Watershed Profile: West Branch Susquehanna River near Milton, PA

Watershed Overview
The West Branch Susquehanna River originates in northern Cambria County, PA. The West Branch flows north, east, and then south through 6 counties before its confluence with the Susquehanna River north of Sunbury, PA. The monitoring station is located several miles above the confluence with the Susquehanna River near Milton, PA.
Drainage Characteristics
  • Drainage Area (square miles): 6,680.55
  • Total Stream Length (miles): 12,007.50
  • Average Annual Flow at Station (NHD) (cfs): 11,373.50
  • Population (2010): 442,706
Stream Classifications (Pennsylvania)
Designation Miles
Cold Water Fisheries 4054.31
Exceptional Value 1495.66
High-Quality Cold Water Fisheries 5090.50
High-Quality Trout Stocked Fisheries 79.30
Trout Stocked Fisheries 370.24
Warm Water Fisheries 917.49
Total 12007.50
  • Land Use
  • Description Percentage
    Water 0.32
    Developed Open Space 4.19
    Low Urban 0.96
    Medium Urban 0.30
    High Urban 0.11
    Barren 0.65
    Deciduous Forest 52.73
    Coniferous Forest 3.19
    Mixed Forest 22.95
    Shrub Scrub 1.80
    Grassland Herbaceous 0.90
    Pasture/Hay 7.55
    Cropland 3.31
    Wetlands 0.80
Underlying Geology
Rock Type Percentage
Dolomite 1.47
Limestone 2.55
Quartzite 1.03
Sandstone 73.93
Shale 21.01
Recent Results
Sample Time 12/1/2022 2:00:00 AM
Temperature  (C) 5.12
Specific Conductivity  (mS/cm) 0.154
PH 7.66
Turbidity  (NTU+) 8.85
Dissolved Oxygen  (mg/L) 13.28
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 597
  • Natural Gas Water Withdrawals 31
Public Water Supply Withdrawals
  • Groundwater 1259
  • Surface Water 95
NPDES Discharges
Description Count
Concentrated Animal Feeding Operation 19
Mining/Quarry 120
Stormwater 157
Wastewater Treatment Plant/Sewage Treatment Plant 200
Other 465
Stream Impairments
Source Category Miles
Acid Mine Drainage Aquatic Life 1939.71
Agriculture Aquatic Life 272.23
Atmospheric Deposition Aquatic Life 188.33
Channelization Aquatic Life 9.98
Crop Production Aquatic Life 27.73
Dam or Impoundment Aquatic Life 25.01
Erosion from Derelict Land Aquatic Life 13.18
Golf Courses Aquatic Life 5.30
Grazing in Riparian Zones Aquatic Life 57.64
Habitat Modification Aquatic Life 19.34
Highway/Road/Bridge Runoff Aquatic Life 99.92
Highways, Roads, Bridges Construction Aquatic Life 2.14
Dam or Impoundment Aquatic Life 15.55
Industrial Point Source Aquatic Life 7.00
Municipal Point Source Aquatic Life 5.48
Natural Sources Aquatic Life 5.26
On-Site Treatment Systems Aquatic Life 25.69
Removal of Vegetation Aquatic Life 15.59
Rural (Residential) Aquatic Life 84.34
Source Unknown Aquatic Life 3.29
Streambank Modifications Aquatic Life 4.71
Surface Mining Aquatic Life 3.37
Urban Runoff/Storm Sewers Aquatic Life 34.17
Source Unknown Fish Consumption 104.60
Source Unknown Potable Water Supply 1.80
Source Unknown Recreational 385.70