Osage Cove Lake
Osage County, OklahomaView mapDirections
Nutrients and algae run above the regional average.
- Eutrophic
- #5 of 7 in the county
- Public access
- Limited data
Osage Cove Lake in Osage County, Oklahoma has a water quality grade of D (Nutrient-rich). Phosphorus: 214 µg/L. Chlorophyll-a (algae): 16.9 µg/L.
- Type
- Eutrophic
- Phosphorus
- 214 µg/L
- Chlorophyll-a
- 16.9 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Stays near Osage Cove Lake
Compare lakeside cabins, hotels, and vacation rentals near Osage Cove Lake in Osage County, Oklahoma — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Osage Cove Lake are listed below.
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Osage Cove Lake is a productive, nutrient-rich eutrophic lake in Osage County, Oklahoma. Water quality is graded D based on 1 sampling years through 2021. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 6 other monitored lakes in Osage County, Osage Cove Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2021-03-02. Grade methodology: LakeQuality methodology.
What Osage Cove Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus 214 µg/L. Chlorophyll-a 16.9 µg/L. TSI 70. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 214 µg/L | Poor |
| Chlorophyll-a (Algae) | 16.9 µg/L | Not graded |
| Trophic State Index (TSI) | 70 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Recreation & Access
- Osage CovePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Osage Cove Lake
Water Quality Trend: ↑ Improving
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -75.42 µg/L/yr | 8 |
| Chlorophyll-a | ↑ Improving | -1.71 µg/L/yr | 5 |
County Ranking
Ranked #5 of 7 lakes in Osage County
Nearby Lakes in Osage County
Frequently asked questions about Osage Cove Lake
Where is Osage Cove Lake?
- Osage Cove Lake is a lake in Osage County, Oklahoma. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Osage Cove Lake?
- Osage Cove Lake in Osage County, Oklahoma has a water quality grade of D (Nutrient-rich). Phosphorus: 214 µg/L. Chlorophyll-a (algae): 16.9 µg/L.
Is Osage Cove Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Osage Cove Lake?
- Osage Cove Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Osage Cove. Public access is listed as yes.
Explore Osage Cove Lake across LakeQuality
More Oklahoma Lake Rankings
Other Grade D Lakes in Oklahoma
Eutrophic Lakes in Oklahoma
Where this data comes from
104 measurements from 1 monitoring station, 2014–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kaw Nation, Oklahoma (Tribal)
KAWNATON_WQX104 samples · 2014–2021
Analytical methods
- Phosphorus, Total Ascorbic Acid Method
- Phosphorus by Colorimetry
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
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
Named boat-access points from the USGS National Boat Ramps inventory