White Island Pond
Plymouth County, Massachusetts322 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
- 36 ft max depth
- Limited data
White Island Pond in Plymouth 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: 322 acres.
- Max depth
- ~36 ft est.
- Area
- 322 acres
- Chlorophyll-a
- 12.8 µg/L
- Trend
- ↑ Improving
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Watch White Island Pond’s letter
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Why White Island Pond 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 White Island Pond, 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.
White Island Pond is a 322-acre lake in Plymouth County, Massachusetts with an estimated average depth of about 36 feet. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2014-09-16. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. White Island Pond is listed impaired under Clean Water Act §303(d) (IR 4C) for algal growth, nuisance exotic species. Check local advisories before you swim.
Water quality measurements for White Island Pond
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 | ~36 ft est. |
| Average Depth | ~7 ft est. |
| Surface Area | 322 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Massachusetts has not published bathymetry for White Island Pond.
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 White Island Pond
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Chlorophyll-a | ↑ Improving | -4.46 µg/L/yr | 4 |
Reservoir Info (USACE NID)
White Island Pond is a man-made reservoir impounded by the White Island Pond Dam, built primarily for irrigation on the Red Brook; earth-type dam, 11 ft tall and 90 ft long.
- Surface area
- 322 ac
- Normal storage
- 1,550 ac-ft
- Max storage
- 2,550 ac-ft
- Drainage area
- 2.79 sq mi
- Hazard class
- Significant
- Owner
- MA Department of Fish and Game
Source: USACE National Inventory of Dams, NID ID MA00037 · Operator website
EPA Impairment Status
White Island Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MA95166 · Official waterbody report · Matched by proximity (0.43 km)
Graded lakes near White Island Pond
White Island Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Plymouth County
Frequently asked questions about White Island Pond
Where is White Island Pond?
- White Island Pond is a lake in Plymouth 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 White Island Pond?
- White Island Pond in Plymouth 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: 322 acres.
Is White Island Pond safe to swim in?
- The letter is not a swimming clearance. White Island Pond is listed impaired under Clean Water Act §303(d) (IR 4C) for algal growth, nuisance exotic species. Check local advisories before you swim.
How deep is White Island Pond?
- No published bathymetric survey covers White Island Pond, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 36 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 322 acres.
Explore White Island Pond across LakeQuality
Planning a trip around Cape Cod?
White Island Pond is about 31 miles from Cape Cod National Seashore. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Cape Cod →More Massachusetts Lake Rankings
Other Lakes in Massachusetts
Eutrophic Lakes in Massachusetts
Where this data comes from
20 measurements from 2 monitoring stations, 2012–2014. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Massachusetts Department of Environmental Protection (MassDEP)
MASSDEP20 samples · 2012–2014
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)