Plymouth Reservoir
Chenango County, WisconsinLimited DataEutrophic
Plymouth Reservoir is a 77-acre productive, nutrient-rich eutrophic lake in Chenango County, NY. Water quality is graded D based on 1 sampling years through 2020. Compared to the 6 other monitored lakes in Chenango County, Plymouth Reservoir ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2020-09-12. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 6.2 ft. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.2 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 77 acres |
Location
County Ranking
Ranked #6 of 7 lakes in Chenango County
Nearby Lakes in Chenango County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Plymouth Reservoir is a man-made reservoir impounded by the Plymouth Reservoir Dam (completed 1827), built primarily for recreation on the RESERVOIR CREEK; rockfill-type dam, 12 ft tall and 150 ft long.
- Surface area
- 77 ac
- Normal storage
- 320 ac-ft
- Max storage
- 400 ac-ft
- Drainage area
- 1.05 sq mi
- Hazard class
- Significant
- Owner
- PLYMOUTH RESERVOIR ASSOCIATION
Source: USACE National Inventory of Dams, NID ID NY01481 · Operator website
EPA Impairment Status
Plymouth Reservoir 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 NY0602-0014 · Official waterbody report
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-12
Monitoring stations: 1