Watershed Profile: Susquehanna River near Danville, PA

Provisional Data Graph Results Zoom to Map
 Data Sources Readme
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): 19600.2
  • Average Annual Flow at Station (NHD) (cfs): 16721.5
  • Population (2020): 1,359,665
Stream Classifications (Pennsylvania)
Designation Miles
Cold Water Fisheries 4977.15
Exceptional Value 184.08
High-Quality Cold Water Fisheries 1208.73
Trout Stocked Fisheries 654.14
Warm Water Fisheries 1385.03
Total 8409.13
Stream Classifications (New York)
Classification Use Miles
Class A Drinking Water Source 154.70
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) 7630.30
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 11191.03
  • Land Use
  • Description Percentage
    Water 1.01
    Developed Open Space 5.23
    Low Urban 1.83
    Medium Urban 1.10
    High Urban 0.43
    Barren 0.27
    Deciduous Forest 39.85
    Coniferous Forest 3.39
    Mixed Forest 17.23
    Shrub Scrub 0.51
    Grassland Herbaceous 0.47
    Pasture/Hay 21.02
    Cropland 4.28
    Wetlands 3.38
Underlying Geology
Rock Type Percentage
Limestone 1.44
Sandstone 28.74
Shale 69.82
Map
Recent Results
Sample Time 4/30/2025 12:45:00 AM
Temperature  (C) 15.93
Specific Conductivity  (mS/cm) 0.221
PH 12.56
Turbidity  (NTU+) 21.83
Dissolved Oxygen  (mg/L) 9
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 1344
  • Natural Gas Water Withdrawals 78
Public Water Supply Withdrawals
  • Groundwater 2549
  • Surface Water 70
NPDES Discharges
Description Count
Concentrated Animal Feeding Operation 30
Mining/Quarry 376
Stormwater 445
Wastewater Treatment Plant/Sewage Treatment Plant 189
Other 352
Stream Impairments
Source Category Miles
Combined Sewer Overflows Aquatic Life 0.40
Streambank Modifications Aquatic Life 1.00
Highways, Roads, Bridges Construction Aquatic Life 1.70
Animal Feeding Operations Aquatic Life 1.80
Landfills Aquatic Life 1.80
Forest Roads Aquatic Life 1.90
Golf Courses Aquatic Life 3.50
Erosion from Derelict Land Aquatic Life 4.30
Source Unknown Aquatic Life 4.40
Site Clearance Aquatic Life 4.80
Impacts from Hydrostructure Flow Regulation Aquatic Life 5.10
Coal Mining Aquatic Life 5.20
Silviculture Aquatic Life 6.40
Natural Sources Aquatic Life 8.70
Rural (Residential) Aquatic Life 9.20
Crop Production Aquatic Life 10.10
Removal of Vegetation Aquatic Life 10.70
Combined Sewer Overflows Recreational 11.70
Acid Mine Drainage Potable Water Supply 16.20
Channel Erosion/Incision from Upstream Hydromodifications Aquatic Life 17.30
Municipal Point Source Aquatic Life 17.60
Channelization Aquatic Life 20.90
Impervious Surface/Parking Lot Runoff Aquatic Life 21.00
Urban Runoff/Storm Sewers Recreational 21.70
Dam or Impoundment Aquatic Life 24.30
On-Site Treatment Systems Recreational 52.60
Habitat Modification Aquatic Life 57.50
Rural (Residential) Recreational 62.50
Urban Runoff/Storm Sewers Aquatic Life 79.40
Highway/Road/Bridge Runoff Aquatic Life 157.00
Atmospheric Deposition Aquatic Life 157.20
Source Unknown Fish Consumption 270.40
Acid Mine Drainage Aquatic Life 393.80
Atmospheric Deposition Fish Consumption 693.70
Source Unknown Recreational 717.80