Carl Lake
Carl Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 2.6 ft visibility. Phosphorus: 20 µg/L.
- Clarity
- 2.6 ft
- Typical in August
- 87°F
- Type
- Eutrophic
- Trend
- ↓ Declining
- Public access
- Yes
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Carl Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded B based on 1 sampling years through 2025. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 319 other monitored lakes in Orange County, Carl Lake ranks #31 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-04-14. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria A
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.
Based on E. coli testing, Carl Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 26 samples across 8 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Water Quality Grade: B (Good)
Very murky, less than 2.6 ft of visibility. Phosphorus level: 20 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 ft | Not graded |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Carl Lake
Compare lakeside cabins, hotels, and vacation rentals near Carl Lake in Orange 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 Carl Lake
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Water Temperature
Carl Lake typically sits around 87°F at the surface in August. Summer average is about 86°F. Usually warmest in Jul (about 87°F) and coldest in Feb (about 62°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 196 field readings (2010–2025) via the EPA Water Quality Portal. See the full Carl Lake water temperature breakdown →
Recreation & Access
- Trimble Park Public RampPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Carl Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.005 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.89 µg/L/yr | 6 |
EPA Impairment Status
Carl 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 FL2837B · Official waterbody report · Matched by proximity (0.05 km)
County Ranking
Ranked #31 of 320 lakes in Orange County
Nearby Lakes in Orange County
Frequently asked questions about Carl Lake
Where is Carl Lake?
- Carl Lake is a lake in Orange County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Carl Lake?
- Carl Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 2.6 ft visibility. Phosphorus: 20 µg/L.
Is Carl Lake safe to swim in?
- Based on E. coli testing, Carl Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 26 samples across 8 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Carl Lake has a water quality grade of B (Good). Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Carl Lake?
- Carl Lake typically sits around 87°F at the surface in August, from 196 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on Carl Lake?
- Carl Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Trimble Park Public Ramp. Public access is listed as yes.
Explore Carl Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
95 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- St. Johns River Water Management District
21FLSJWM_WQX95 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