Pachaug Pond
Pachaug Pond in New London County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.3 ft visibility. Surface area: 830 acres.
- Clarity
- 10.3 ft
- Area
- 830 acres
Why Pachaug 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 Pachaug Pond, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. 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.
Pachaug Pond is a 830-acre lake in New London County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-08-31. 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 Pachaug Pond
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 10.3 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.3 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Pachaug Pond
Compare lakeside cabins, hotels, and vacation rentals near Pachaug Pond in New London 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 Pachaug Pond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 830 acres |
No bathymetric survey has been published for Pachaug Pond, so its depth is not documented here.
Fishing Pachaug Pond
Reservoir Info (USACE NID)
Pachaug Pond is a man-made reservoir impounded by the Pachaug Pond Dam (completed 1888), built primarily for fish and wildlife pond on the Pachaug River; earth-type dam, 17 ft tall and 770 ft long.
- Surface area
- 830 ac
- Normal storage
- 5,982 ac-ft
- Max storage
- 10,962 ac-ft
- Drainage area
- 52.3 sq mi
- Hazard class
- High
- Owner
- Connecticut DEEP
Source: USACE National Inventory of Dams, NID ID CT00663 · Operator website
Graded lakes near Pachaug Pond
Pachaug Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in New London County
Frequently asked questions about Pachaug Pond
Where is Pachaug Pond?
- Pachaug Pond is a lake in New London 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 Pachaug Pond?
- Pachaug Pond in New London County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.3 ft visibility. Surface area: 830 acres.
Is Pachaug Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Pachaug 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 Pachaug Pond across LakeGrade
More Connecticut Lake Rankings
Other Lakes in Connecticut
Mesotrophic Lakes in Connecticut
Where this data comes from
3 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS3 samples · 2020–2021
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.