B

Mirror Lake

Seminole County, FloridaMesotrophic

Mirror Lake is a mesotrophic lake in Seminole County, Florida. Water quality is graded B based on 2 sampling years through 2025. Compared to the 167 other monitored lakes in Seminole County, Mirror Lake ranks #31 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-07-22. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 7.2 ft. Phosphorus level: 20 µg/L. Trophic State Index: 48.

Metric	Value	Grade
Water Clarity (Secchi Depth)	7.2 ft	C
Phosphorus	20 µg/L	B
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	48	Mesotrophic

Moderate nutrients, good water quality

Location

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County Ranking

Ranked #31 of 168 lakes in Seminole County

Cleaner Lakes Within 30 Miles

Mirror Lake holds Grade B. 4 nearby lakes hold higher grades.

See full comparison →

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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 B Lakes in Florida

Bay-Deer Point Lake

Bay County · Clarity: 4 ft

Brevard-Clear Lake

Brevard County · Clarity: 9.8 ft

Alachua-Santa Fe Painter Canal Lake

Alachua County · Clarity: 5.5 ft

Marion-Deerback Lake

Marion County · Clarity: 7 ft

Hillsborough-Flynn Lake

Hillsborough County · Clarity: 6 ft

Western Lake Middle

Walton County · Clarity: 4 ft

Mesotrophic Lakes in Florida

Bay-Deer Point Lake Brevard-Clear Lake Marion-Deerback Lake Hillsborough-Flynn Lake

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-07-22

Monitoring stations: 1

Where to stay near Mirror Lake

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