Where is Antelope Lake?

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

Antelope Lake

Day County, South Dakota574 acresView map Directions

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

Area

574 acres

Surface area

Impaired · Mercury

See the measurements Directions Where to stay

Antelope Lake in Day County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 574 acres.

Loading map…

Antelope Lake is a 574-acre lake in Day County, South Dakota.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Antelope Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Antelope 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 Alexandria →

Get alerts for Antelope Lake →

Water quality measurements for Antelope Lake

These are the measurements SD DANR publishes for Antelope 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 Antelope Lake

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

Lake Details

Surface area

574 acres

No bathymetric survey has been published for Antelope Lake, so its depth is not documented here.

Stays via Stay22

Stays near Antelope Lake

Compare lakeside cabins, hotels, and vacation rentals near Antelope Lake in Day 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 Antelope 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 Antelope Lake’s readings

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

Or email

Fishing Antelope Lake

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

EPA Impairment Status

Antelope Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

Designated uses not supporting: Aquatic life.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit SD-BS-L-ANTELOPE_01 · Official waterbody report

Nearby Lakes in Day County

Solomon Slough3.7 miView →South Waubay Lake6.6 miView →Buchner Slough5.4 miView →Rush Lake7 miView →Goose Lake7.5 miView →Little Rush Lake7.6 miView →

Frequently asked questions about Antelope Lake

Where is Antelope Lake?: Antelope Lake is a lake in Day 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 Antelope Lake?: Antelope Lake in Day County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 574 acres.
Is Antelope Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Antelope Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.