Block Lake
Otter Tail County, Minnesota288 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 23 ft max depth
- Public access
Block Lake in Otter Tail County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 23 ft. Surface area: 288 acres.
Block Lake is a 288-acre lake in Otter Tail County, Minnesota with a maximum depth of 23 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder. Methodology: how these readings are compared.
What Block Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Block Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Block 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.
Water quality measurements for Block Lake
These are the measurements Minnesota PCA publishes for Block 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 Block Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
23 ft
Surface area
288 acres
Shoreline
3.3 mi
Public access
Yes
Listed by Minnesota PCA
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
Recreation & Access
- Block LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Block Lake
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Fishing Block Lake
EPA Impairment Status
Block Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN56-0079-00 · Official waterbody report
Nearby Lakes in Otter Tail County
Frequently asked questions about Block Lake
Where is Block Lake?
- Block Lake is a lake in Otter Tail County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Block Lake?
- Block Lake in Otter Tail County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 23 ft. Surface area: 288 acres.
Is Block Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Block 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 Block Lake?
- Block Lake has a maximum depth of 23 feet. The lake covers 288 acres.
Are there boat ramps on Block Lake?
- Block Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Block Lake. Public access is listed as yes.
Can I fish at Block Lake?
- Block Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
Measurements for Block Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory