What is the water quality grade for Hehn-Schaffer Lake?

Hehn-Schaffer Lake in Stutsman County, North Dakota received a water quality grade of C (Fair). Water clarity: 6.6 ft visibility. Chlorophyll-a (algae): 15.4 µg/L. Maximum depth: 26 ft. Surface area: 298 acres.

Is Hehn-Schaffer Lake safe to swim in?

Swim with caution, moderate algae may be present. Hehn-Schaffer Lake has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 15.4 µg/L. Always check local health department advisories before swimming.

How deep is Hehn-Schaffer Lake?

Hehn-Schaffer Lake has a maximum depth of 26 feet and an average depth of 11.1 feet. The lake covers 298 acres.

What fish are in Hehn-Schaffer Lake?

Fish species found in Hehn-Schaffer Lake include Northern Pike, Walleye, Yellow Perch. Hehn-Schaffer Lake is located in Stutsman County, North Dakota.

Stutsman County, North Dakota

Hehn-Schaffer Lake

Grade CFair · 6.6 ft clarity

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Eutrophic

Hehn-Schaffer Lake is a 298-acre productive, nutrient-rich eutrophic lake in Stutsman County, North Dakota with a maximum depth of 26 feet (11-foot average). Water quality is graded C based on 2 sampling years through 2021. The lake supports 3 documented fish species including Northern Pike, Walleye, and Yellow Perch. Public access is available with 1 public boat landing. Compared to the 6 other monitored lakes in Stutsman County, Hehn-Schaffer Lake ranks #5 for water quality.

Source: EPA Water Quality Portal sampling records, North Dakota DNR, last sampled 2021-10-08. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swim with caution, moderate algae may be present

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Water Quality Grade: C, Fair

Murky, only visible to about 6.6 ft. Chlorophyll-a: 15.4 µg/L. Trophic State Index: 54.

Metric	Value	Grade
Water Clarity (Secchi Depth)	6.6 ft	D
Phosphorus	No data
Chlorophyll-a (Algae)	15.4 µg/L	C
Trophic State Index (TSI)	54	Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

Characteristic	Value
Maximum Depth	26 ft
Average Depth	11.1 ft
Surface Area	298 acres
Shoreline Length	7.6 mi
Public Access	Yes

Where to stay near Hehn-Schaffer Lake

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Fish Species

Northern Pike Walleye Yellow Perch

Click a species to see every graded lake where it is documented.

Fishing Hehn-Schaffer Lake

Recreation & Access

Boat Landings

Yes

Public Access

Water Temperature

Hehn-Schaffer Lake averages about 60°F at the surface in summer, usually warmest in Aug (about 61°F) and coldest in May (about 45°F). These are typical values by month — not a live reading.