Piyas Lake is a lake in Marshall County, South Dakota. Its water-quality measurements are published by SD DANR and shown on this page as reported.

How deep is Piyas Lake?

Piyas Lake has a maximum depth of 13 feet. The lake covers 1155 acres.

Piyas Lake

Marshall County, South Dakota1,155 acresView map Directions

No nutrient or algae sampling on record from SD DANR for this lake.

Max depth

13 ft

Bathymetric survey

Area

1,155 acres

Surface area

Shoreline

10.6 mi

Measured length

Impaired · Mercury
13 ft max depth

See the measurements Directions Where to stay

Piyas Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Maximum depth: 13 ft. Surface area: 1155 acres.

Loading map…

Piyas Lake is a 1,155-acre lake in Marshall County, South Dakota with a maximum depth of 13 feet.

Source: EPA Water Quality Portal sampling records, SD DANR. Methodology: how these readings are compared.

What Piyas Lake is good for

From access and monitoring records, not editorial picks.

Big water1,155 acres

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Piyas Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.

Whether Piyas Lake is safe to swim in today is a call for the South Dakota Department of Agriculture and Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Compare swimming lakes near Fargo →

Get alerts for Piyas Lake →

Water quality measurements for Piyas Lake

These are the measurements SD DANR publishes for Piyas 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 Piyas Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

13 ft

Surface area

1,155 acres

Shoreline

10.6 mi

Stays via Stay22

Stays near Piyas Lake

Compare lakeside cabins, hotels, and vacation rentals near Piyas Lake in Marshall County, South Dakota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Piyas Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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 whole trip? See where to stay at South Dakota’s top lakes →

Follow Piyas Lake’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Piyas Lake

→ Piyas Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Piyas Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit SD-JA-L-PIYAS_01 · Official waterbody report

Nearby Lakes in Marshall County

Buffalo Lakes3.2 miView →Lake Isabella3.9 miView →Almos Lake3.8 miView →Josephine Lake4.9 miView →Stink Lakes5.2 miView →South Red Iron Lake6.2 miView →

Frequently asked questions about Piyas Lake

Where is Piyas Lake?: Piyas Lake is a lake in Marshall County, South Dakota. Its water-quality measurements are published by SD DANR and shown on this page as reported.
What is the water quality of Piyas Lake?: Piyas Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Maximum depth: 13 ft. Surface area: 1155 acres.
Is Piyas Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Piyas Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Piyas Lake?: Piyas Lake has a maximum depth of 13 feet. The lake covers 1155 acres.