Lower Sister Lake
Hamilton County, New York147 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- Impaired · Mercury
- 13 ft max depth
Lower Sister Lake in Hamilton County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 13.1 ft. Surface area: 147 acres.
Lower Sister Lake is a 147-acre lake in Hamilton County, New York with a maximum depth of 13 feet (7-foot average).
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Lower Sister Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
Whether Lower Sister Lake is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lower Sister Lake
These are the measurements NY DEC publishes for Lower Sister 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 Lower Sister Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
13.1 ft
Average depth
6.6 ft
Surface area
147 acres
Shoreline
4.5 mi
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Fishing Lower Sister Lake
EPA Impairment Status
Lower Sister Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NY0801-0004 · Official waterbody report
Nearby Lakes in Hamilton County
Frequently asked questions about Lower Sister Lake
Where is Lower Sister Lake?
- Lower Sister Lake is a lake in Hamilton County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of Lower Sister Lake?
- Lower Sister Lake in Hamilton County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 13.1 ft. Surface area: 147 acres.
Is Lower Sister Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lower Sister Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
How deep is Lower Sister Lake?
- Lower Sister Lake has a maximum depth of 13.1 feet and an average depth of 6.6 feet. The lake covers 147 acres.
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Where this data comes from
Measurements for Lower Sister 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