Conesus Lake is a mesotrophic lake in Livingston County, New York. Water quality is graded B based on 1 sampling years through 2020. The lake supports 2 documented fish species including Tiger Muskellunge and Walleye. Compared to the 1 other monitored lakes in Livingston County, Conesus Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-28. Grade methodology: LakeGrade methodology.
Watch Conesus Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 10.7 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.7 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Conesus Lake
Compare lakeside cabins, hotels, and vacation rentals near Conesus Lake in Livingston County, New York — 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 Conesus Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Conesus Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Conesus Lake — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at New York’s top lakes →
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Conesus Lake
Current Conditions
Latest reading Jul 6, 2026, 4:45 AM from USGS gauge 04227980. See live data ↗ — readings update every 15–60 minutes; this page refreshes on each build.
Location
County Ranking
Ranked #1 of 2 lakes in Livingston County
Nearby Lakes in Livingston County
Explore Conesus Lake across LakeGrade
Fish species and top-graded lakes across New York
Fish species and best lakes in Livingston County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Finger Lakes area
Where to stay at New York's top lakes, each with its grade
Moderate nutrients, good water quality
New York's cleanest and most-polluted lakes, ranked
More New York Lake Rankings
Other Grade B Lakes in New York
Mesotrophic Lakes in New York
More records, surveys & data sources
EPA Impairment Status
Conesus Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NY0402-0004 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Conesus Lake under Clean Water Act (NPDES) discharge permits.
- Cambier PropertyConesus · 1.7 mi away · NPDES NY0245747
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-28
Monitoring stations: 1