Red Water Lake
Red Water Lake in Highlands County, Florida has a water quality grade of B (Good). Water clarity: 3.3 ft visibility. Phosphorus: 14 µg/L.
- Clarity
- 3.3 ft
- Typical in August
- 86°F
- Type
- Eutrophic
- Trend
- ↑ Improving
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Red Water Lake is a productive, nutrient-rich eutrophic lake in Highlands County, Florida. Water quality is graded B based on 1 sampling years through 2024. Overall water quality is improving over recent sampling years. Compared to the 72 other monitored lakes in Highlands County, Red Water Lake ranks #56 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-08-29. 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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Very murky, less than 3.3 ft of visibility. Phosphorus level: 14 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | Not graded |
| Phosphorus | 14 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Red Water Lake
Compare lakeside cabins, hotels, and vacation rentals near Red Water Lake in Highlands 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 Red Water Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Red Water Lake typically sits around 86°F at the surface in August. Summer average is about 86°F. Usually warmest in Jul (about 87°F) and coldest in Feb (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 64 field readings (2014–2024) via the EPA Water Quality Portal. See the full Red Water Lake water temperature breakdown →
Fishing Red Water Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.08 m/yr | 5 |
| Phosphorus | ↑ Improving | -1.5 µg/L/yr | 5 |
EPA Impairment Status
Red Water 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 FL1938F · Official waterbody report
County Ranking
Ranked #56 of 73 lakes in Highlands County
Nearby Lakes in Highlands County
Frequently asked questions about Red Water Lake
Where is Red Water Lake?
- Red Water Lake is a lake in Highlands County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Red Water Lake?
- Red Water Lake in Highlands County, Florida has a water quality grade of B (Good). Water clarity: 3.3 ft visibility. Phosphorus: 14 µg/L.
Is Red Water Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Red Water Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Red Water Lake?
- Red Water Lake typically sits around 86°F at the surface in August, from 64 EPA Water Quality Portal field readings (2014–2024). That is a typical value for the month, not a live reading.
Explore Red Water Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
18 measurements from 1 monitoring station, 2023–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples18 samples · 2023–2024
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