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Louisa County, Virginia · Water Quality Report Card

Cocktail Cove Lake

Grade Not rated
Limited DataMesotrophic

Cocktail Cove Lake in Louisa County, Virginia is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.5 ft visibility.

Clarity
7.5 ft
Mean depth
~28 ft est.
Type
Mesotrophic
Trend
Stable

Cocktail Cove Lake is a mesotrophic lake in Louisa County, Virginia with an estimated average depth of about 28 feet.

Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled 2026-05-11. Grade methodology: LakeGrade methodology.

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Swimming Safety

Not rated for swimming — there is not enough monitoring data to judge this lake

Water Quality Grade: Not rated

Moderate clarity, visible to about 7.5 ft. Trophic State Index: 48.

MetricValueGrade
Water Clarity (Secchi Depth)7.5 ft
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)48Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Average Depth~28 ft est.

Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Virginia has not published bathymetry for Cocktail Cove Lake.

Where to stay near Cocktail Cove Lake

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Fishing Cocktail Cove Lake

Water Quality Trend: Stable

Based on 8 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.004 m/yr8
Phosphorus Stable-0.1 µg/L/yr7
Chlorophyll-a Stable-0.02 µg/L/yr7
See year-by-year chart →

Location

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Nearby Lakes in Louisa County

More records, surveys & data sources

Lake Size & Watershed

Watershed (drainage) area
343 sq mi
Surface area
11,028 acres
Mean depth (modeled estimate)
~28 ft est.
Shoreline
129.7 mi
Elevation
249 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.

Where this data comes from

11 measurements from 2 monitoring stations, 2024–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

  • VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY21VASWCB11 samples · 2024–2026

Analytical methods

  • Tyler, John. 1968. The secchi disk, Limnology and Oceanograpy, 13(1):1-6.
Monitoring station identifiers (2)

Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.

Data Sources

Water quality data from the EPA Water Quality Portal

Lake size & watershed from HydroLAKES (HydroSHEDS)

Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion

Most recent sample: 2026-05-11

Monitoring stations: 2

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