Webster Lake
Worcester County, Massachusetts1,442 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Algal growth
- Public access
- Limited data
Webster Lake in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Chlorophyll-a (algae): 3.9 µg/L. Surface area: 1442 acres.
- Area
- 1,442 acres
- Chlorophyll-a
- 3.9 µg/L
- Public access
- Yes
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Watch Webster Lake’s letter
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Why Webster Lake has no grade
We grade a lake only when the monitoring record supports a letter: 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 Webster Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded algae (chlorophyll-a), but not water clarity and phosphorus.
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 MassDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. Grade methodology: LakeQuality methodology.
What Webster Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Big water1,442 acres
Swimming Safety
Not ratedLimited data
The letter is 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.
Water quality measurements for Webster Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Chlorophyll-a 3.9 µg/L. TSI 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 3.9 µg/L | Not graded |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,442 acres |
| Public Access | Yes |
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
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
Source: EPA ATTAINS assessment unit MA42064 · Official waterbody report
Graded lakes near Webster Lake
Webster Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Worcester County
Frequently asked questions about Webster Lake
Where is Webster Lake?
- Webster Lake is a lake in Worcester County, Massachusetts. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Webster Lake?
- Webster Lake in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Chlorophyll-a (algae): 3.9 µg/L. Surface area: 1442 acres.
Is Webster Lake safe to swim in?
- The letter is 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.
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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)
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