Pembina County Lake Quality
North Dakota, 1 lakes, average grade C (Fair)
Only 1 lakes in Pembina County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
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 Renwick Dam Lake (C); the most-stressed is Renwick Dam Lake (C).
Quick Answers for Pembina County
Planning a trip? Check special fishing regulations for Renwick Dam Lake, whether the fish are safe to eat, and the best times to fish — or check the official North Dakota fishing regulations.
All Lakes in Pembina County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Renwick Dam Lake | C | 3 ft | 16.3 ft | - |
Other Counties in North Dakota
See how Pembina County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
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Source: EPA National Aquatic Resource Surveys, 2026.