Mineral County Lake Quality
Nevada, 3 lakes, average grade D (Nutrient-rich)
Mineral County has 3 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. 1 of those lake carry an A–F grade. The county-level summary describes that subset, not every water body listed. On average, Mineral County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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 Walker Lake (D); the most-stressed is Walker Lake (D).
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Quick Answers for Mineral County
Planning a trip? Check special fishing regulations for Walker Lake — or check the official Nevada fishing regulations.
All Lakes in Mineral County
3 lakes · 1 graded, 2 not rated1 graded lake · 2 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | DWalker LakeMineral | D | 4.7 ft | 629.5 µg/L | 13.4 µg/L | No recent samples | Not recorded |
| NRAlkali LakeMineral | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRWeber ReservoirMineral | 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.
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Other Counties in Nevada
See how Mineral 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.