Beseck Lake
Beseck Lake in Middlesex County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.1 ft visibility. Surface area: 116 acres.
- Clarity
- 4.1 ft
- Area
- 116 acres
Why Beseck 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 Beseck Lake, 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.
Beseck Lake is a 116-acre lake in Middlesex County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-10-06. 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 Beseck Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 4.1 ft. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.1 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Beseck Lake
Compare lakeside cabins, hotels, and vacation rentals near Beseck Lake 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.
Top-rated places to stay near Beseck Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 116 acres |
No bathymetric survey has been published for Beseck Lake, so its depth is not documented here.
Fishing Beseck Lake
Reservoir Info (USACE NID)
Beseck Lake 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
Beseck Lake 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 (0.2 km)
Graded lakes near Beseck Lake
Beseck Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Middlesex County
Frequently asked questions about Beseck Lake
Where is Beseck Lake?
- Beseck Lake is a lake in Middlesex 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 Beseck Lake?
- Beseck Lake in Middlesex County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.1 ft visibility. Surface area: 116 acres.
Is Beseck Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Beseck Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Beseck Lake across LakeGrade
More Connecticut Lake Rankings
Other Lakes in Connecticut
Eutrophic Lakes in Connecticut
Where this data comes from
44 measurements from 3 monitoring stations, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS30 samples · 2021–2022 - CT DEEP Volunteer Water Monitoring Program (Volunteer)
CTVOLMON14 samples · 2022
Monitoring station identifiers (3)
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