Griggs County Lake Quality
North Dakota, 2 lakes, average grade C (Fair)
Only 2 lakes in Griggs 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. Griggs 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 Carlson-Tande Dam Lake (C); the most-stressed is Carlson-Tande Dam Lake (C).
Quick Answers for Griggs County
Planning a trip? Check special fishing regulations for Carlson-Tande Dam Lake, whether the fish are safe to eat, and the best times to fish — or check the official North Dakota fishing regulations.
Fishing in Griggs County
All Lakes in Griggs County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Carlson-Tande Dam Lake | C | 5.6 ft | 23 ft | - |
| 2 | Red Willow Lake | C | 6.4 ft | 23.5 ft | - |
Other Counties in North Dakota
See how Griggs 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 Griggs County
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Source: EPA National Aquatic Resource Surveys, 2026.