King Brook Reservoir
Hillsborough County, New Hampshire65 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 7 ft max depth
King Brook Reservoir in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 7 ft. Surface area: 65 acres.
King Brook Reservoir is a 65-acre lake in Hillsborough County, New Hampshire with a maximum depth of 7 feet.
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. King Brook Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether King Brook Reservoir is safe to swim in today is a call for the New Hampshire Department of Environmental Services and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for King Brook Reservoir
These are the measurements NHDES publishes for King Brook Reservoir, 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 King Brook Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
7 ft
Surface area
65 acres
Shoreline
1.9 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing King Brook Reservoir
EPA Impairment Status
King Brook Reservoir 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: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHIMP700060902-05 · Official waterbody report
Nearby Lakes in Hillsborough County
Frequently asked questions about King Brook Reservoir
Where is King Brook Reservoir?
- King Brook Reservoir is a lake in Hillsborough County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of King Brook Reservoir?
- King Brook Reservoir in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 7 ft. Surface area: 65 acres.
Is King Brook Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. King Brook Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is King Brook Reservoir?
- King Brook Reservoir has a maximum depth of 7 feet. The lake covers 65 acres.
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Where this data comes from
Measurements for King Brook Reservoir 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