Calhoun County Lake Quality
Texas, 1 lakes, average grade D (Poor)
Only 1 lakes in Calhoun County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. On average, Calhoun County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Cox Lake (D) is the cleanest in the county.
Quick Answers for Calhoun County
Planning a trip? Check special fishing regulations for Cox Lake — or check the official Texas fishing regulations.
All Lakes in Calhoun County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Cox Lake | D | 0.7 ft | 303 µg/L |
Other Counties in Texas
See how Calhoun County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 17 states.
Where to stay near Calhoun County
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Source: EPA National Aquatic Resource Surveys, 2026.