Lkminnie Lake
Lkminnie Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.3 ft visibility. Phosphorus: 63.5 µg/L.
- Clarity
- 2.3 ft
- Typical in August
- 83°F
- Type
- Eutrophic
- Trend
- ↑ Improving
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Lkminnie Lake →
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Lkminnie Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded D based on 1 sampling years through 2021. Overall water quality is improving over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Lkminnie Lake ranks #115 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-08-05. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria D · advisory
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, Lkminnie Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 14.3% of 14 samples across 2 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: D (Nutrient-rich)
Very murky, less than 2.3 ft of visibility. Phosphorus level: 63.5 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 63.5 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lkminnie Lake
Compare lakeside cabins, hotels, and vacation rentals near Lkminnie Lake in Seminole 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Lkminnie Lake are listed below.
Top-rated places to stay near Lkminnie Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Lkminnie Lake typically sits around 83°F at the surface in August. Summer average is about 84°F. Usually warmest in Jul (about 87°F) and coldest in Jan (about 61°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 48 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lkminnie Lake water temperature breakdown →
Fishing Lkminnie Lake
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.02 m/yr | 6 |
| Phosphorus | ↑ Improving | -3.83 µg/L/yr | 6 |
EPA Impairment Status
Lkminnie Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL2984 · Official waterbody report · Matched by proximity (0.94 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lkminnie Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Seminole Co & Co App - MS4Sanford · 0.2 mi away · NPDES FLS000038Major
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
County Ranking
Ranked #115 of 122 lakes in Seminole County
Nearby Lakes With Higher Grades
Lkminnie Lake holds Grade D. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Seminole County
Frequently asked questions about Lkminnie Lake
Where is Lkminnie Lake?
- Lkminnie Lake is a lake in Seminole County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lkminnie Lake?
- Lkminnie Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.3 ft visibility. Phosphorus: 63.5 µg/L.
Is Lkminnie Lake safe to swim in?
- Based on E. coli testing, Lkminnie Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 14.3% of 14 samples across 2 seasons. That works out to a bacteria swim-safety grade of D — a historical summary of past testing, not a current reading. Lkminnie Lake has a water quality grade of D (Nutrient-rich). 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 Lkminnie Lake?
- Lkminnie Lake typically sits around 83°F at the surface in August, from 48 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Lkminnie Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
16 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples16 samples · 2020–2021
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)