Sargent County Lake Quality
North Dakota, 3 lakes, average grade D (Poor)
Sargent 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. On average, Sargent 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 Silver Lake (C); the most-stressed is Sprague Lake (F).
Quick Answers for Sargent County
Planning a trip? Check special fishing regulations for Silver Lake, whether the fish are safe to eat, and the best times to fish — or check the official North Dakota fishing regulations.
Fishing in Sargent County
All Lakes in Sargent County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Silver Lake | C | 5.9 ft | 29 ft | - |
| 2 | Alkali Lake | C | 4.6 ft | 21.9 ft | - |
| 3 | Sprague Lake | F | 1.6 ft | 9.5 ft | - |
Other Counties in North Dakota
See how Sargent 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 Sargent County
Top-rated places to stay near Sargent County
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Source: EPA National Aquatic Resource Surveys, 2026.