Where is Pinellas-Tarpon Lake?

Pinellas-Tarpon Lake is a lake in Pinellas County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.

Is Pinellas-Tarpon Lake safe to swim in?

Good for swimming, clear water with low algae levels. Pinellas-Tarpon Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.

Pinellas-Tarpon Lake

Grade B — Good

Good · #5 of 34 lakes in the county · 3 ft clear · Eutrophic · ↑ from C

Limited DataEutrophic

Pinellas-Tarpon Lake in Pinellas County, Florida has a water quality grade of B (Good). Water clarity: 3 ft visibility. Phosphorus: 31 µg/L.

Clarity: 3 ft
Type: Eutrophic
Trend: → Stable

Where to stay →Safe to swim?

Next lake in Pinellas County

CLake Tarpon Canal3.6 ft clear · Pinellas CountyView →

PrevPinellas-Salmons Bay Lake Where to stay NextLake Tarpon Canal

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Pinellas-Tarpon Lake is a productive, nutrient-rich eutrophic lake in Pinellas County, Florida. Water quality is graded B based on 1 sampling years through 2023. Water clarity is declining over recent sampling years. Compared to the 33 other monitored lakes in Pinellas County, Pinellas-Tarpon Lake ranks #5 for water quality.

Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-04-22. Grade methodology: LakeQuality methodology.

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Swimming Safety

Grade only

Limited data

Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.

Good for swimming, clear water with low algae levels

Get alerts for Pinellas-Tarpon Lake →

Water Quality Grade: B (Good)

Very murky, less than 3 ft of visibility. Phosphorus level: 31 µg/L. Trophic State Index: 57.

Metric	Value	Grade
Water Clarity (Secchi Depth)	3 ft	Not graded
Phosphorus	31 µg/L	Good
Chlorophyll-a (Algae)	No recent samples
Trophic State Index (TSI)	57	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Pinellas-Tarpon Lake

Compare lakeside cabins, hotels, and vacation rentals near Pinellas-Tarpon Lake in Pinellas County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Pinellas-Tarpon Lake

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Planning a whole trip? See where to stay at Florida’s top lakes →

Fishing Pinellas-Tarpon Lake

→ Pinellas-Tarpon Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: → Stable

Based on 5 years of monitoring data (2020-2025).

Metric	Trend	Change/Year	Years
Water Clarity	↓ Declining	-0.021 m/yr	5
Phosphorus	↑ Improving	-2 µg/L/yr	5

See year-by-year chart →

EPA Impairment Status

Pinellas-Tarpon Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growthImpaired biota (cause unknown)Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit FL1486A · Official waterbody report · Matched by proximity (0.18 km)

County Ranking

Ranked #5 of 34 lakes in Pinellas County

Nearby Lakes in Pinellas County

BLake Tarpon2.3 ft clear · EutrophicView →BPinellas-Salmons Bay Lake2.5 ft clear · EutrophicView →NRLittle Salt Lake NeView →CPinellas-Autu Lake2.8 ft clear · EutrophicView →BPinellas-Meadow West Lake5 ft clear · EutrophicView →CLake Tarpon Canal3.6 ft clear · EutrophicView →

Frequently asked questions about Pinellas-Tarpon Lake

Where is Pinellas-Tarpon Lake?: Pinellas-Tarpon Lake is a lake in Pinellas County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Pinellas-Tarpon Lake?: Pinellas-Tarpon Lake in Pinellas County, Florida has a water quality grade of B (Good). Water clarity: 3 ft visibility. Phosphorus: 31 µg/L.
Is Pinellas-Tarpon Lake safe to swim in?: Good for swimming, clear water with low algae levels. Pinellas-Tarpon Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.

Explore Pinellas-Tarpon Lake across LakeQuality

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Species activity outlook by water temperature and season

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Eutrophic Lakes

High nutrients, frequent algae, reduced clarity

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Other Grade B Lakes in Florida

Hillsborough-Dan Lake

Hillsborough County · 4.8 ft

Hillsborough-Breckenridge Lake

Hillsborough County · 9 ft

Lake Dan @ Center

Hillsborough County · 3.3 ft

Hillsborough-Garden Lake

Hillsborough County · 4.3 ft

Lake Jackson @ Center

Hillsborough County · 3.6 ft

Hillsborough-Sunset Lake

Hillsborough County · 3.5 ft

Eutrophic Lakes in Florida

Hillsborough-Dan Lake Lake Dan Lake Breckenridge Lake Dan @ Center

Where this data comes from

51 measurements from 3 monitoring stations, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

FLORIDA LAKEWATCH21FLKWAT_WQX51 samples · 2022–2023

Monitoring station identifiers (3)

Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.

Other records on this page

Impairment status from EPA ATTAINS 303(d) database