Guilford Lake is a 74-acre cold, clear oligotrophic lake in Chenango County, New York. Water quality is graded B based on 1 sampling years through 2020. The lake supports 3 documented fish species including Brook Trout, Brown Trout, and Rainbow Trout. Compared to the 6 other monitored lakes in Chenango County, Guilford Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, New York DNR, last sampled 2020-09-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 13.8 ft. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.8 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 74 acres |
Where to stay near Guilford Lake
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Guilford Lake
Location
County Ranking
Ranked #3 of 7 lakes in Chenango County
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Low nutrients, clear water, excellent for swimming
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Reservoir Info (USACE NID)
Guilford Lake is a man-made reservoir impounded by the Guilford Lake Dam (completed 1827), built primarily for water supply on the GUILFORD CREEK; earth-type dam, 15 ft tall and 62 ft long.
- Surface area
- 74 ac
- Normal storage
- 390 ac-ft
- Max storage
- 560 ac-ft
- Drainage area
- 2.23 sq mi
- Hazard class
- High
- Owner
- TOWN OF GUILFORD
Source: USACE National Inventory of Dams, NID ID NY01483 · Operator website
EPA Impairment Status
Guilford Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit NY0601-0012 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-27
Monitoring stations: 1