Pinellas-Crescent Lake
Pinellas County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Pinellas-Crescent Lake. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
Pinellas-Crescent Lake in Pinellas County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4 ft visibility. Phosphorus: 77 µg/L.
Pinellas-Crescent Lake is a productive, nutrient-rich eutrophic lake in Pinellas County, Florida. Overall water quality is declining over recent sampling years. Compared to the 33 other monitored lakes in Pinellas County, Pinellas-Crescent Lake ranks #20 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-29. Methodology: how these readings are compared.
Swimming conditions
Readings onlyRecreation use not supported
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Based on E. coli testing, Pinellas-Crescent Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 16% of 50 samples across 8 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Whether Pinellas-Crescent Lake is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Pinellas-Crescent Lake
These are the measurements Florida DEP publishes for Pinellas-Crescent Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4 ft. Phosphorus 77 µg/L. TSI 62.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 77µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 62 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Pinellas-Crescent Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Pinellas-Crescent Lake typically sits around 80°F at the surface in October. Summer average is about 84°F. Usually warmest in Jun (about 87°F) and coldest in Jan (about 62°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (62°F) to its warmest (87°F).
Typical surface water temperature by month, from 115 field readings (2010–2025) via the EPA Water Quality Portal. See the full Pinellas-Crescent Lake water temperature breakdown →
Stays via Stay22
Stays near Pinellas-Crescent Lake
Compare lakeside cabins, hotels, and vacation rentals near Pinellas-Crescent 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Pinellas-Crescent Lake are listed below.
Top-rated places to stay near Pinellas-Crescent Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Fishing Pinellas-Crescent Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening4 years
Phosphorus
Worsening+11 µg/L/yr5 years
EPA Impairment Status
Pinellas-Crescent Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5A).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
Source: EPA ATTAINS assessment unit FL1700A · Official waterbody report
Nearby Lakes in Pinellas County
Frequently asked questions about Pinellas-Crescent Lake
Where is Pinellas-Crescent Lake?
- Pinellas-Crescent Lake is a lake in Pinellas County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Pinellas-Crescent Lake?
- Pinellas-Crescent Lake in Pinellas County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4 ft visibility. Phosphorus: 77 µg/L.
Is Pinellas-Crescent Lake safe to swim in?
- Based on E. coli testing, Pinellas-Crescent Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 16% of 50 samples across 8 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Pinellas-Crescent Lake is safe to swim in today is a call for Florida's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of Pinellas-Crescent Lake?
- Pinellas-Crescent Lake typically sits around 80°F at the surface in October, from 115 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
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Where this data comes from
249 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX249 samples · 2020–2025
Monitoring station identifiers (3)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database