Corbin City Reservoir
Laurel County, KentuckyView mapDirections
Kentucky DOW publishes the water-quality measurements for Corbin City Reservoir. Here is what has been measured.
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
Corbin City Reservoir in Laurel County, Kentucky has water-quality measurements published by Kentucky DOW, shown here as reported. Phosphorus: 30 µg/L.
Corbin City Reservoir is a productive, nutrient-rich eutrophic lake in Laurel County, Kentucky. Overall water quality is declining over recent sampling years. Compared to the 1 other monitored lakes in Laurel County, Corbin City Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, KY DOW, last sampled 2023-09-20. Methodology: how these readings are compared.
Swimming conditions
Readings onlyModerate algae
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.
Nutrient and algae readings are not a swimming clearance. Corbin City Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
Whether Corbin City Reservoir is safe to swim in today is a call for the Kentucky Division of Water and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Corbin City Reservoir
These are the measurements Kentucky DOW publishes for Corbin City Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 30 µg/L. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 30µg/L | Fair 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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Corbin City Reservoir
Water Quality Trend: Worsening
Based on 4 years of monitoring (2012–2023).
Phosphorus
Stable+0.33 µg/L/yr4 years
Chlorophyll-a
Worsening+14.8 µg/L/yr2 years
EPA Impairment Status
Corbin City Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit KY-2690 · Official waterbody report
Nearby Lakes in Laurel County
Frequently asked questions about Corbin City Reservoir
Where is Corbin City Reservoir?
- Corbin City Reservoir is a lake in Laurel County, Kentucky. Its water-quality measurements are published by Kentucky DOW and shown on this page as reported.
What is the water quality of Corbin City Reservoir?
- Corbin City Reservoir in Laurel County, Kentucky has water-quality measurements published by Kentucky DOW, shown here as reported. Phosphorus: 30 µg/L.
Is Corbin City Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Corbin City Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
Explore Corbin City Reservoir across LakeQuality
3 documented falls within 15.8 mi, nearest Vanhook Falls
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Where this data comes from
30 measurements from 2 monitoring stations, 2015–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- KY WQX
21KY_WQX30 samples · 2015–2023
Analytical methods
- Phosphorus by Colorimetry
- Total Phosphorus After Block Digestion
- Turbidity by Nephelometry
Monitoring station identifiers (2)
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