Annabessacook Lake
Kennebec County, Maine1,416 acresView mapDirections
No nutrient or algae sampling on record from Maine DEP for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
- 49 ft max depth
Annabessacook Lake in Kennebec County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Maximum depth: 49.2 ft. Surface area: 1416 acres.
Annabessacook Lake is a 1,416-acre lake in Kennebec County, Maine with a maximum depth of 49 feet (21-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Annabessacook Lake is good for
From access and monitoring records, not editorial picks.
- Deep water49.2 ft surveyed max depth
- Big water1,416 acres
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Annabessacook Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
Whether Annabessacook Lake is safe to swim in today is a call for the Maine Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Annabessacook Lake
These are the measurements Maine DEP publishes for Annabessacook 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 Annabessacook Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
49.2 ft
Average depth
21 ft
Surface area
1,416 acres
Shoreline
15.6 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Annabessacook Lake
EPA Impairment Status
Annabessacook 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: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit ME0103000311_9961L · Official waterbody report
Nearby Lakes in Kennebec County
Frequently asked questions about Annabessacook Lake
Where is Annabessacook Lake?
- Annabessacook Lake is a lake in Kennebec County, Maine. Its water-quality measurements are published by Maine DEP and shown on this page as reported.
What is the water quality of Annabessacook Lake?
- Annabessacook Lake in Kennebec County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Maximum depth: 49.2 ft. Surface area: 1416 acres.
Is Annabessacook Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Annabessacook Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
How deep is Annabessacook Lake?
- Annabessacook Lake has a maximum depth of 49.2 feet and an average depth of 21 feet. The lake covers 1416 acres.
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Where this data comes from
Measurements for Annabessacook 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