Grout Pond
Windham County, VermontView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
- Mesotrophic
- Impaired · Mercury
- #6 of 9 in the county
- 15 ft max depth
Grout Pond in Windham County, Vermont has a water quality grade of B (Good). Water clarity: 8.5 ft visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 2.9 µg/L.
- Clarity
- 8.5 ft
- Max depth
- ~15 ft est.
- Type
- Mesotrophic
- Phosphorus
- 12.5 µg/L
- Chlorophyll-a
- 2.9 µg/L
- Trend
- ↓ Declining
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Stays near Grout Pond
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Watch Grout Pond’s letter
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Grout Pond is a mesotrophic lake in Windham County, Vermont with an estimated average depth of about 15 feet. Water quality is graded B based on 1 sampling years through 2024. Overall water quality is declining over recent sampling years. Compared to the 8 other monitored lakes in Windham County, Grout Pond ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2024-04-22. Grade methodology: LakeQuality methodology.
What Grout Pond is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Grout Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
Water Quality Grade: B (Good)
Moderate clarity, visible to about 8.5 ft. Phosphorus 12.5 µg/L. Chlorophyll-a 2.9 µg/L. TSI 43. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.5 ft | Not graded |
| Phosphorus | 12.5 µg/L | Good |
| Chlorophyll-a (Algae) | 2.9 µg/L | Not graded |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~15 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Vermont has not published bathymetry for Grout 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.
Recreation & Access
Public campgrounds near Grout Pond
- Grout Pond0.8 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fishing Grout Pond
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.087 m/yr | 4 |
| Phosphorus | ↓ Declining | +0.92 µg/L/yr | 4 |
EPA Impairment Status
Grout Pond 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 VT12-03L01 · Official waterbody report
County Ranking
Ranked #6 of 9 lakes in Windham County
Nearby Lakes in Windham County
Frequently asked questions about Grout Pond
Where is Grout Pond?
- Grout Pond is a lake in Windham County, Vermont. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Grout Pond?
- Grout Pond in Windham County, Vermont has a water quality grade of B (Good). Water clarity: 8.5 ft visibility. Phosphorus: 12.5 µg/L. Chlorophyll-a (algae): 2.9 µg/L.
Is Grout Pond safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Grout Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
How deep is Grout Pond?
- No published bathymetric survey covers Grout Pond, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 15 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there campgrounds on Grout Pond?
- Grout Pond has 1 public campground from USGS The National Map within 5 km, including Grout Pond. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Grout Pond across LakeQuality
More Vermont Lake Rankings
Other Grade B Lakes in Vermont
Mesotrophic Lakes in Vermont
Where this data comes from
85 measurements from 2 monitoring stations, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ85 samples · 2020–2024
Analytical methods
- 4500 P H ~ Manual Digestion and Flow Injection Analysis for Total Phosphorus
- EPA approved Alternate Test Procedure for 4500 P H. Has a 28 day hold without acid preservation.
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
- 2120 B ~ Color in Water by Visual Comparison
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)
Public campgrounds from USGS The National Map Structures, within about 3 miles