Tobey Pond
Litchfield County, Connecticut54 acresView mapDirections
CT DEEP publishes the water-quality measurements for Tobey Pond. Here is what has been measured.
- Oligotrophic
- Limited data
Tobey Pond in Litchfield County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 0.5 µg/L. Surface area: 53.6 acres.
Tobey Pond is a 54-acre cold, clear oligotrophic lake in Litchfield County, Connecticut. Compared to the 11 other monitored lakes in Litchfield County, Tobey Pond ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-08-22. 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 Tobey Pond 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 Tobey Pond
These are the measurements CT DEEP publishes for Tobey Pond, 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 8 µg/L. Chlorophyll-a 0.5 µg/L. TSI 29.
| 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 | 8µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 0.5µg/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. | 29 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Tobey Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
54 acres
No bathymetric survey has been published for Tobey Pond, so its depth is not documented here.
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Fishing Tobey Pond
Reservoir Info (USACE NID)
Tobey Pond is a man-made reservoir impounded by the Tobey Pond Dam (completed 1870), built primarily for recreation on the Tobey Pond Brook; earth-type dam, 12 ft tall and 195 ft long.
- Surface area
- 53.6 ac
- Normal storage
- 239 ac-ft
- Max storage
- 239 ac-ft
- Drainage area
- 1.04 sq mi
- Hazard class
- Significant
- Owner
- Childs
Source: USACE National Inventory of Dams, NID ID CT00449 · Operator website
Nearby Lakes in Litchfield County
Frequently asked questions about Tobey Pond
Where is Tobey Pond?
- Tobey Pond 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 Tobey Pond?
- Tobey Pond in Litchfield County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 0.5 µg/L. Surface area: 53.6 acres.
Is Tobey Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Tobey Pond across LakeQuality
More lakes in Connecticut
Other Lakes in Connecticut
Oligotrophic Lakes in Connecticut
Where this data comes from
27 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_WQX27 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.