Cavalier County Lake Quality
North Dakota, 1 lakes, average grade B (Good)
Only 1 lakes in Cavalier 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-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Mt Carmel Dam Lake (B) is the cleanest in the county.
Quick Answers for Cavalier County
Planning a trip? Check special fishing regulations for Mt Carmel 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 Cavalier County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Mt Carmel Dam Lake | B | 7.9 ft | 31.2 ft | - |
Other Counties in North Dakota
See how Cavalier 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 Cavalier County
Top-rated places to stay near Cavalier County
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Cavalier County?
Get lake water-quality report cards plus the best cabin & lodging deals near Cavalier County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.