Halls Pond
Halls Pond in Windham County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.1 ft visibility. Surface area: 82 acres.
- Clarity
- 8.1 ft
- Area
- 82 acres
Why Halls Pond 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 Halls Pond, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
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.
Halls Pond is a 82-acre lake in Windham County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-07-19. 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 Halls Pond
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 8.1 ft. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.1 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Halls Pond
Compare lakeside cabins, hotels, and vacation rentals near Halls Pond 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 Halls Pond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 82 acres |
No bathymetric survey has been published for Halls Pond, so its depth is not documented here.
Fishing Halls Pond
Reservoir Info (USACE NID)
Halls Pond is a man-made reservoir impounded by the Halls Pond Dike (completed 1900), built primarily for recreation on the Reed Brook; earth-type dam, 10 ft tall and 330 ft long.
- Surface area
- 82 ac
- Normal storage
- 890 ac-ft
- Max storage
- 779 ac-ft
- Drainage area
- 1.23 sq mi
- Hazard class
- Significant
- Owner
- Connecticut DEEP
Source: USACE National Inventory of Dams, NID ID CT00598 · Operator website
Graded lakes near Halls Pond
Halls Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Windham County
Frequently asked questions about Halls Pond
Where is Halls Pond?
- Halls Pond 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 Halls Pond?
- Halls Pond in Windham County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.1 ft visibility. Surface area: 82 acres.
Is Halls Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Halls Pond is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Halls Pond across LakeGrade
More Connecticut Lake Rankings
Other Lakes in Connecticut
Mesotrophic Lakes in Connecticut
Where this data comes from
1 measurement from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 2020
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.