Sarasota-Heron Lagoon Lake
Sarasota County, FloridaEutrophic
Sarasota-Heron Lagoon Lake is a productive, nutrient-rich eutrophic lake in Sarasota County, Florida. Water quality is graded D based on 2 sampling years through 2022. Compared to the 37 other monitored lakes in Sarasota County, Sarasota-Heron Lagoon Lake ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2022-02-20. Grade methodology: LakeGrade methodology.
Watch Sarasota-Heron Lagoon Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 3.5 ft. Phosphorus level: 74.5 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.5 ft | D |
| Phosphorus | 74.5 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #12 of 38 lakes in Sarasota County
Cleaner Lakes Within 30 Miles
Sarasota-Heron Lagoon Lake holds Grade D. 2 nearby lakes hold higher grades.
- CSarasota-Spoonbill LakeSarasota County · 2.4 mi · Higher grade (D → C)
- CSarasota-Sundrop LakeSarasota County · 5.1 mi · Higher grade (D → C)
Nearby Lakes in Sarasota County
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Sarasota-Heron Lagoon Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Siesta Key Utilities AuthoritySarasota · 2.8 mi away · NPDES FL0025755Major
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: 2022-02-20
Monitoring stations: 5
Where to stay near Sarasota-Heron Lagoon Lake
Compare lakeside cabins, hotels, and vacation rentals near Sarasota-Heron Lagoon Lake in Sarasota County, Florida — live availability and prices for your trip.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.