Louise Lake
Louise Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 3.6 ft visibility. Phosphorus: 9.5 µg/L.
- Clarity
- 3.6 ft
- Typical in August
- 89°F
- Max depth
- ~60 ft est.
- Type
- Mesotrophic
- Trend
- ↓ Declining
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Louise Lake is a mesotrophic lake in Orange County, Florida with an estimated average depth of about 60 feet. Water quality is graded B based on 1 sampling years through 2025. Overall water quality is declining over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Louise Lake ranks #42 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-02-11. 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, Louise Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 16 samples across 5 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)
Murky, only visible to about 3.6 ft. Phosphorus level: 9.5 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.6 ft | Not graded |
| Phosphorus | 9.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Louise Lake
Compare lakeside cabins, hotels, and vacation rentals near Louise 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 Louise Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Louise Lake typically sits around 89°F at the surface in August. Summer average is about 88°F. Usually warmest in Aug (about 89°F) and coldest in Jan (about 58°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 24 field readings (2010–2025) via the EPA Water Quality Portal.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~60 ft est. |
| Average Depth | ~8 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Florida has not published bathymetry for Louise Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Louise Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.175 m/yr | 5 |
| Phosphorus | ↓ Declining | +1.65 µg/L/yr | 5 |
EPA Impairment Status
Louise Lake 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 FL3003 · Official waterbody report · Matched by proximity (2.04 km)
County Ranking
Ranked #42 of 320 lakes in Orange County
Nearby Lakes in Orange County
Frequently asked questions about Louise Lake
Where is Louise Lake?
- Louise 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 Louise Lake?
- Louise Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 3.6 ft visibility. Phosphorus: 9.5 µg/L.
Is Louise Lake safe to swim in?
- Based on E. coli testing, Louise Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 16 samples across 5 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Louise 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 Louise Lake?
- Louise Lake typically sits around 89°F at the surface in August, from 24 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
How deep is Louise Lake?
- No published bathymetric survey covers Louise Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 60 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Louise Lake across LakeQuality
Planning a trip around Canaveral?
Louise Lake is about 25 miles from Canaveral National Seashore. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Canaveral →More Florida Lake Rankings
Other Grade B Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
36 measurements from 1 monitoring station, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples36 samples · 2022–2025
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
Lake size & watershed from HydroLAKES (HydroSHEDS)