Lake Chaffee
Windham County, Connecticut58 acresView mapDirections
CT DEEP publishes the water-quality measurements for Lake Chaffee. Here is what has been measured.
- Limited data
Lake Chaffee in Windham County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 23 µg/L. Chlorophyll-a (algae): 3.7 µg/L. Surface area: 57.8 acres.
Lake Chaffee is a 58-acre lake in Windham County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-08-24. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Chaffee 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 Lake Chaffee
These are the measurements CT DEEP publishes for Lake Chaffee, 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 23 µg/L. Chlorophyll-a 3.7 µg/L. TSI 46.
| 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 | 23µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 3.7µg/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. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Chaffee
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Lake Details
Surface area
58 acres
No bathymetric survey has been published for Lake Chaffee, so its depth is not documented here.
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Fishing Lake Chaffee
Reservoir Info (USACE NID)
Lake Chaffee is a man-made reservoir impounded by the Lake Chaffee Dam (completed 1880), built primarily for recreation on the Mountt Hope River Trib; earth-type dam, 3 ft tall and 21 ft long.
- Surface area
- 57.8 ac
- Normal storage
- 412 ac-ft
- Max storage
- 412 ac-ft
- Drainage area
- 0.5 sq mi
- Hazard class
- Significant
- Owner
- Lake Chaffee Improvement Association;Richards
Source: USACE National Inventory of Dams, NID ID CT00466 · Operator website
Nearby Lakes in Windham County
Frequently asked questions about Lake Chaffee
Where is Lake Chaffee?
- Lake Chaffee is a lake in Windham County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Lake Chaffee?
- Lake Chaffee in Windham County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 23 µg/L. Chlorophyll-a (algae): 3.7 µg/L. Surface area: 57.8 acres.
Is Lake Chaffee safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Lake Chaffee across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX4 samples · 2022
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.