Onondaga County Lake Quality
New York, 9 lakes — no lake here has enough monitoring data for a grade
Onondaga County holds 9 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. No lake in Onondaga County has enough sampling behind it for an A–F grade yet. The 9 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.
Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.
Where to stay near Onondaga County
Top-rated places to stay near Onondaga County
Prices for Sep 11–13, 4 adults. Change dates on the map below.
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 Onondaga County?
Get lake water-quality report cards plus the best cabin & lodging deals near Onondaga County — straight to your inbox. No spam, unsubscribe anytime.
Quick Answers for Onondaga County
Planning a trip? Check special fishing regulations for Otisco Lake — or check the official New York fishing regulations.
All Lakes in Onondaga County
9 lakes · 0 graded, 9 not rated0 graded lakes · 9 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NROtisco LakeOnondaga | NR | 5.2 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRCrooked LakeOnondaga | NR | 12.6 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRSkaneateles LakeOnondaga | NR | 27.4 ft | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRJamesville ReservoirOnondaga | NR | 5.3 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NROnondaga LakeOnondaga | NR | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRMud PondOnondaga | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRRound LakeOnondaga | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRGreen LakeOnondaga | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRGreen LakeOnondaga | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in New York
See how Onondaga County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.