Lake Naraneka
Fairfield County, Connecticut55 acresView mapDirections
CT DEEP publishes the water-quality measurements for Lake Naraneka. Here is what has been measured.
- Limited data
Lake Naraneka in Fairfield County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Water clarity: 4.9 ft visibility. Surface area: 55 acres.
Lake Naraneka is a 55-acre lake in Fairfield County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-10-25. 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 Lake Naraneka 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 Lake Naraneka
These are the measurements CT DEEP publishes for Lake Naraneka, 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 4.9 ft. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.9ft | 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. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Naraneka
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
55 acres
No bathymetric survey has been published for Lake Naraneka, so its depth is not documented here.
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Fishing Lake Naraneka
Reservoir Info (USACE NID)
Lake Naraneka is a man-made reservoir impounded by the Lake Naraneka Dam (completed 1937), built primarily for recreation on the Shadow Brok Titicus River; concrete-type dam, 18 ft tall and 156 ft long.
- Surface area
- 55 ac
- Normal storage
- 490 ac-ft
- Max storage
- 677 ac-ft
- Drainage area
- 0.46 sq mi
- Hazard class
- Significant
- Owner
- Twixt Hills Homeowners Assoc., Inc.
Source: USACE National Inventory of Dams, NID ID CT00223 · Operator website
Nearby Lakes in Fairfield County
Frequently asked questions about Lake Naraneka
Where is Lake Naraneka?
- Lake Naraneka is a lake in Fairfield County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Lake Naraneka?
- Lake Naraneka in Fairfield County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Water clarity: 4.9 ft visibility. Surface area: 55 acres.
Is Lake Naraneka 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
47 measurements from 3 monitoring stations, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- CT DEEP Volunteer Water Monitoring Program (Volunteer)
CTVOLMON42 samples · 2024–2025 - North American Lake Management Society
NALMS5 samples · 2024
Monitoring station identifiers (3)
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.