Crystlake
Crystlake in Lake County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.5 ft visibility. Phosphorus: 10 µg/L.
- Clarity
- 9.5 ft
- Typical in August
- 86°F
- Trend
- → Stable
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Why Crystlake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Crystlake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by FDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. Grade methodology: LakeQuality methodology.
Watch Crystlake water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Crystlake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 9.5 ft. Phosphorus level: 10 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.5 ft | Not graded |
| Phosphorus | 10 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Crystlake
Compare lakeside cabins, hotels, and vacation rentals near Crystlake in Lake 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 Crystlake
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Water Temperature
Crystlake typically sits around 86°F at the surface in August. 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.
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 →
Fishing Crystlake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.564 m/yr | 6 |
| Phosphorus | ↑ Improving | -2.33 µg/L/yr | 6 |
EPA Impairment Status
Crystlake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2839A · Official waterbody report · Matched by proximity (2.49 km)
Graded lakes near Crystlake
Crystlake has no grade, but these lakes within a short drive do.
Nearby Lakes in Lake County
Frequently asked questions about Crystlake
Where is Crystlake?
- Crystlake is a lake in Lake County, Florida. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Crystlake?
- Crystlake in Lake County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.5 ft visibility. Phosphorus: 10 µg/L.
Is Crystlake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Crystlake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Crystlake?
- Crystlake typically sits around 86°F at the surface in August, 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)
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