Where is East Twin Lake?

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

East Twin Lake

Hancock County, Iowa222 acresView map Directions

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

Area

222 acres

Surface area

Shoreline

3.3 mi

Measured length

Impaired · Algal growth

See the measurements Directions Where to stay

East Twin Lake in Hancock County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Surface area: 222 acres.

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East Twin Lake is a 222-acre lake in Hancock 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. East Twin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, turbidity. Check local advisories before you swim.

Whether East Twin 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 East Twin Lake

These are the measurements Iowa DNR publishes for East Twin 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 East Twin Lake

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

Lake Details

Surface area

222 acres

Shoreline

3.3 mi

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

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Stays near East Twin Lake

Compare lakeside cabins, hotels, and vacation rentals near East Twin Lake in Hancock 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 East Twin Lake

→ East Twin Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

Algal growthTurbidity

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit IA 02-IOW-777 · Official waterbody report

Nearby Lakes in Hancock County

West Twin Lake1.1 miView →Eldred Sherwood Lake3 ft clear · Hypereutrophic7.4 miView →Eagle Lake13.1 miView →Crystal Lake Max Depth1.6 ft clear · Hypereutrophic—View →Lake George—View →

Frequently asked questions about East Twin Lake

Where is East Twin Lake?: East Twin Lake is a lake in Hancock County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.
What is the water quality of East Twin Lake?: East Twin Lake in Hancock County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Surface area: 222 acres.
Is East Twin Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. East Twin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, turbidity. Check local advisories before you swim.