Crystlake
Lake County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Crystlake. Here is what has been measured.
- Limited data
Crystlake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 9.5 ft visibility. Phosphorus: 10 µg/L.
Crystlake is a lake in Lake County, Florida. Water clarity is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-08-01. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Crystlake 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 Crystlake
These are the measurements Florida DEP publishes for Crystlake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9.5 ft. Phosphorus 10 µg/L. TSI 41.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 41 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Crystlake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Crystlake typically sits around 82°F at the surface in September. Summer average is about 84°F. Usually warmest in Jun (about 89°F) and coldest in Jan (about 57°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (57°F) to its warmest (89°F).
Typical surface water temperature by month, from 26 field readings (2010–2022) via the EPA Water Quality Portal. See the full Crystlake water temperature breakdown →
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Stays near Crystlake
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Fishing Crystlake
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Improving-2.33 µg/L/yr6 years
Nearby Lakes in Lake County
Frequently asked questions about Crystlake
Where is Crystlake?
- Crystlake is a lake in Lake County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Crystlake?
- Crystlake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 9.5 ft visibility. Phosphorus: 10 µg/L.
Is Crystlake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Crystlake?
- Crystlake typically sits around 82°F at the surface in September, from 26 EPA Water Quality Portal field readings (2010–2022). That is a typical value for the month, not a live reading.
Explore Crystlake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples2 samples · 2022
Monitoring station identifiers (1)
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.