Chenango County Lake Quality
New York, 7 lakes, average grade B (Good)
Chenango County has 7 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. With an average grade of B, Chenango County sits comfortably above the New York median.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lake Petonia (A); the most-stressed is Truitt Pond (F).
Quick Answers for Chenango County
Planning a trip? Check special fishing regulations for Lake Petonia — or check the official New York fishing regulations.
Fishing in Chenango County
All Lakes in Chenango County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Petonia | A | 20.2 ft | - |
| 2 | Chenango Lake | A | 16.6 ft | - |
| 3 | Guilford Lake | B | 13.8 ft | - |
| 4 | Warn Lake | B | 14.1 ft | - |
| 5 | Genegantslet Lake | B | 12 ft | - |
| 6 | Plymouth Reservoir | D | 6.2 ft | - |
| 7 | Truitt Pond | F | 3.2 ft | - |
Other Counties in New York
See how Chenango County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
Where to stay near Chenango County
Top-rated places to stay near Chenango County
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Source: EPA National Aquatic Resource Surveys, 2026.