Unk Lake
Unk Lake in Middlesex County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 28 µg/L. Chlorophyll-a (algae): 13.6 µg/L.
Why Unk Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Unk Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Unk Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 28 µg/L. Chlorophyll-a: 13.6 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 28 µg/L | Not graded |
| Chlorophyll-a (Algae) | 13.6 µg/L | Not graded |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Unk Lake
Compare lakeside cabins, hotels, and vacation rentals near Unk Lake in Middlesex 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.
Top-rated places to stay near Unk Lake
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Fishing Unk Lake
Graded lakes near Unk Lake
Unk Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Middlesex County
Frequently asked questions about Unk Lake
Where is Unk Lake?
- Unk Lake is a lake in Middlesex County, Connecticut. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Unk Lake?
- Unk Lake in Middlesex County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 28 µg/L. Chlorophyll-a (algae): 13.6 µg/L.
Is Unk Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Unk Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 13.6 µg/L. Always check local health department advisories before swimming.
Explore Unk Lake across LakeGrade
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Other Lakes in Connecticut
Eutrophic Lakes in Connecticut
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)
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.