Powers Lake
Powers Lake in New London County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 1.1 µg/L. Surface area: 146.5 acres.
- Area
- 147 acres
- Public access
- Yes
Why Powers Lake 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 Powers Lake, 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.
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. 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 Powers Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 9 µg/L. Chlorophyll-a: 1.1 µg/L. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 9 µg/L | Not graded |
| Chlorophyll-a (Algae) | 1.1 µg/L | Not graded |
| Trophic State Index (TSI) | 34 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Powers Lake
Compare lakeside cabins, hotels, and vacation rentals near Powers Lake 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 Powers Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 147 acres |
| Public Access | Yes |
No bathymetric survey has been published for Powers Lake, so its depth is not documented here.
Recreation & Access
- Powers LakePublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
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
Graded lakes near Powers Lake
Powers Lake has no grade, but these lakes within a short drive do.
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. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Powers Lake?
- Powers Lake in New London County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 1.1 µg/L. Surface area: 146.5 acres.
Is Powers Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Powers Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 1.1 µg/L. Always check local health department advisories before swimming.
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.
Explore Powers Lake across LakeGrade
More Connecticut Lake Rankings
Other Lakes in Connecticut
Oligotrophic Lakes in Connecticut
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)
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.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory