Watershed Profile: Mill Creek on Big Hollow Road

Provisional Data Graph Results Zoom to Map
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Watershed Overview
Mill Creek is located within the Loyalsock State Forest in Sullivan County with the exception of a small portion of the headwaters in Lycoming County. It flows southeast until confluence with Loyalsock Creek.
Drainage Characteristics
  • Drainage Area (square miles): 7.20
  • Total Stream Length (miles): 10.4
  • Average Annual Flow at Station (NHD) (cfs): 10.6
  • Population (2020): 58
Stream Classifications (Pennsylvania)
Designation Miles
High-Quality Cold Water Fisheries 10.42
Total 10.42
  • Land Use
  • Description Percentage
    Developed Open Space 4.23
    Low Urban 0.04
    Medium Urban 0.02
    Deciduous Forest 73.16
    Coniferous Forest 0.66
    Mixed Forest 18.93
    Shrub Scrub 1.04
    Grassland Herbaceous 0.14
    Pasture/Hay 0.01
    Wetlands 1.75
Underlying Geology
Rock Type Percentage
Sandstone 100.00
Map
Recent Results
Sample Time 10/28/2025 8:00:00 AM
Temperature  (C) 6.93
Specific Conductivity  (mS/cm) 0.054
PH 7.22
Turbidity  (NTU+) 2.08
Dissolved Oxygen  (mg/L) 11.98
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 0
  • Natural Gas Water Withdrawals 0
Public Water Supply Withdrawals
  • Groundwater 0
  • Surface Water 0
NPDES Discharges
Description Count
Concentrated Animal Feeding Operation 0
Mining/Quarry 0
Stormwater 0
Wastewater Treatment Plant/Sewage Treatment Plant 0
Other 0
Stream Impairments