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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water
NR

Towner County Lake Quality

North Dakota, 9 lakes — no lake here has enough monitoring data for a grade

Towner County holds 9 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. No lake in Towner County has enough sampling behind it for an A–F grade yet. The 9 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.

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.

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Where to stay near Towner County

Top-rated places to stay near Towner County

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Quick Answers for Towner County

Cleanest lakes in Towner County →Cleanest lakes in North Dakota →Safest swimming lakes in North Dakota →

Planning a trip? Check special fishing regulations for Bisbee-Big Coulee Dam Lake — or check the official North Dakota fishing regulations.

All Lakes in Towner County

9 lakes · 0 graded, 9 not rated0 graded lakes · 9 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
NRBisbee-Big Coulee Dam LakeTownerNR8 ftNo recent samplesNo recent samplesNo recent samples✓ Public
NRArmourdale Dam LakeTownerNR7.2 ftNo recent samplesNo recent samplesNo recent samples✓ Public
NRMcLaughlin LakeTownerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPound LakeTownerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMoore LakeTownerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRock LakeTownerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRock LakeTownerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSnyder LakeTownerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBrumba PoolTownerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot 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

Rolette County

80 lakes · Avg grade B

Renville County

2 lakes · Avg grade B

Bottineau County

47 lakes · Avg grade B

Benson County

31 lakes · Avg grade B

McLean County

43 lakes · Avg grade B

Barnes County

22 lakes · Avg grade C

See how Towner 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.