Clear Lake is a lake in Pocahontas County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.

Clear Lake

Pocahontas County, Iowa163 acresView map Directions

No nutrient or algae sampling on record from Iowa DNR for this lake.

Area

163 acres

Surface area

Shoreline

3 mi

Measured length

Impaired · Oxygen depletion (low DO)

See the measurements Directions Where to stay

Clear Lake in Pocahontas County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Surface area: 163 acres.

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Clear Lake is a 163-acre lake in Pocahontas County, Iowa.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Clear Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.

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

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Water quality measurements for Clear Lake

These are the measurements Iowa DNR publishes for Clear 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 Clear Lake

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

Lake Details

Surface area

163 acres

Shoreline

3 mi

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

Stays via Stay22

Stays near Clear Lake

Compare lakeside cabins, hotels, and vacation rentals near Clear Lake in Pocahontas County, Iowa — 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.

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Fishing Clear Lake

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

EPA Impairment Status

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

Causes of impairment

Oxygen depletion (low DO)pH / acidity

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit IA 04-RAC-1176 · Official waterbody report

Nearby Lakes in Pocahontas County

Sunken Island Lake7 miView →Lizard Lake20.9 miView →Pickerel Lake12 miView →Newell Pit Lake4.1 ft clear · Eutrophic10.9 miView →Rush Lake14.8 miView →Gustafson Lake2.3 ft clear · Eutrophic16.3 miView →

Frequently asked questions about Clear Lake

Where is Clear Lake?: Clear Lake is a lake in Pocahontas County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.
What is the water quality of Clear Lake?: Clear Lake in Pocahontas County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Surface area: 163 acres.
Is Clear Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Clear Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.