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C

Mrshllake

Orange County, FloridaEutrophic

Mrshllake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded C based on 2 sampling years through 2021. Compared to the 531 other monitored lakes in Orange County, Mrshllake ranks #370 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2021-05-18. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 3.9 ft. Phosphorus level: 26 µg/L. Trophic State Index: 54.

MetricValueGrade
Water Clarity (Secchi Depth)3.9 ftD
Phosphorus26 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)54Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #370 of 532 lakes in Orange County

Cleaner Lakes Within 30 Miles

Mrshllake holds Grade C. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Orange County

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Marshall Lake
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Lake Heiniger
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Dreamlk Lake
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Dream Lake
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Lakemccoy
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Mccoy Lake
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More Florida Lake Rankings

Cleanest lakes in Florida

Top 25 by overall water quality score

Best swimming lakes in Florida

Grade A/B + low algae filter

Family fishing lakes in Florida

Panfish-rich, public access

All Florida lakes

Full state directory

Other Grade C Lakes in Florida

Eastern Lake Outlet

Walton County · Clarity: 4.2 ft

Seminole-Secret Lake

Seminole County · Clarity: 4.5 ft

Spring Lake

Seminole County · Clarity: 2.9 ft

Polk-Fannie Lake

Polk County · Clarity: 3.5 ft

Volusia-North Talmadge Lake

Volusia County · Clarity: 4.5 ft

Seminole-Spring Lake

Seminole County · Clarity: 3 ft

Eutrophic Lakes in Florida

Flagler-Emerald LakeEastern Lake OutletSeminole-Secret LakeFtt Lake

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 Of
    Apopka · 1.6 mi away · NPDES FLS266787
    Major

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.

Data Sources

Water quality data from the EPA Water Quality Portal

Regulated discharger data from EPA ECHO (ICIS-NPDES)

Grading methodology based on Metropolitan Council standards

Most recent sample: 2021-05-18

Monitoring stations: 1

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.

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