What is the water quality grade for Liberty-Mystic Lake?

Liberty-Mystic Lake in Liberty County, Florida received a water quality grade of A (Excellent). Water clarity: 13 ft visibility. Phosphorus: 7 µg/L.

Is Liberty-Mystic Lake safe to swim in?

Excellent for swimming, crystal clear water with minimal algae. Liberty-Mystic Lake has an overall water quality grade of A. Always check local health department advisories before swimming.

Liberty-Mystic Lake

Liberty County, FloridaOligotrophic

Liberty-Mystic Lake is a cold, clear oligotrophic lake in Liberty County, Florida. Water quality is graded A based on 2 sampling years through 2025. Compared to the 2 other monitored lakes in Liberty County, Liberty-Mystic Lake ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-02-10. Grade methodology: LakeGrade methodology.

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Good clarity, visible to about 13 ft. Phosphorus level: 7 µg/L. Trophic State Index: 36.

Metric	Value	Grade
Water Clarity (Secchi Depth)	13 ft	B
Phosphorus	7 µg/L	A
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	36	Oligotrophic

Low nutrients, clear water, excellent for swimming

Location

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County Ranking

Ranked #1 of 3 lakes in Liberty County

Nearby Lakes in Liberty County

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 A Lakes in Florida

Highlands-Sirena Lake

Highlands County · Clarity: 16 ft

Campbell Lake Middle

Walton County · Clarity: 9 ft

Highlands-Verona Lake

Highlands County · Clarity: 13.2 ft

Seminole-Crystal Bowl Lake

Seminole County · Clarity: 11 ft

Seminole-Silver Lake

Seminole County · Clarity: 13 ft

Orange-Olivia Lake

Orange County · Clarity: 11.5 ft

Oligotrophic Lakes in Florida

Highlands-Sirena Lake Highlands-Verona Lake Volusia-Winnemissett Lake Bay-St. Andrew Bay Lake

Lake Size & Watershed

Watershed (drainage) area

1 sq mi

Surface area

101 acres

Mean depth (est.)

12.1 ft

Shoreline

1.5 mi

Elevation

144 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.

Data Sources

Water quality data from the EPA Water Quality Portal

Lake size & watershed from HydroLAKES (HydroSHEDS)

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-02-10

Monitoring stations: 3

Where to stay near Liberty-Mystic Lake

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