Hettinger County Lake Quality
North Dakota, 6 lakes, average grade D (Nutrient-rich)
Hettinger County holds 6 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. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 0 lakes fall into the F bracket outright.
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 Indian Creek Dam Lake (C); the most-stressed is Castle Rock Dam Lake (D).
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Quick Answers for Hettinger County
Planning a trip? Check special fishing regulations for Indian Creek Dam Lake — or check the official North Dakota fishing regulations.
All Lakes in Hettinger County
6 lakes · 3 graded, 3 not rated3 graded lakes · 3 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | CIndian Creek Dam LakeHettinger | C | 3.1 ft | 94 µg/L | 8.2 µg/L | No recent samples | ✓ Public |
| 2 | DCastle Rock Dam LakeHettinger | D | 3.8 ft | 148 µg/L | 24.3 µg/L | No recent samples | Not recorded |
| 3 | DLarson LakeHettinger | D | 4.8 ft | 613 µg/L | 13.1 µg/L | No recent samples | ✓ Public |
| NRJung LakeHettinger | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLarson LakeHettinger | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRDry LakeHettinger | 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 North Dakota
See how Hettinger 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.