Powers Lake
New London County, Connecticut147 acresView mapDirections
CT DEEP publishes the water-quality measurements for Powers Lake. Here is what has been measured.
- Public access
- Limited data
Powers Lake in New London County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 1.1 µg/L. Surface area: 146.5 acres.
Powers Lake is a 147-acre lake in New London County, Connecticut. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-07-18. Methodology: how these readings are compared.
What Powers Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Powers Lake 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 Powers Lake
These are the measurements CT DEEP publishes for Powers Lake, 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 9 µg/L. Chlorophyll-a 1.1 µg/L. TSI 34.
| 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 | 9µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 1.1µg/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. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Powers Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
147 acres
Public access
Yes
Listed by CT DEEP
No bathymetric survey has been published for Powers Lake, so its depth is not documented here.
Recreation & Access
- Powers LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Powers Lake
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Fishing Powers Lake
Reservoir Info (USACE NID)
Powers Lake is a man-made reservoir impounded by the Powers Lake Dam (completed 1870), built primarily for recreation on the Pataguanset River; masonry-type dam, 25 ft tall and 315 ft long.
- Surface area
- 146.5 ac
- Normal storage
- 1,068 ac-ft
- Max storage
- 1,068 ac-ft
- Drainage area
- 0.96 sq mi
- Hazard class
- Significant
- Owner
- Connecticut DEEP
Source: USACE National Inventory of Dams, NID ID CT00155 · Operator website
Nearby Lakes in New London County
Frequently asked questions about Powers Lake
Where is Powers Lake?
- Powers Lake 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 Powers Lake?
- Powers Lake in New London County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 1.1 µg/L. Surface area: 146.5 acres.
Is Powers Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Powers Lake?
- Powers Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Powers Lake. Public access is listed as yes.
Can I fish at Powers Lake?
- Powers Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. 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.
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Where this data comes from
7 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX7 samples · 2023
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.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory