Osage City Reservoir
Osage County, Kansas50 acresView mapDirections
No nutrient or algae sampling on record from KDHE for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 10 ft max depth
Osage City Reservoir in Osage County, Kansas has water-quality measurements published by KDHE, shown here as reported. Maximum depth: 10 ft. Surface area: 50 acres.
Osage City Reservoir is a 50-acre lake in Osage County, Kansas with a maximum depth of 10 feet (4-foot average).
Source: EPA Water Quality Portal sampling records, KDHE. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Osage City Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Osage City Reservoir 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 City Reservoir
These are the measurements KDHE publishes for Osage 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. TSI undefined.
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Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
10 ft
Average depth
4.3 ft
Surface area
50 acres
Shoreline
2.3 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Osage City Reservoir
EPA Impairment Status
Osage City Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Drinking water, Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit KS-LM066101 · Official waterbody report
Nearby Lakes in Osage County
Frequently asked questions about Osage City Reservoir
Where is Osage City Reservoir?
- Osage City Reservoir 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 City Reservoir?
- Osage City Reservoir in Osage County, Kansas has water-quality measurements published by KDHE, shown here as reported. Maximum depth: 10 ft. Surface area: 50 acres.
Is Osage City Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Osage City Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Osage City Reservoir?
- Osage City Reservoir has a maximum depth of 10 feet and an average depth of 4.3 feet. The lake covers 50 acres.
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Where this data comes from
Measurements for Osage City Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database