Beach Pond
New London County, Connecticut459 acresView mapDirections
CT DEEP publishes the water-quality measurements for Beach Pond. Here is what has been measured.
- Oligotrophic
- Public access
- Limited data
Beach Pond in New London County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 5 µg/L. Chlorophyll-a (algae): 1.6 µg/L. Surface area: 459 acres.
Beach Pond is a 459-acre cold, clear oligotrophic lake in New London County, Connecticut. Limited fish-species data available. Public access is available. Compared to the 9 other monitored lakes in New London County, Beach Pond ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-08-07. 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 Beach 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 Beach Pond
These are the measurements CT DEEP publishes for Beach 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 5 µg/L. Chlorophyll-a 1.6 µg/L. TSI 31.
| 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 | 5µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 1.6µg/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. | 31 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Beach Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
459 acres
Public access
Yes
Listed by CT DEEP
No bathymetric survey has been published for Beach Pond, so its depth is not documented here.
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Fishing Beach Pond
Reservoir Info (USACE NID)
Beach Pond is a man-made reservoir impounded by the Beach Pond Dam (completed 1885), built primarily for recreation on the Pachaug River; earth-type dam, 12 ft tall and 350 ft long.
- Surface area
- 459 ac
- Normal storage
- 4,100 ac-ft
- Max storage
- 5,800 ac-ft
- Drainage area
- 4.98 sq mi
- Hazard class
- Significant
- Owner
- Connecticut DEEP
Source: USACE National Inventory of Dams, NID ID CT00628 · Operator website
Nearby Lakes in New London County
Frequently asked questions about Beach Pond
Where is Beach Pond?
- Beach Pond is a lake in New London County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Beach Pond?
- Beach Pond in New London County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 5 µg/L. Chlorophyll-a (algae): 1.6 µg/L. Surface area: 459 acres.
Is Beach Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Beach Pond?
- Public access to Beach Pond is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Connecticut's fish and wildlife agency, so check its current regulations before you go.
Explore Beach Pond across LakeQuality
More lakes in Connecticut
Other Lakes in Connecticut
Oligotrophic Lakes in Connecticut
Where this data comes from
32 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_WQX32 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.