Watershed Profile: Susquehanna River near Danville, PA

Watershed Overview
The Susquehanna River begins at the outflow of Otsego Lake in Cooperstown, NY. The River flows 444 miles through New York, Pennsylvania and Maryland, before reaching its confluence with the Chesapeake Bay in Havre de Grace, MD. The monitoring station is in the Middle Susquehanna Subbasin near Danville, PA.
Drainage Characteristics
  • Drainage Area (square miles): 11222.41
  • Total Stream Length (miles): 19602.0
  • Average Annual Flow at Station (NHD) (cfs): 16721.5
  • Population (2020): 1,359,665
Stream Classifications (Pennsylvania)
Designation Miles
Cold Water Fisheries 4985.17
Exceptional Value 184.08
High-Quality Cold Water Fisheries 1202.60
Trout Stocked Fisheries 654.14
Warm Water Fisheries 1385.03
Total 8411.02
Stream Classifications (New York)
Classification Use Miles
Class A Drinking Water Source 154.69
Class A (T) Drinking Water Source With Trout Population 33.94
Class A (TS) Drinking Water Source With Trout Spawning 24.49
Class AA Drinking Water Source 31.09
Class AA (T) Drinking Water Source With Trout Population 7.13
Class AA (TS) Drinking Water Source With Trout Spawning 3.08
Class B Contact Recreation (Not Drinking Water Source) 369.04
Class B (T) Contact Recreation With Trout Population 53.09
Class C Support Fisheries (Non-Contact) 7630.29
Class C (T) Support Fisheries, Non-Contact With Trout Population 1990.31
Class C (TS) Support Fisheries, Non-Contact With Trout Spawning 884.85
Class D Fishing, But Does Not Support Fish Propagation 8.98
Exempt Exempt 0.03
Total 11191.01
  • Land Use
  • Description Percentage
    Water 1.03
    Developed Open Space 5.24
    Low Urban 1.82
    Medium Urban 1.10
    High Urban 0.42
    Barren 0.25
    Deciduous Forest 39.69
    Coniferous Forest 3.36
    Mixed Forest 17.16
    Shrub Scrub 0.77
    Grassland Herbaceous 0.47
    Pasture/Hay 21.03
    Cropland 4.30
    Wetlands 3.36
Underlying Geology
Rock Type Percentage
Limestone 1.44
Sandstone 28.74
Shale 69.82
Recent Results
Sample Time 6/13/2024 12:45:00 AM
Temperature  (C) 22
Specific Conductivity  (mS/cm) 0.314
PH 12.73
Turbidity  (NTU+) 31.57
Dissolved Oxygen  (mg/L) 7.36
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 1348
  • Natural Gas Water Withdrawals 69
Public Water Supply Withdrawals
  • Groundwater 3765
  • Surface Water 156
NPDES Discharges
Description Count
Concentrated Animal Feeding Operation 81
Mining/Quarry 255
Stormwater 550
Wastewater Treatment Plant/Sewage Treatment Plant 178
Other 476
Stream Impairments
Source Category Miles
Source Unknown Fish Consumption 270.40
Atmospheric Deposition Fish Consumption 698.00
Acid Mine Drainage Potable Water Supply 0.70
Source Unknown Recreational 732.80
Urban Runoff/Storm Sewers Recreational 21.70
Agriculture Recreational 22.50
On-Site Treatment Systems Recreational 52.60
Combined Sewer Overflows Recreational 11.70
Municipal Point Source Recreational 16.30
Acid Mine Drainage Aquatic Life 382.40
Agriculture Aquatic Life 238.90
Animal Feeding Operations Aquatic Life 1.82
Atmospheric Deposition Aquatic Life 157.20
Channel Erosion/Incision from Upstream Hydromodifications Aquatic Life 17.30
Channelization Aquatic Life 20.87
Coal Mining Aquatic Life 0.90
Combined Sewer Overflows Aquatic Life 0.40
Crop Production Aquatic Life 10.09
Dam or Impoundment Aquatic Life 24.30
Erosion from Derelict Land Aquatic Life 4.26
Forest Roads Aquatic Life 1.90
Golf Courses Aquatic Life 3.48
Habitat Modification Aquatic Life 57.50
Highway/Road/Bridge Runoff Aquatic Life 157.00
Highways, Roads, Bridges Construction Aquatic Life 1.75
Impacts from Hydrostructure Flow Regulation Aquatic Life 5.05
Impervious Surface/Parking Lot Runoff Aquatic Life 21.00
Landfills Aquatic Life 1.81
Municipal Point Source Aquatic Life 33.90
Natural Sources Aquatic Life 9.40
Removal of Vegetation Aquatic Life 10.70
Rural (Residential) Aquatic Life 9.25
Silviculture Aquatic Life 6.41
Site Clearance Aquatic Life 4.82
Source Unknown Aquatic Life 9.10
Streambank Modifications Aquatic Life 0.95
Urban Runoff/Storm Sewers Aquatic Life 79.70