Zavala County Lake Quality
Texas, 5 lakes — no lake here has enough monitoring data for a grade
Zavala County has 5 monitored 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. No lake in Zavala County has enough sampling behind it for an A–F grade yet. The 5 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.
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.
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Quick Answers for Zavala County
Planning a trip? Check special fishing regulations for Lake Averhoff Upstream Tpwd Ramp — or check the official Texas fishing regulations.
All Lakes in Zavala County
5 lakes · 0 graded, 5 not rated0 graded lakes · 5 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRLake Averhoff Upstream Tpwd RampZavala | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRComanche LakeZavala | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRCometa TankZavala | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRCounty Line TankZavala | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRTwin TankZavala | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
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Other Counties in Texas
See how Zavala County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.