Falls County Lake Quality
Texas, 1 lakes, average grade F (Very Poor)
Falls County has 1 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is New Marlin City Lake (F); the most-stressed is New Marlin City Lake (F).
Quick Answers for Falls County
Planning a trip? Check special fishing regulations for New Marlin City Lake — or check the official Texas fishing regulations.
All Lakes in Falls County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | New Marlin City Lake | F | 1.5 ft | 130 µg/L |
Other Counties in Texas
See how Falls 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 Falls County
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Source: EPA National Aquatic Resource Surveys, 2026.