Shadow Lake
Rockingham County, New Hampshire35 acresView mapDirections
No nutrient or algae sampling on record from NHDES for this lake.
- Impaired · Mercury
- 25 ft max depth
Shadow Lake in Rockingham County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 25 ft. Surface area: 35 acres.
Shadow Lake is a 35-acre lake in Rockingham County, New Hampshire with a maximum depth of 25 feet (14-foot average).
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. Shadow Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
Whether Shadow Lake 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 Shadow Lake
These are the measurements NHDES publishes for Shadow 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 Shadow Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
25 ft
Average depth
13.5 ft
Surface area
35 acres
Shoreline
1.3 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
Stays via Stay22
Stays near Shadow Lake
Compare lakeside cabins, hotels, and vacation rentals near Shadow Lake in Rockingham County, New Hampshire — 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 Shadow Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Shadow Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Shadow Lake
EPA Impairment Status
Shadow Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700061102-09-01 · Official waterbody report
Nearby Lakes in Rockingham County
Frequently asked questions about Shadow Lake
Where is Shadow Lake?
- Shadow Lake is a lake in Rockingham County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Shadow Lake?
- Shadow Lake in Rockingham County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Maximum depth: 25 ft. Surface area: 35 acres.
Is Shadow Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Shadow Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
How deep is Shadow Lake?
- Shadow Lake has a maximum depth of 25 feet and an average depth of 13.5 feet. The lake covers 35 acres.
Explore Shadow Lake across LakeQuality
More lakes in New Hampshire
Other Lakes in New Hampshire
Where this data comes from
Measurements for Shadow 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