Watershed Profile: Chemung River at West Elmira, NY

Provisional Data Graph Results Zoom to Map
 Data Sources Readme
Watershed Overview
The Chemung River begins where the Cohocton and Tioga Rivers come together in Painted Post, NY. The Chemung River flows southeast until its confluence with the Susquehanna River in Athens, PA. The monitoring station is near the town of West Elmira in Chemung County, NY.
Drainage Characteristics
  • Drainage Area (square miles): 2147.49
  • Total Stream Length (miles): 3514.6
  • Average Annual Flow at Station (NHD) (cfs): 2274.6
  • Population (2020): 132,179
Stream Classifications (Pennsylvania)
Designation Miles
Cold Water Fisheries 498.91
High-Quality Cold Water Fisheries 5.66
Trout Stocked Fisheries 170.32
Warm Water Fisheries 397.78
Total 1072.67
Stream Classifications (New York)
Classification Use Miles
Class A Drinking Water Source 40.93
Class A (T) Drinking Water Source With Trout Population 8.76
Class A (TS) Drinking Water Source With Trout Spawning 3.03
Class AA Drinking Water Source 0.47
Class AA (TS) Drinking Water Source With Trout Spawning 3.08
Class B Contact Recreation (Not Drinking Water Source) 2.94
Class B (T) Contact Recreation With Trout Population 0.72
Class C Support Fisheries (Non-Contact) 2080.37
Class C (T) Support Fisheries, Non-Contact With Trout Population 154.54
Class C (TS) Support Fisheries, Non-Contact With Trout Spawning 142.55
Class D Fishing, But Does Not Support Fish Propagation 4.45
Exempt Exempt 0.03
Total 2441.87
  • Land Use
  • Description Percentage
    Water 0.62
    Developed Open Space 5.16
    Low Urban 1.28
    Medium Urban 0.57
    High Urban 0.17
    Barren 0.15
    Deciduous Forest 38.82
    Coniferous Forest 2.89
    Mixed Forest 18.79
    Shrub Scrub 0.47
    Grassland Herbaceous 0.36
    Pasture/Hay 23.10
    Cropland 5.77
    Wetlands 1.86
Underlying Geology
Rock Type Percentage
Sandstone 20.87
Shale 79.12
Map
Recent Results
Sample Time 4/30/2025 1:00:00 AM
Temperature  (C) -99999.99
Specific Conductivity  (mS/cm) -99999.99
PH -99999.99
Turbidity  (NTU+) -99999.99
Dissolved Oxygen  (mg/L) -99999.99
Dissolved Oxygen (last month of readings)
pH (last month of readings)
Specific Conductivity (last month of readings)
Temperature (last month of readings)
Turbidity (last month of readings)
Natural Gas
  • Natural Gas Pads 213
  • Natural Gas Water Withdrawals 18
Public Water Supply Withdrawals
  • Groundwater 308
  • Surface Water 8
NPDES Discharges
Description Count
Concentrated Animal Feeding Operation 2
Mining/Quarry 20
Stormwater 37
Wastewater Treatment Plant/Sewage Treatment Plant 31
Other 45
Stream Impairments
Source Category Miles
Coal Mining Aquatic Life 0.90
Streambank Modifications Aquatic Life 1.00
Golf Courses Aquatic Life 3.50
Urban Runoff/Storm Sewers Aquatic Life 3.60
Removal of Vegetation Aquatic Life 7.90
Source Unknown Fish Consumption 10.60
Dam or Impoundment Aquatic Life 11.70
Acid Mine Drainage Potable Water Supply 16.20
Channel Erosion/Incision from Upstream Hydromodifications Aquatic Life 17.30
Impervious Surface/Parking Lot Runoff Aquatic Life 21.00
Highway/Road/Bridge Runoff Aquatic Life 26.50
Atmospheric Deposition Aquatic Life 49.20
Acid Mine Drainage Aquatic Life 53.20
Habitat Modification Aquatic Life 57.50
Agriculture Aquatic Life 68.50
Source Unknown Recreational 153.20