Lincoln County Lake Quality
Oregon, 4 lakes, average grade D (Nutrient-rich)
Lincoln County holds 4 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 1 of those lake carry an A–F grade. The county-level summary describes that subset, not every water body listed. On average, Lincoln 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 Devil'S Lake (D); the most-stressed is Devil'S Lake (D).
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Quick Answers for Lincoln County
Planning a trip? Check special fishing regulations for Devil'S Lake — or check the official Oregon fishing regulations.
All Lakes in Lincoln County
4 lakes · 1 graded, 3 not rated1 graded lake · 3 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | DDevil'S LakeLincoln | D | No recent samples | No recent samples | 15.6 µg/L | No recent samples | ✓ Public |
| NREckman LakeLincoln | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NROlalla ReservoirLincoln | NR | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRNewport ReservoirLincoln | 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 Oregon
See how Lincoln 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.