Wononpakook Lake
Litchfield County, Connecticut171 acresView mapDirections
CT DEEP publishes the water-quality measurements for Wononpakook Lake. Here is what has been measured.
- Mesotrophic
- Limited data
Wononpakook Lake in Litchfield County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 15 µg/L. Chlorophyll-a (algae): 3.3 µg/L. Surface area: 171 acres.
Wononpakook Lake is a 171-acre mesotrophic lake in Litchfield County, Connecticut. Compared to the 11 other monitored lakes in Litchfield County, Wononpakook Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-07-18. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Wononpakook Lake is safe to swim in today is a call for the Connecticut Department of Energy and Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Wononpakook Lake
These are the measurements CT DEEP publishes for Wononpakook 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. Phosphorus 15 µg/L. Chlorophyll-a 3.3 µg/L. TSI 43.
| 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 | 15µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 3.3µg/L | Measured, not scored 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. | 43 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Wononpakook Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
171 acres
No bathymetric survey has been published for Wononpakook Lake, so its depth is not documented here.
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Fishing Wononpakook Lake
Reservoir Info (USACE NID)
Wononpakook Lake is a man-made reservoir impounded by the Wononpakook Lake Dam (completed 1920), built primarily for recreation on the Mudge Pond Bk Trib; earth-type dam, 10 ft tall and 670 ft long.
- Surface area
- 171 ac
- Normal storage
- 1,700 ac-ft
- Max storage
- 2,570 ac-ft
- Drainage area
- 4.41 sq mi
- Hazard class
- Significant
- Owner
- Town of Salisbury
Source: USACE National Inventory of Dams, NID ID CT00599 · Operator website
Nearby Lakes in Litchfield County
Frequently asked questions about Wononpakook Lake
Where is Wononpakook Lake?
- Wononpakook Lake is a lake in Litchfield County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Wononpakook Lake?
- Wononpakook Lake in Litchfield County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 15 µg/L. Chlorophyll-a (algae): 3.3 µg/L. Surface area: 171 acres.
Is Wononpakook Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Wononpakook Lake across LakeQuality
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Where this data comes from
14 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX14 samples · 2024
Analytical methods
- Total Phosphorus After Block Digestion
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- Nitrate-Nitrite Nitrogen by Colorimetry
- Turbidity by Nephelometry
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.