
Baker County Lake Quality
Oregon, 13 lakes, average grade D (Nutrient-rich)
Baker County holds 13 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 3 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. On average, Baker 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. Unity Reservoir (D) is the cleanest in the county.
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Quick Answers for Baker County
Planning a trip? Check special fishing regulations for Unity Reservoir — or check the official Oregon fishing regulations.
All Lakes in Baker County
13 lakes · 3 graded, 10 not rated3 graded lakes · 10 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | DUnity ReservoirBaker | D | No recent samples | No recent samples | 17.8 µg/L | No recent samples | ✓ Public |
| 2 | DPhillps LakeBaker | D | No recent samples | No recent samples | 10.2 µg/L | No recent samples | ✓ Public |
| 3 | FBrownlee ReservoirBaker | F | No recent samples | No recent samples | 108 µg/L | No recent samples | ✓ Public |
| NRPhillips LakeBaker | NR | 5.9 ft | 17.5 µg/L | 2.1 µg/L | No recent samples | ✓ Public | |
| NRWhited ReservoirBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRClear Creek ReservoirBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRFish LakeBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRBalm Creek ReservoirBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRSmith LakeBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLove ReservoirBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRHiggins ReservoirBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRElms ReservoirBaker | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRBrownlee ReservoirBaker | 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 Baker 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.