Lake Quinsigamond
Worcester County, Massachusetts2 acresView mapDirections
MassDEP publishes the water-quality measurements for Lake Quinsigamond. Here is what has been measured.
- Impaired · Algal growth
- 37 ft max depth
- Public access
- Limited data
Lake Quinsigamond in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Chlorophyll-a (algae): 2.5 µg/L. Surface area: 1.5 acres.
Lake Quinsigamond is a 2-acre lake in Worcester County, Massachusetts with an estimated average depth of about 37 feet. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2018-07-13. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Lake Quinsigamond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, noxious aquatic plants, nuisance exotic species, oxygen depletion (low DO), pathogens (E. coli, fecal). Check local advisories before you swim.
Whether Lake Quinsigamond is safe to swim in today is a call for the Massachusetts Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Quinsigamond
These are the measurements MassDEP publishes for Lake Quinsigamond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Chlorophyll-a 2.5 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 2.5µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lake Quinsigamond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~37 ft est.
Surface area
2 acres
Public access
Yes
Listed by MassDEP
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Massachusetts has not published bathymetry for Lake Quinsigamond.
Lake Size & Watershed
Watershed (drainage) area
25 sq mi
HydroLAKES / HydroSHEDS
Shoreline
16.5 mi
HydroLAKES / HydroSHEDS
Elevation
364 ft
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.
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Fishing Lake Quinsigamond
Reservoir Info (USACE NID)
Lake Quinsigamond is a man-made reservoir impounded by the Quinsigamond Pond Dam (completed 1896), built primarily for recreation on the Blackstone River; stone-type dam, 12 ft tall and 180 ft long.
- Surface area
- 1.5 ac
- Normal storage
- 2.3 ac-ft
- Max storage
- 61.3 ac-ft
- Drainage area
- 50 sq mi
- Hazard class
- Significant
- Owner
- City of Worcester
Source: USACE National Inventory of Dams, NID ID MA00139 · Operator website
EPA Impairment Status
Lake Quinsigamond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MA51125 · Official waterbody report
Nearby Lakes in Worcester County
Frequently asked questions about Lake Quinsigamond
Where is Lake Quinsigamond?
- Lake Quinsigamond is a lake in Worcester County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.
What is the water quality of Lake Quinsigamond?
- Lake Quinsigamond in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Chlorophyll-a (algae): 2.5 µg/L. Surface area: 1.5 acres.
Is Lake Quinsigamond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Quinsigamond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, noxious aquatic plants, nuisance exotic species, oxygen depletion (low DO), pathogens (E. coli, fecal). Check local advisories before you swim.
How deep is Lake Quinsigamond?
- No published bathymetric survey covers Lake Quinsigamond, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 37 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 1.5 acres.
Can I fish at Lake Quinsigamond?
- Public access to Lake Quinsigamond is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Massachusetts's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
1 measurement from 1 monitoring station, 2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Massachusetts Department of Environmental Protection (MassDEP)
MASSDEP1 sample · 2018
Analytical methods
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)