What is the water quality grade for Red Bug Slough Lake?

Red Bug Slough Lake in Sarasota County, Florida received a water quality grade of F (Very Poor). Phosphorus: 141 µg/L.

Is Red Bug Slough Lake safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Red Bug Slough Lake has an overall water quality grade of F. Always check local health department advisories before swimming.

Red Bug Slough Lake

Sarasota County, FloridaLimited DataHypereutrophic

Red Bug Slough Lake is a highly nutrient-loaded hypereutrophic lake in Sarasota County, Florida. Water quality is graded F based on 1 sampling years through 2025. Compared to the 37 other monitored lakes in Sarasota County, Red Bug Slough Lake ranks #38 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-07-21. Grade methodology: LakeGrade methodology.

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

No clarity data. Phosphorus level: 141 µg/L. Trophic State Index: 76.

Metric	Value	Grade
Water Clarity (Secchi Depth)	No data
Phosphorus	141 µg/L	F
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	76	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Location

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County Ranking

Ranked #38 of 38 lakes in Sarasota County

Cleaner Lakes Within 30 Miles

Red Bug Slough Lake holds Grade F. 5 nearby lakes hold higher grades.

Nearby Lakes in Sarasota County

Sarasota-Cormorant Lake

Sarasota County

Sarasota-Spoonbill Lake

Sarasota County

Sarasota-Moondrop Lake

Sarasota County

Sarasota-Sundrop Lake

Sarasota 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 F Lakes in Florida

Polk-Little Bass Lake

Polk County · Clarity: 1.3 ft

Polk-Big Bass Lake

Polk County · Clarity: 1 ft

Alachua-Wauberg Lake

Alachua County · Clarity: 2.4 ft

Lake Roberta

Hillsborough County · Clarity: 1.3 ft

Volusia Lake George @ N of Center

Volusia County · Clarity: 2 ft

Lwc Lake

Brevard County · Clarity: 1.6 ft

Hypereutrophic Lakes in Florida

Polk-Little Bass Lake Alicetst Lake Polk-Big Bass Lake Lake Roberta

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-07-21

Monitoring stations: 1

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