Lake Winona-North Cove East
Belknap County, New Hampshire93 acresView mapDirections
NHDES publishes the water-quality measurements for Lake Winona-North Cove East. Here is what has been measured.
- Impaired · Biotoxins
- Public access
- Limited data
Lake Winona-North Cove East in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 9.6 µg/L. Surface area: 93 acres.
Lake Winona-North Cove East is a 93-acre lake in Belknap County, New Hampshire. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-08-31. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Lake Winona-North Cove East is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
Whether Lake Winona-North Cove East 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 Lake Winona-North Cove East
These are the measurements NHDES publishes for Lake Winona-North Cove East, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 9.6 µg/L. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 9.6µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 37 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lake Winona-North Cove East
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
93 acres
Public access
Yes
Listed by NHDES
No bathymetric survey has been published for Lake Winona-North Cove East, so its depth is not documented here.
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Fishing Lake Winona-North Cove East
Reservoir Info (USACE NID)
Lake Winona-North Cove East is a man-made reservoir impounded by the Hawkins Pond Dam (completed 1873), built primarily for recreation on the Hawkins Pond Brook; earth-type dam, 12 ft tall and 100 ft long.
- Surface area
- 93 ac
- Normal storage
- 350 ac-ft
- Max storage
- 370 ac-ft
- Drainage area
- 1.7 sq mi
- Hazard class
- Significant
- Owner
- NH DES WATER DIVISION
Source: USACE National Inventory of Dams, NID ID NH00334 · Operator website · Matched by proximity (0.84 km)
EPA Impairment Status
Lake Winona-North Cove East 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, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700020108-02-02 · Official waterbody report
Nearby Lakes in Belknap County
Frequently asked questions about Lake Winona-North Cove East
Where is Lake Winona-North Cove East?
- Lake Winona-North Cove East is a lake in Belknap County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Lake Winona-North Cove East?
- Lake Winona-North Cove East in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 9.6 µg/L. Surface area: 93 acres.
Is Lake Winona-North Cove East safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Winona-North Cove East is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
Can I fish at Lake Winona-North Cove East?
- Public access to Lake Winona-North Cove East is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by New Hampshire's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
1 measurement from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133001 sample · 2020
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database