Mount Tom Pond
Mount Tom Pond in Litchfield County, Connecticut has a water quality grade of D (Nutrient-rich). Phosphorus: 31 µg/L. Chlorophyll-a (algae): 5.5 µg/L.
- Type
- Eutrophic
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Mount Tom Pond →
Mount Tom Pond is a productive, nutrient-rich eutrophic lake in Litchfield County, Connecticut. Water quality is graded D based on 2 sampling years through 2023. Compared to the 11 other monitored lakes in Litchfield County, Mount Tom Pond ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-08-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus level: 31 µg/L. Chlorophyll-a: 5.5 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 31 µg/L | Poor |
| Chlorophyll-a (Algae) | 5.5 µg/L | Not graded |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Mount Tom Pond
Compare lakeside cabins, hotels, and vacation rentals near Mount Tom Pond in Litchfield County, Connecticut — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Mount Tom Pond are listed below.
Top-rated places to stay near Mount Tom Pond
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Fishing Mount Tom Pond
County Ranking
Ranked #12 of 12 lakes in Litchfield County
Nearby Lakes in Litchfield County
Frequently asked questions about Mount Tom Pond
Where is Mount Tom Pond?
- Mount Tom Pond is a lake in Litchfield County, Connecticut. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Mount Tom Pond?
- Mount Tom Pond in Litchfield County, Connecticut has a water quality grade of D (Nutrient-rich). Phosphorus: 31 µg/L. Chlorophyll-a (algae): 5.5 µg/L.
Is Mount Tom Pond safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Mount Tom Pond has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 5.5 µg/L. Always check local health department advisories before swimming.
Explore Mount Tom Pond across LakeGrade
More Connecticut Lake Rankings
Other Grade D Lakes in Connecticut
Eutrophic Lakes in Connecticut
Where this data comes from
10 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX10 samples · 2023
Analytical methods
- Total Phosphorus After Block Digestion
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- Nitrate-Nitrite Nitrogen by Colorimetry
- Turbidity by Nephelometry
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.