Congamond Lakes
Hartford County, MassachusettsView mapDirections
Nutrients and algae run above the regional average.
↓ down from C at the last regrade
- Eutrophic
- Impaired · Nuisance exotic species
- #1 of 1 in the county
- 47 ft max depth
- Public access
- Limited data
Congamond Lakes in Hartford County, Massachusetts has a water quality grade of D (Nutrient-rich). Chlorophyll-a (algae): 19.4 µg/L.
- Max depth
- ~47 ft est.
- Type
- Eutrophic
- Chlorophyll-a
- 19.4 µg/L
- Public access
- Yes
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Stays near Congamond Lakes
Compare lakeside cabins, hotels, and vacation rentals near Congamond Lakes in Hartford 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Congamond Lakes are listed below.
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Congamond Lakes is a productive, nutrient-rich eutrophic lake in Hartford County, Massachusetts with an estimated average depth of about 47 feet. Water quality is graded D based on 1 sampling years through 2016. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2016-09-14. Grade methodology: LakeQuality methodology.
What Congamond Lakes 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 D is nutrients and algae, not a swimming clearance. Congamond Lakes is listed impaired under Clean Water Act §303(d) (IR 5) for nuisance exotic species, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
No clarity data. Chlorophyll-a 19.4 µg/L. TSI 60. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 19.4 µg/L | Poor |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~47 ft est. |
| Average Depth | ~15 ft est. |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Massachusetts has not published bathymetry for Congamond Lakes.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Congamond Lakes (South Ramp)Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Congamond Lakes
Reservoir Info (USACE NID)
Congamond Lakes is a man-made reservoir impounded by the Congamond Lake Middle Pond Culvert Outlet on the Great Brook, 9 ft tall.
- Normal storage
- 1,350 ac-ft
- Max storage
- 5,105 ac-ft
- Hazard class
- Undetermined
- Owner
- Town of Southwick
Source: USACE National Inventory of Dams, NID ID MA00071 · Operator website · Matched by proximity (0.72 km)
EPA Impairment Status
Congamond Lakes 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 MA32023 · Official waterbody report
County Ranking
Ranked #1 of 1 lakes in Hartford County
Nearby Lakes in Hartford County
Frequently asked questions about Congamond Lakes
Where is Congamond Lakes?
- Congamond Lakes is a lake in Hartford County, Massachusetts. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Congamond Lakes?
- Congamond Lakes in Hartford County, Massachusetts has a water quality grade of D (Nutrient-rich). Chlorophyll-a (algae): 19.4 µg/L.
Is Congamond Lakes safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Congamond Lakes is listed impaired under Clean Water Act §303(d) (IR 5) for nuisance exotic species, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
How deep is Congamond Lakes?
- No published bathymetric survey covers Congamond Lakes, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 47 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Congamond Lakes?
- Congamond Lakes has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Congamond Lakes (South Ramp). Public access is listed as yes.
Explore Congamond Lakes across LakeQuality
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Where this data comes from
6 measurements from 2 monitoring stations, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Massachusetts Department of Environmental Protection (MassDEP)
MASSDEP6 samples · 2016
Analytical methods
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (2)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory