Ft. Cobb Lake
Caddo County, Oklahoma13 acresView mapDirections
Oklahoma DEQ publishes the water-quality measurements for Ft. Cobb Lake. Here is what has been measured.
- Hypereutrophic
- Limited data
Ft. Cobb Lake in Caddo County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Phosphorus: 220 µg/L. Surface area: 13 acres.
Ft. Cobb Lake is a 13-acre highly nutrient-loaded hypereutrophic lake in Caddo County, Oklahoma. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2025-09-29. 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 Ft. Cobb Lake is safe to swim in today is a call for the Oklahoma Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Ft. Cobb Lake
These are the measurements Oklahoma DEQ publishes for Ft. Cobb Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 220 µg/L. TSI 82.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 220µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 82 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Ft. Cobb Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
13 acres
No bathymetric survey has been published for Ft. Cobb Lake, so its depth is not documented here.
Stays via Stay22
Stays near Ft. Cobb Lake
Compare lakeside cabins, hotels, and vacation rentals near Ft. Cobb Lake in Caddo 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Ft. Cobb Lake are listed below.
Top-rated places to stay near Ft. Cobb Lake
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Fishing Ft. Cobb Lake
Water quality readings over time
2 seasons of samples on record (2024–2025). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Improving-80 µg/L/yr2 years
Reservoir Info (USACE NID)
Ft. Cobb Lake is a man-made reservoir impounded by the SCS-Sugar Creek Site-046 (completed 1971), built primarily for flood risk reduction on the Tr-Washita River, 41 ft tall and 650 ft long.
- Surface area
- 13 ac
- Normal storage
- 66 ac-ft
- Max storage
- 204 ac-ft
- Drainage area
- 1.61 sq mi
- Hazard class
- Low
- Owner
- SOUTH CADDO CONS DIST
Source: USACE National Inventory of Dams, NID ID OK20796 · Operator website · Matched by proximity (0.81 km)
Nearby Lakes in Caddo County
Frequently asked questions about Ft. Cobb Lake
Where is Ft. Cobb Lake?
- Ft. Cobb Lake is a lake in Caddo County, Oklahoma. Its water-quality measurements are published by Oklahoma DEQ and shown on this page as reported.
What is the water quality of Ft. Cobb Lake?
- Ft. Cobb Lake in Caddo County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Phosphorus: 220 µg/L. Surface area: 13 acres.
Is Ft. Cobb Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Ft. Cobb Lake across LakeQuality
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Hypereutrophic Lakes in Oklahoma
Where this data comes from
37 measurements from 1 monitoring station, 2023–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wichita Department of Environmental Programs (Tribal)
WDEP_WQX37 samples · 2023–2025
Analytical methods
- 4500 P B ~ Phosphorus, sample preparation method
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.