Cow Island Lake
St. Martin County, Louisiana625 acresView mapDirections
No nutrient or algae sampling on record from LDEQ for this lake.
Cow Island Lake in St. Martin County, Louisiana has water-quality measurements published by LDEQ, shown here as reported. Surface area: 625 acres.
Cow Island Lake is a 625-acre lake in St. Martin County, Louisiana.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Cow Island Lake is safe to swim in today is a call for the Louisiana Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Cow Island Lake
These are the measurements LDEQ publishes for Cow Island 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
625 acres
Shoreline
8.6 mi
No bathymetric survey has been published for Cow Island Lake, so its depth is not documented here.
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Stays near Cow Island Lake
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Frequently asked questions about Cow Island Lake
Where is Cow Island Lake?
- Cow Island Lake is a lake in St. Martin County, Louisiana. Its water-quality measurements are published by LDEQ and shown on this page as reported.
What is the water quality of Cow Island Lake?
- Cow Island Lake in St. Martin County, Louisiana has water-quality measurements published by LDEQ, shown here as reported. Surface area: 625 acres.
Is Cow Island Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Cow Island Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.