McCurtain County, Oklahoma · Water Quality Report Card
Broken Bow Lake
Broken Bow Lake in McCurtain County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.5 ft visibility.
- Clarity
- 8.5 ft
- Mean depth
- ~119 ft est.
- Type
- Mesotrophic
Broken Bow Lake is a mesotrophic lake in McCurtain County, Oklahoma with an estimated average depth of about 119 feet.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2023-10-03. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
Moderate clarity, visible to about 8.5 ft. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.5 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~119 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Oklahoma has not published bathymetry for Broken Bow Lake.
Where to stay near Broken Bow Lake
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Fishing Broken Bow Lake
Location
Nearby Lakes in McCurtain County
Explore Broken Bow Lake across LakeGrade
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Other Lakes in Oklahoma
Mesotrophic Lakes in Oklahoma
More records, surveys & data sources
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.
Where this data comes from
106 measurements from 8 monitoring stations, 2016–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- OWRB Lakes Monitoring
OKWRB-LAKES_WQX106 samples · 2016–2023
Analytical methods
- OWRB Lakes Field Data Collection
- Determination of Turbidity
Monitoring station identifiers (8)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2023-10-03
Monitoring stations: 8