Leavenworth Co State Fishing Lake
Leavenworth County, Kansas175 acresView mapDirections
Nutrients and algae sit mid-range for this region.
↓ down from B at the last regrade
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- #2 of 2 in the county
- 32 ft max depth
- Limited data
Leavenworth Co State Fishing Lake in Leavenworth County, Kansas has a water quality grade of C (Fair). Water clarity: 4.3 ft visibility. Phosphorus: 25.5 µg/L. Chlorophyll-a (algae): 14.8 µg/L. Surface area: 175 acres.
- Clarity
- 4.3 ft
- Max depth
- ~32 ft est.
- Area
- 175 acres
- Type
- Eutrophic
- Phosphorus
- 25.5 µg/L
- Chlorophyll-a
- 14.8 µg/L
- Trend
- ↓ Declining
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Watch Leavenworth Co State Fishing Lake’s letter
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Leavenworth Co State Fishing Lake is a 175-acre productive, nutrient-rich eutrophic lake in Leavenworth County, Kansas with an estimated average depth of about 32 feet. Water quality is graded C based on 1 sampling years through 2018. Overall water quality is declining over recent sampling years. Compared to the 1 other monitored lakes in Leavenworth County, Leavenworth Co State Fishing Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2018-08-06. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
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 C is nutrients and algae, not a swimming clearance. Leavenworth Co State Fishing 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: C (Fair)
Murky, only visible to about 4.3 ft. Phosphorus 25.5 µg/L. Chlorophyll-a 14.8 µg/L. TSI 55. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.3 ft | Not graded |
| Phosphorus | 25.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 14.8 µg/L | Fair |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~32 ft est. |
| Average Depth | ~15 ft est. |
| Surface Area | 175 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Kansas has not published bathymetry for Leavenworth Co State Fishing 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 Leavenworth Co State Fishing Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.067 m/yr | 2 |
| Phosphorus | ↓ Declining | +1.17 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +1.4 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Leavenworth Co State Fishing Lake is a man-made reservoir impounded by the Leavenworth State Lake Dam (completed 1994), built primarily for fish and wildlife pond on the Ninemile Creek-Tr; earth-type dam, 77 ft tall and 1,240 ft long.
- Surface area
- 175 ac
- Normal storage
- 3,930 ac-ft
- Max storage
- 5,050 ac-ft
- Drainage area
- 3.81 sq mi
- Hazard class
- High
- Owner
- KANSAS DEPT OF WILDLIFE PARKS & TOURISM
Source: USACE National Inventory of Dams, NID ID KS00879 · Operator website · Matched by proximity (0.3 km)
EPA Impairment Status
Leavenworth Co State Fishing 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 KS-LM012301 · Official waterbody report · Matched by proximity (0.61 km)
County Ranking
Ranked #2 of 2 lakes in Leavenworth County
Nearby Lakes in Leavenworth County
Frequently asked questions about Leavenworth Co State Fishing Lake
Where is Leavenworth Co State Fishing Lake?
- Leavenworth Co State Fishing Lake is a lake in Leavenworth County, Kansas. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Leavenworth Co State Fishing Lake?
- Leavenworth Co State Fishing Lake in Leavenworth County, Kansas has a water quality grade of C (Fair). Water clarity: 4.3 ft visibility. Phosphorus: 25.5 µg/L. Chlorophyll-a (algae): 14.8 µg/L. Surface area: 175 acres.
Is Leavenworth Co State Fishing Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Leavenworth Co State Fishing 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 Leavenworth Co State Fishing Lake?
- No published bathymetric survey covers Leavenworth Co State Fishing Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 32 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 175 acres.
Explore Leavenworth Co State Fishing Lake across LakeQuality
More Kansas Lake Rankings
Other Grade C Lakes in Kansas
Eutrophic Lakes in Kansas
Where this data comes from
8 measurements from 1 monitoring station, 2012–2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX8 samples · 2012–2018
Analytical methods
- Depth, Secchi disk depth
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Lake size & watershed from HydroLAKES (HydroSHEDS)