Where is Lake Theriot?

Lake Theriot is a lake in Terrebonne County, Louisiana. Its water-quality measurements are published by LDEQ and shown on this page as reported.

Lake Theriot

Terrebonne County, Louisiana1,443 acresView map Directions

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

Area

1,443 acres

Surface area

Impaired · Oxygen depletion (low DO)

See the measurements Directions Where to stay

Lake Theriot in Terrebonne County, Louisiana has water-quality measurements published by LDEQ, shown here as reported. Surface area: 1443 acres.

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Lake Theriot is a 1,443-acre lake in Terrebonne County, Louisiana.

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

What Lake Theriot is good for

From access and monitoring records, not editorial picks.

Big water1,443 acres

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Lake Theriot is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), turbidity. Check local advisories before you swim.

Whether Lake Theriot 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.

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Water quality measurements for Lake Theriot

These are the measurements LDEQ publishes for Lake Theriot, 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 Lake Theriot

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

Lake Details

Surface area

1,443 acres

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

Stays via Stay22

Stays near Lake Theriot

Compare lakeside cabins, hotels, and vacation rentals near Lake Theriot in Terrebonne County, Louisiana — 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.

Top-rated places to stay near Lake Theriot

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Fishing Lake Theriot

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

EPA Impairment Status

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

Causes of impairment

Oxygen depletion (low DO)Turbidity

Designated uses not supporting: Aquatic life.

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

Source: EPA ATTAINS assessment unit LA120405_00 · Official waterbody report

Nearby Lakes in Terrebonne County

Lake Hatch3.9 miView →Lake De Cade5.1 miView →Jug Lake9.3 miView →Bayou la Loutre9.4 miView →Lake Hackberry9.7 miView →Raccourci Bay10.7 miView →

Frequently asked questions about Lake Theriot

Where is Lake Theriot?: Lake Theriot is a lake in Terrebonne County, Louisiana. Its water-quality measurements are published by LDEQ and shown on this page as reported.
What is the water quality of Lake Theriot?: Lake Theriot in Terrebonne County, Louisiana has water-quality measurements published by LDEQ, shown here as reported. Surface area: 1443 acres.
Is Lake Theriot safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Theriot is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), turbidity. Check local advisories before you swim.