Moffit Lake
Union County, Kentucky49 acresView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↑ up from C at the last regrade
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- #1 of 2 in the county
- 45 ft max depth
- Public access
Moffit Lake in Union County, Kentucky has a water quality grade of B (Good). Phosphorus: 30 µg/L. Surface area: 48.6 acres.
- Max depth
- ~45 ft est.
- Area
- 49 acres
- Type
- Eutrophic
- Phosphorus
- 30 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Moffit Lake’s letter
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Moffit Lake is a 49-acre productive, nutrient-rich eutrophic lake in Union County, Kentucky with an estimated average depth of about 45 feet. Water quality is graded B based on 1 sampling years through 2021. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 1 other monitored lakes in Union County, Moffit Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, KY DOW, last sampled 2021-09-16. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Moffit Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water Quality Grade: B (Good)
No clarity data. Phosphorus 30 µg/L. TSI 53. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 30 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~45 ft est. |
| Average Depth | ~11 ft est. |
| Surface Area | 49 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Kentucky has not published bathymetry for Moffit Lake.
Lake Size & Watershed
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.
Fishing Moffit Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +2.08 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Moffit Lake is a man-made reservoir impounded by the Cypress Creek Lake FRS No 3 (completed 1965), built primarily for recreation on the Cypress Creek; earth-type dam, 31 ft tall and 800 ft long.
- Surface area
- 48.6 ac
- Normal storage
- 414 ac-ft
- Max storage
- 700 ac-ft
- Drainage area
- 0.68 sq mi
- Hazard class
- Low
- Owner
- CYPRESS CREEK CONSERVANCY DISTRICT
Source: USACE National Inventory of Dams, NID ID KY00031 · Operator website
EPA Impairment Status
Moffit Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit KY-1323 · Official waterbody report
County Ranking
Ranked #1 of 2 lakes in Union County
Nearby Lakes in Union County
Frequently asked questions about Moffit Lake
Where is Moffit Lake?
- Moffit Lake is a lake in Union County, Kentucky. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Moffit Lake?
- Moffit Lake in Union County, Kentucky has a water quality grade of B (Good). Phosphorus: 30 µg/L. Surface area: 48.6 acres.
Is Moffit Lake safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Moffit Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Moffit Lake?
- No published bathymetric survey covers Moffit Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 45 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 48.6 acres.
Explore Moffit Lake across LakeQuality
More Kentucky Lake Rankings
Other Grade B Lakes in Kentucky
Eutrophic Lakes in Kentucky
Where this data comes from
24 measurements from 3 monitoring stations, 2016–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- KY WQX
21KY_WQX24 samples · 2016–2021
Analytical methods
- Phosphorus by Colorimetry
- Total Phosphorus After Block Digestion
- Turbidity by Nephelometry
Monitoring station identifiers (3)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)