Mrshllake
Mrshllake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 3.9 ft visibility. Phosphorus: 26 µg/L.
- Clarity
- 3.9 ft
- Typical in August
- 88°F
- Type
- Eutrophic
- Trend
- → Stable
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Mrshllake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded B based on 1 sampling years through 2021. Water clarity is improving over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Mrshllake ranks #165 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-05-18. 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)
Murky, only visible to about 3.9 ft. Phosphorus level: 26 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | Not graded |
| Phosphorus | 26 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Mrshllake
Compare lakeside cabins, hotels, and vacation rentals near Mrshllake 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 Mrshllake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Mrshllake typically sits around 88°F at the surface in August. Summer average is about 87°F. Usually warmest in Aug (about 88°F) and coldest in Dec (about 68°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 25 field readings (2011–2021) via the EPA Water Quality Portal. See the full Mrshllake water temperature breakdown →
Fishing Mrshllake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.133 m/yr | 5 |
| Phosphorus | ↓ Declining | +0.9 µg/L/yr | 5 |
EPA Impairment Status
Mrshllake 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 FL2854A · Official waterbody report · Matched by proximity (0.01 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Mrshllake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Apopka, City OfApopka · 1.6 mi away · NPDES FLS266787Major
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 #165 of 320 lakes in Orange County
Nearby Lakes in Orange County
Frequently asked questions about Mrshllake
Where is Mrshllake?
- Mrshllake 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 Mrshllake?
- Mrshllake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 3.9 ft visibility. Phosphorus: 26 µg/L.
Is Mrshllake safe to swim in?
- Good for swimming, clear water with low algae levels. Mrshllake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Mrshllake?
- Mrshllake typically sits around 88°F at the surface in August, from 25 EPA Water Quality Portal field readings (2011–2021). That is a typical value for the month, not a live reading.
Explore Mrshllake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
12 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 samples12 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)