Wononscopomuc Lake
Wononscopomuc Lake in Litchfield County, Connecticut has a water quality grade of C (Fair). Phosphorus: 17 µg/L. Chlorophyll-a (algae): 1.9 µg/L. Surface area: 2 acres.
- Area
- 2 acres
- Type
- Oligotrophic
Wononscopomuc Lake is a 2-acre cold, clear oligotrophic lake in Litchfield County, Connecticut. Water quality is graded C based on 3 sampling years through 2024. Compared to the 11 other monitored lakes in Litchfield County, Wononscopomuc Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-11-18. Grade methodology: LakeGrade methodology.
Watch Wononscopomuc Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyModerate
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
No clarity data. Phosphorus level: 17 µg/L. Chlorophyll-a: 1.9 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 17 µg/L | Fair |
| Chlorophyll-a (Algae) | 1.9 µg/L | Good |
| Trophic State Index (TSI) | 41 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Wononscopomuc Lake
Compare lakeside cabins, hotels, and vacation rentals near Wononscopomuc Lake in Litchfield County, Connecticut — 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 Wononscopomuc Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2 acres |
No bathymetric survey has been published for Wononscopomuc Lake, so its depth is not documented here.
Fishing Wononscopomuc Lake
Reservoir Info (USACE NID)
Wononscopomuc Lake is a man-made reservoir impounded by the Holly Pond Dam, built primarily for recreation on the Factory Brook; earth-type dam, 4 ft tall and 40 ft long.
- Surface area
- 2 ac
- Normal storage
- 0 ac-ft
- Drainage area
- 2.8 sq mi
- Hazard class
- Significant
- Owner
- Town of Salisbury
Source: USACE National Inventory of Dams, NID ID CT01258 · Operator website · Matched by proximity (0.95 km)
County Ranking
Ranked #7 of 12 lakes in Litchfield County
Nearby Lakes in Litchfield County
Frequently asked questions about Wononscopomuc Lake
Where is Wononscopomuc Lake?
- Wononscopomuc Lake is a lake in Litchfield County, Connecticut. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Wononscopomuc Lake?
- Wononscopomuc Lake in Litchfield County, Connecticut has a water quality grade of C (Fair). Phosphorus: 17 µg/L. Chlorophyll-a (algae): 1.9 µg/L. Surface area: 2 acres.
Is Wononscopomuc Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Wononscopomuc Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 1.9 µg/L. Always check local health department advisories before swimming.
Explore Wononscopomuc Lake across LakeGrade
More Connecticut Lake Rankings
Other Grade C Lakes in Connecticut
Oligotrophic Lakes in Connecticut
Where this data comes from
171 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX171 samples · 2020–2024
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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.