Watershed Profile: Deer Creek in Rocks State Park

Provisional Data Graph Results Zoom to Map
 Data Sources Readme
Watershed Overview
Deer Creek beginnings in York County, PA, and flows southeast through Baltimore and Harford Counties in Maryland before entering the Susquehanna River about three miles downstream of the Conowingo Dam. The continuous instream monitoring station is located in Rocks State Park about 25 miles upstream of the confluence with the Susquehanna River.
Drainage Characteristics
  • Drainage Area (square miles): 89.98
  • Total Stream Length (miles): 170.5
  • Average Annual Flow at Station (NHD) (cfs): 120.0
  • Population (2020): 18,248
Stream Classifications (Pennsylvania)
Designation Miles
Cold Water Fisheries 50.19
Total 50.19
Stream Classifications (Maryland)
Designation Miles
Use Class III-P 105.07
Use Class IV-P 15.20
Total 120.27
  • Land Use
  • Description Percentage
    Water 0.11
    Developed Open Space 9.02
    Low Urban 2.39
    Medium Urban 0.80
    High Urban 0.29
    Barren 0.01
    Deciduous Forest 29.86
    Coniferous Forest 0.27
    Mixed Forest 5.47
    Shrub Scrub 0.71
    Grassland Herbaceous 0.17
    Pasture/Hay 16.36
    Cropland 33.97
    Wetlands 0.54
Underlying Geology
Rock Type Percentage
Other 100.00
Map
Recent Results
Sample Time 11/21/2024 5:30:00 PM
Temperature  (C) 10.1
Specific Conductivity  (mS/cm) 0.193
PH 7.41
Turbidity  (NTU+) 36.46
Dissolved Oxygen  (mg/L) 10.7
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 47
  • Surface Water 0
NPDES Discharges
Description Count
Stormwater 11
Wastewater Treatment Plant/Sewage Treatment Plant 2
Other 9
Stream Impairments
Source Category Miles
Agriculture Aquatic Life 14.21
Habitat Modification Aquatic Life 6.99
Source Unknown Aquatic Life 6.55
Urban Runoff/Storm Sewers Aquatic Life 17.89