Renville County Lake Quality
North Dakota, 3 lakes, average grade C (Fair)
Renville County has 3 graded 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. Renville County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
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 Lake Darling (B); the most-stressed is Lake Darling (C).
Quick Answers for Renville County
Planning a trip? Check special fishing regulations for Lake Darling, whether the fish are safe to eat, and the best times to fish — or check the official North Dakota fishing regulations.
Fishing in Renville County
All Lakes in Renville County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Lake Darling | B | 4.9 ft | 28.7 ft | - |
| 2 | Lake Darling | B | 9.8 ft | 28.7 ft | - |
| 3 | Lake Darling | C | 5.4 ft | 28.7 ft | - |
Other Counties in North Dakota
See how Renville County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
Where to stay near Renville County
Top-rated places to stay near Renville County
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Source: EPA National Aquatic Resource Surveys, 2026.