Where is Cocolalla Lake?

Cocolalla Lake is a lake in Bonner County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.

Cocolalla Lake

Bonner County, Idaho815 acresView map Directions

No nutrient or algae sampling on record from Idaho DEQ for this lake.

Area

815 acres

Surface area

Shoreline

6.1 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)

See the measurements Directions Where to stay

Cocolalla Lake in Bonner County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 815 acres.

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Cocolalla Lake is a 815-acre lake in Bonner County, Idaho.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Cocolalla Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.

Whether Cocolalla Lake is safe to swim in today is a call for the Idaho Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Cocolalla Lake

These are the measurements Idaho DEQ publishes for Cocolalla 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.

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

Lake Details

Surface area

815 acres

Shoreline

6.1 mi

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

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Stays near Cocolalla Lake

Compare lakeside cabins, hotels, and vacation rentals near Cocolalla Lake in Bonner County, Idaho — 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 Cocolalla Lake

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

EPA Impairment Status

Cocolalla Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).

Causes of impairment

Nutrients (phosphorus, nitrogen)Oxygen depletion (low DO)

Designated uses not supporting: Aquatic life.

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

Source: EPA ATTAINS assessment unit ID17010214PN013L_0L · Official waterbody report

Nearby Lakes in Bonner County

Round Lake2.7 miView →Jewel Lake4.7 miView →Mirror Lake6.1 miView →Muskrat Lake8.8 miView →Hoodoo Lake10.5 miView →Beaver Lake11 miView →

Frequently asked questions about Cocolalla Lake

Where is Cocolalla Lake?: Cocolalla Lake is a lake in Bonner County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Cocolalla Lake?: Cocolalla Lake in Bonner County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 815 acres.
Is Cocolalla Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Cocolalla Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.