Indian Lake
Worcester County, Massachusetts233 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
- 50 ft max depth
- Public access
- Limited data
Indian Lake in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Chlorophyll-a (algae): 12.8 µg/L. Surface area: 233 acres.
- Max depth
- ~50 ft est.
- Area
- 233 acres
- Chlorophyll-a
- 12.8 µg/L
- Public access
- Yes
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Watch Indian Lake’s letter
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Why Indian 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 Indian 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.
Indian Lake is a 233-acre lake in Worcester County, Massachusetts with an estimated average depth of about 50 feet. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2018-07-13. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Indian Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nuisance exotic species, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
Water quality measurements for Indian Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Chlorophyll-a 12.8 µg/L. TSI 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 12.8 µg/L | Not graded |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~50 ft est. |
| Average Depth | ~18 ft est. |
| Surface Area | 233 acres |
| 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 Indian Lake.
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.
Fishing Indian Lake
Reservoir Info (USACE NID)
Indian Lake is a man-made reservoir impounded by the Indian Lake Dam (completed 1920), built primarily for flood risk reduction on the Tributary to Weasel Brook; earth-type dam, 17 ft tall and 370 ft long.
- Surface area
- 233 ac
- Normal storage
- 1,800 ac-ft
- Max storage
- 2,800 ac-ft
- Drainage area
- 5.64 sq mi
- Hazard class
- Significant
- Owner
- MA Department of Transportation
All listed purposes: Flood Risk Reduction;Recreation.
Source: USACE National Inventory of Dams, NID ID MA00125 · Operator website
EPA Impairment Status
Indian Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MA51073 · Official waterbody report
Graded lakes near Indian Lake
Indian Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Worcester County
Frequently asked questions about Indian Lake
Where is Indian Lake?
- Indian 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 Indian Lake?
- Indian Lake in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Chlorophyll-a (algae): 12.8 µg/L. Surface area: 233 acres.
Is Indian Lake safe to swim in?
- The letter is not a swimming clearance. Indian Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nuisance exotic species, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
How deep is Indian Lake?
- No published bathymetric survey covers Indian Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 50 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 233 acres.
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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)
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)