake
Compare lakeside cabins, hotels, and vacation rentals near Hiawatha Lake in Lake 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 Hiawatha Lake
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Water Temperature
Hiawatha Lake typically sits around 86°F at the surface in August. Summer average is about 87°F. Usually warmest in Jun (about 87°F) and coldest in Jan (about 59°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 20 field readings (2010–2025) via the EPA Water Quality Portal. See the full Hiawatha Lake water temperature breakdown →
Fishing Hiawatha Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.253 m/yr | 6 |
| Phosphorus | ↓ Declining | +6.69 µg/L/yr | 6 |
EPA Impairment Status
Hiawatha Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2839A · Official waterbody report · Matched by proximity (1.39 km)
Graded lakes near Hiawatha Lake
Hiawatha Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Lake County
Frequently asked questions about Hiawatha Lake
Where is Hiawatha Lake?
- Hiawatha Lake is a lake in Lake 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 Hiawatha Lake?
- Hiawatha Lake in Lake County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.8 ft visibility. Phosphorus: 42.4 µg/L.
Is Hiawatha Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Hiawatha Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Hiawatha Lake?
- Hiawatha Lake typically sits around 86°F at the surface in August, from 20 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Hiawatha Lake across LakeQuality
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Where this data comes from
8 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples8 samples · 2024–2025
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