Windsor Lake
Berkshire County, Massachusetts25 acresView mapDirections
Nutrients and algae sit mid-range for this region.
↓ down from B at the last regrade
- Eutrophic
- Impaired · Algal growth
- #7 of 8 in the county
- Public access
- Limited data
Windsor Lake in Berkshire County, Massachusetts has a water quality grade of C (Fair). Chlorophyll-a (algae): 7.5 µg/L. Surface area: 25 acres.
- Area
- 25 acres
- Type
- Eutrophic
- Chlorophyll-a
- 7.5 µg/L
- Public access
- Yes
Stays via Stay22
Stays near Windsor Lake
Compare lakeside cabins, hotels, and vacation rentals near Windsor Lake in Berkshire County, Massachusetts — 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 Windsor Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Massachusetts’s top lakes →
Watch Windsor Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Windsor Lake is a 25-acre productive, nutrient-rich eutrophic lake in Berkshire County, Massachusetts. Water quality is graded C based on 1 sampling years through 2016. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 7 other monitored lakes in Berkshire County, Windsor Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2016-09-07. Grade methodology: LakeQuality methodology.
What Windsor Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
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.
The C is nutrients and algae, not a swimming clearance. Windsor Lake is listed impaired under Clean Water Act §303(d) (IR 4C) for algal growth. Check local advisories before you swim.
Water Quality Grade: C (Fair)
No clarity data. Chlorophyll-a 7.5 µg/L. TSI 50. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 7.5 µg/L | Fair |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 25 acres |
| Public Access | Yes |
No bathymetric survey has been published for Windsor Lake, so its depth is not documented here.
Recreation & Access
- Windsor LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Windsor Lake
Reservoir Info (USACE NID)
Windsor Lake is a man-made reservoir impounded by the Windsor Lake Dam (completed 1883), built primarily for recreation on the Tributary to Hoosic River; earth-type dam, 20 ft tall and 375 ft long.
- Surface area
- 25 ac
- Normal storage
- 105 ac-ft
- Max storage
- 185 ac-ft
- Drainage area
- 0.44 sq mi
- Hazard class
- High
- Owner
- City of North Adams
Source: USACE National Inventory of Dams, NID ID MA00281 · Operator website
EPA Impairment Status
Windsor Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Source: EPA ATTAINS assessment unit MA11016 · Official waterbody report
County Ranking
Ranked #7 of 8 lakes in Berkshire County
Nearby Lakes in Berkshire County
Frequently asked questions about Windsor Lake
Where is Windsor Lake?
- Windsor Lake is a lake in Berkshire County, Massachusetts. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Windsor Lake?
- Windsor Lake in Berkshire County, Massachusetts has a water quality grade of C (Fair). Chlorophyll-a (algae): 7.5 µg/L. Surface area: 25 acres.
Is Windsor Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Windsor Lake is listed impaired under Clean Water Act §303(d) (IR 4C) for algal growth. Check local advisories before you swim.
Are there boat ramps on Windsor Lake?
- Windsor Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Windsor Lake. Public access is listed as yes.
Explore Windsor Lake across LakeQuality
2 documented falls within 13.8 mi, nearest Tannery Falls
6.4 mi away · recorded at 75°F
Species activity outlook by water temperature and season
Where to stay at Massachusetts's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
Massachusetts's cleanest and most-polluted lakes, ranked
More Massachusetts Lake Rankings
Other Grade C Lakes in Massachusetts
Eutrophic Lakes in Massachusetts
Where this data comes from
3 measurements from 1 monitoring station, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Massachusetts Department of Environmental Protection (MassDEP)
MASSDEP3 samples · 2016
Analytical methods
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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