Osage Co State Fishing Lake
Osage County, KansasView mapDirections
KDHE publishes the water-quality measurements for Osage Co State Fishing Lake. Here is what has been measured.
- Mesotrophic
- 42 ft max depth
- Public access
- Limited data
Osage Co State Fishing Lake in Osage County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 6.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6 µg/L.
Osage Co State Fishing Lake is a mesotrophic lake in Osage County, Kansas with an estimated average depth of about 42 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 4 other monitored lakes in Osage County, Osage Co State Fishing Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2017-08-02. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Osage Co State Fishing Lake is safe to swim in today is a call for the Kansas Department of Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Osage Co State Fishing Lake
These are the measurements KDHE publishes for Osage Co State Fishing Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 6.2 ft. Phosphorus 20 µg/L. Chlorophyll-a 6 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 6µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Osage Co State Fishing Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~42 ft est.
Public access
Yes
Listed by KDHE
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Kansas has not published bathymetry for Osage Co State Fishing Lake.
Lake Size & Watershed
Watershed (drainage) area
3 sq mi
HydroLAKES / HydroSHEDS
Surface area
96 acres
HydroLAKES / HydroSHEDS
Shoreline
3 mi
HydroLAKES / HydroSHEDS
Elevation
1,086 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.
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Fishing Osage Co State Fishing Lake
Water quality readings over time
2 seasons of samples on record (2013–2017). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Phosphorus
Stable0 µg/L/yr2 years
Chlorophyll-a
Worsening+0.15 µg/L/yr2 years
Reservoir Info (USACE NID)
Osage Co State Fishing Lake is a man-made reservoir impounded by the Osage State Fishing Lake (completed 1955) on the One Hundred-Ten Mile Creek-Tr, 49 ft tall and 1,120 ft long.
- Normal storage
- 2,085 ac-ft
- Max storage
- 2,533 ac-ft
- Hazard class
- Low
- Owner
- KANSAS DEPT OF WILDLIFE PARKS & TOURISM
Source: USACE National Inventory of Dams, NID ID KS00888 · Operator website · Matched by proximity (0.21 km)
Nearby Lakes in Osage County
Frequently asked questions about Osage Co State Fishing Lake
Where is Osage Co State Fishing Lake?
- Osage Co State Fishing Lake is a lake in Osage County, Kansas. Its water-quality measurements are published by KDHE and shown on this page as reported.
What is the water quality of Osage Co State Fishing Lake?
- Osage Co State Fishing Lake in Osage County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 6.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6 µg/L.
Is Osage Co State Fishing Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Osage Co State Fishing Lake?
- No published bathymetric survey covers Osage Co State Fishing Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 42 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Can I fish at Osage Co State Fishing Lake?
- Public access to Osage Co State Fishing Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Kansas's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
10 measurements from 1 monitoring station, 2013–2017. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX10 samples · 2013–2017
Analytical methods
- Depth, Secchi disk depth
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)