Where is School Lake?

School Lake is a lake in Chisago County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.

How deep is School Lake?

School Lake has a maximum depth of 19.7 feet and an average depth of 9.8 feet. The lake covers 47 acres.

School Lake

Chisago County, Minnesota47 acresView map Directions

No nutrient or algae sampling on record from Minnesota PCA for this lake.

Max depth

19.7 ft

Bathymetric survey

Area

47 acres

Surface area

Shoreline

1.4 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
20 ft max depth

See the measurements Directions Where to stay

School Lake in Chisago County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 19.7 ft. Surface area: 47 acres.

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School Lake is a 47-acre lake in Chisago County, Minnesota with a maximum depth of 20 feet (10-foot average).

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

Swimming conditions

No reading

Recreation use not supported

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

Whether School Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for School Lake

These are the measurements Minnesota PCA publishes for School 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

Max depth

19.7 ft

Average depth

9.8 ft

Surface area

47 acres

Shoreline

1.4 mi

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Stays near School Lake

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Fishing School Lake

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

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Recreation.

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

Source: EPA ATTAINS assessment unit MN13-0057-00 · Official waterbody report

Nearby Lakes in Chisago County

Birch Lake0.8 miView →Little Comfort Lake5.6 ft clear · Eutrophic1.4 miView →Comfort Lake6 ft clear · Eutrophic2.1 miView →School Lake7.9 ft clear · Mesotrophic—View →Moody Lake4 ft clear · Eutrophic2.2 miView →White Stone Lake—View →

Frequently asked questions about School Lake

Where is School Lake?: School Lake is a lake in Chisago County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of School Lake?: School Lake in Chisago County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 19.7 ft. Surface area: 47 acres.
Is School Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. School Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is School Lake?: School Lake has a maximum depth of 19.7 feet and an average depth of 9.8 feet. The lake covers 47 acres.