Lake Beseck
Lake Beseck in Middlesex County, Connecticut has a water quality grade of D (Nutrient-rich). Phosphorus: 46 µg/L. Chlorophyll-a (algae): 31.7 µg/L. Surface area: 116 acres.
- Area
- 116 acres
- Type
- Eutrophic
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Lake Beseck →
Lake Beseck is a 116-acre productive, nutrient-rich eutrophic lake in Middlesex County, Connecticut. Water quality is graded D based on 2 sampling years through 2022. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 4 other monitored lakes in Middlesex County, Lake Beseck ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-07-28. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus level: 46 µg/L. Chlorophyll-a: 31.7 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 46 µg/L | Poor |
| Chlorophyll-a (Algae) | 31.7 µg/L | Not graded |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Beseck
Compare lakeside cabins, hotels, and vacation rentals near Lake Beseck in Middlesex 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Lake Beseck are listed below.
Top-rated places to stay near Lake Beseck
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 116 acres |
| Public Access | Yes |
No bathymetric survey has been published for Lake Beseck, so its depth is not documented here.
Recreation & Access
- Beseck LakePublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Lake Beseck
Reservoir Info (USACE NID)
Lake Beseck is a man-made reservoir impounded by the Lake Beseck Dam (completed 1846), built primarily for recreation on the Ellen Doyle Brook; masonry-type dam, 34 ft tall and 300 ft long.
- Surface area
- 116 ac
- Normal storage
- 1,256 ac-ft
- Max storage
- 2,089 ac-ft
- Drainage area
- 2.05 sq mi
- Hazard class
- Significant
- Owner
- Connecticut DEEP
Source: USACE National Inventory of Dams, NID ID CT00381 · Operator website
EPA Impairment Status
Lake Beseck is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit CT4607-10-1-L1_01 · Official waterbody report · Matched by proximity (0.28 km)
County Ranking
Ranked #5 of 5 lakes in Middlesex County
Nearby Lakes in Middlesex County
Frequently asked questions about Lake Beseck
Where is Lake Beseck?
- Lake Beseck is a lake in Middlesex County, Connecticut. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Beseck?
- Lake Beseck in Middlesex County, Connecticut has a water quality grade of D (Nutrient-rich). Phosphorus: 46 µg/L. Chlorophyll-a (algae): 31.7 µg/L. Surface area: 116 acres.
Is Lake Beseck safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Lake Beseck has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 31.7 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Lake Beseck?
- Lake Beseck has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Beseck Lake. Public access is listed as yes.
Explore Lake Beseck across LakeGrade
More Connecticut Lake Rankings
Other Grade D Lakes in Connecticut
Eutrophic Lakes in Connecticut
Where this data comes from
10 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX10 samples · 2022
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
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory