Amos Lake
Amos Lake in New London County, Connecticut has a water quality grade of C (Fair). Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 4.3 µg/L.
- Type
- Mesotrophic
Amos Lake is a mesotrophic lake in New London County, Connecticut. Water quality is graded C based on 2 sampling years through 2024. Compared to the 9 other monitored lakes in New London County, Amos Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-07-09. 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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
No clarity data. Phosphorus level: 27.5 µg/L. Chlorophyll-a: 4.3 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 27.5 µg/L | Fair |
| Chlorophyll-a (Algae) | 4.3 µg/L | Not graded |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Amos Lake
Compare lakeside cabins, hotels, and vacation rentals near Amos Lake in New London 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 Amos Lake
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Fishing Amos Lake
EPA Impairment Status
Amos Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit CT3002-02-1-L2_01 · Official waterbody report · Matched by proximity (0.13 km)
County Ranking
Ranked #7 of 10 lakes in New London County
Nearby Lakes in New London County
Frequently asked questions about Amos Lake
Where is Amos Lake?
- Amos Lake is a lake in New London County, Connecticut. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Amos Lake?
- Amos Lake in New London County, Connecticut has a water quality grade of C (Fair). Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 4.3 µg/L.
Is Amos Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Amos Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 4.3 µg/L. Always check local health department advisories before swimming.
Explore Amos Lake across LakeGrade
More Connecticut Lake Rankings
Other Grade C Lakes in Connecticut
Mesotrophic Lakes in Connecticut
Where this data comes from
36 measurements from 1 monitoring station, 2022–2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX36 samples · 2022–2024
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database