West Lake
New Haven County, Connecticut20 acresView mapDirections
CT DEEP publishes the water-quality measurements for West Lake. Here is what has been measured.
- Limited data
West Lake in New Haven County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Water clarity: 5.2 ft visibility. Surface area: 20.2 acres.
West Lake is a 20-acre lake in New Haven County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-02-27. 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 West 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 West Lake
These are the measurements CT DEEP publishes for West Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5.2 ft. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading 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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about West Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
20 acres
No bathymetric survey has been published for West Lake, so its depth is not documented here.
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Fishing West Lake
Reservoir Info (USACE NID)
West Lake is a man-made reservoir impounded by the Clear Lake Dam, built primarily for other, 10 ft tall and 800 ft long.
- Surface area
- 20.2 ac
- Normal storage
- 100 ac-ft
- Max storage
- 150 ac-ft
- Drainage area
- 1 sq mi
- Hazard class
- Significant
- Owner
- Clear Lake Improvement Association
Source: USACE National Inventory of Dams, NID ID CT01936 · Operator website · Matched by proximity (0.42 km)
Nearby Lakes in New Haven County
Frequently asked questions about West Lake
Where is West Lake?
- West Lake is a lake in New Haven County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of West Lake?
- West Lake in New Haven County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Water clarity: 5.2 ft visibility. Surface area: 20.2 acres.
Is West 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
5 measurements from 2 monitoring stations, 2021–2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS3 samples · 2021–2024 - CT DEEP Volunteer Water Monitoring Program (Volunteer)
CTVOLMON2 samples · 2022
Monitoring station identifiers (2)
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.