Lake Chaffee
Lake Chaffee in Windham County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 23 µg/L. Chlorophyll-a (algae): 3.7 µg/L. Surface area: 57.8 acres.
- Area
- 58 acres
Why Lake Chaffee has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Chaffee, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lake Chaffee
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 23 µg/L. Chlorophyll-a: 3.7 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 23 µg/L | Not graded |
| Chlorophyll-a (Algae) | 3.7 µg/L | Not graded |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Chaffee
Compare lakeside cabins, hotels, and vacation rentals near Lake Chaffee in Windham 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 Lake Chaffee
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 58 acres |
No bathymetric survey has been published for Lake Chaffee, so its depth is not documented here.
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
Graded lakes near Lake Chaffee
Lake Chaffee has no grade, but these lakes within a short drive do.
Nearby Lakes in Windham County
Frequently asked questions about Lake Chaffee
Where is Lake Chaffee?
- Lake Chaffee is a lake in Windham County, Connecticut. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Lake Chaffee?
- Lake Chaffee in Windham County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 23 µg/L. Chlorophyll-a (algae): 3.7 µg/L. Surface area: 57.8 acres.
Is Lake Chaffee safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Chaffee is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 3.7 µg/L. Always check local health department advisories before swimming.
Explore Lake Chaffee across LakeGrade
More Connecticut Lake Rankings
Other Lakes in Connecticut
Mesotrophic Lakes in Connecticut
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)
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.