Unk Lake
Middlesex County, ConnecticutView mapDirections
CT DEEP publishes the water-quality measurements for Unk Lake. Here is what has been measured.
- Limited data
Unk Lake in Middlesex County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 28 µg/L. Chlorophyll-a (algae): 13.6 µg/L.
Unk Lake is a lake in Middlesex County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-07-12. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Unk Lake is safe to swim in today is a call for the Connecticut Department of Energy and Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Unk Lake
These are the measurements CT DEEP publishes for Unk Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 28 µg/L. Chlorophyll-a 13.6 µg/L. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 28µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 13.6µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Nearby Lakes in Middlesex County
Frequently asked questions about Unk Lake
Where is Unk Lake?
- Unk Lake is a lake in Middlesex County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Unk Lake?
- Unk Lake in Middlesex County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Phosphorus: 28 µg/L. Chlorophyll-a (algae): 13.6 µg/L.
Is Unk Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
4 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX4 samples · 2022
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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.