Saint Marys Lake
Barnes County, North Dakota76 acresView mapDirections
No nutrient or algae sampling on record from ND DEQ for this lake.
- 15 ft max depth
Saint Marys Lake in Barnes County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Maximum depth: 15.3 ft. Surface area: 76 acres.
Saint Marys Lake is a 76-acre lake in Barnes County, North Dakota with a maximum depth of 15 feet (10-foot average).
Source: EPA Water Quality Portal sampling records, NDDEQ. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Saint Marys Lake is safe to swim in today is a call for the North Dakota Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Saint Marys Lake
These are the measurements ND DEQ publishes for Saint Marys Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Saint Marys Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
15.3 ft
Average depth
9.8 ft
Surface area
76 acres
Shoreline
2.2 mi
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Fishing Saint Marys Lake
Nearby Lakes in Barnes County
Frequently asked questions about Saint Marys Lake
Where is Saint Marys Lake?
- Saint Marys Lake is a lake in Barnes County, North Dakota. Its water-quality measurements are published by ND DEQ and shown on this page as reported.
What is the water quality of Saint Marys Lake?
- Saint Marys Lake in Barnes County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Maximum depth: 15.3 ft. Surface area: 76 acres.
Is Saint Marys Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Saint Marys Lake?
- Saint Marys Lake has a maximum depth of 15.3 feet and an average depth of 9.8 feet. The lake covers 76 acres.
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Where this data comes from
Measurements for Saint Marys Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Depth, fish, and access data from North Dakota Game & Fish