Watershed Profile: Swatara Creek near Annville, PA

Provisional Data Graph Results Zoom to Map
 Data Sources Readme
Watershed Overview
The Swatara Creek Watershed covers parts of Berks, Schuylkill and Lebanon Counties. The creek generally flows northeast to southwest before it empties into the Susquehanna River near Middletown PA.
Drainage Characteristics
  • Drainage Area (square miles): 343.17
  • Total Stream Length (miles): 539.6
  • Average Annual Flow at Station (NHD) (cfs): 629.1
  • Population (2020): 48,208
  • Land Use
  • Description Percentage
    Water 0.49
    Developed Open Space 5.88
    Low Urban 3.53
    Medium Urban 1.41
    High Urban 0.81
    Barren 0.44
    Deciduous Forest 42.05
    Coniferous Forest 0.97
    Mixed Forest 6.11
    Shrub Scrub 0.93
    Grassland Herbaceous 1.25
    Pasture/Hay 13.31
    Cropland 21.97
    Wetlands 0.85
Underlying Geology
Rock Type Percentage
Limestone 1.52
Other 1.03
Quartzite 0.32
Sandstone 26.44
Shale 70.68
Map
Recent Results
Sample Time 4/29/2025 11:00:00 PM
Temperature  (C) 19.67
Specific Conductivity  (mS/cm) 0.252
PH 7.56
Turbidity  (NTU+) 4.93
Dissolved Oxygen  (mg/L) 8.44
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 180
  • Surface Water 2
NPDES Discharges
Description Count
Concentrated Animal Feeding Operation 17
Mining/Quarry 15
Stormwater 44
Wastewater Treatment Plant/Sewage Treatment Plant 7
Other 21
Stream Impairments
Source Category Miles
Industrial Point Source Aquatic Life 0.90
Source Unknown Potable Water Supply 4.20
On-Site Treatment Systems Aquatic Life 6.90
Urban Runoff/Storm Sewers Aquatic Life 13.70
Crop Production Aquatic Life 15.20
Habitat Modification Aquatic Life 32.10
Acid Mine Drainage Aquatic Life 56.30
Rural (Residential) Recreational 20.70
Source Unknown Recreational 129.00