Webster Lake
Worcester County, Massachusetts1,442 acresView mapDirections
MassDEP publishes the water-quality measurements for Webster Lake. Here is what has been measured.
- Impaired · Algal growth
- Public access
- Limited data
Webster Lake in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Chlorophyll-a (algae): 3.9 µg/L. Surface area: 1442 acres.
Webster Lake is a 1,442-acre lake in Worcester County, Massachusetts. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2016-09-07. Methodology: how these readings are compared.
What Webster Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Big water1,442 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Webster Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nuisance exotic species, oxygen depletion (low DO). Check local advisories before you swim.
Whether Webster Lake 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 Webster Lake
These are the measurements MassDEP publishes for Webster Lake, 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 3.9 µg/L. TSI 44.
| 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) | 3.9µg/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. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Webster Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
1,442 acres
Public access
Yes
Listed by MassDEP
No bathymetric survey has been published for Webster Lake, so its depth is not documented here.
Recreation & Access
- Webster LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Webster Lake
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Fishing Webster Lake
Reservoir Info (USACE NID)
Webster Lake is a man-made reservoir impounded by the Webster Lake Dam (completed 1957), built primarily for recreation on the Wales Brook; earth-type dam, 15 ft tall and 100 ft long.
- Surface area
- 1,442 ac
- Normal storage
- 6,250 ac-ft
- Max storage
- 14,904 ac-ft
- Drainage area
- 10.2 sq mi
- Hazard class
- Significant
- Owner
- Webster Lake Preservation Trust, LLC
Source: USACE National Inventory of Dams, NID ID MA02924 · Operator website
EPA Impairment Status
Webster Lake 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.
Source: EPA ATTAINS assessment unit MA42064 · Official waterbody report
Nearby Lakes in Worcester County
Frequently asked questions about Webster Lake
Where is Webster Lake?
- Webster Lake 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 Webster Lake?
- Webster Lake in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Chlorophyll-a (algae): 3.9 µg/L. Surface area: 1442 acres.
Is Webster Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Webster Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nuisance exotic species, oxygen depletion (low DO). Check local advisories before you swim.
Are there boat ramps on Webster Lake?
- Webster Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Webster Lake. Public access is listed as yes.
Can I fish at Webster Lake?
- Webster Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. 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
2 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)
MASSDEP2 samples · 2016
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
Named boat-access points from the USGS National Boat Ramps inventory