Watershed Profile ReadMe

Each watershed profile contains background information for the contributing drainage area for a Continuous Instream Monitoring station.  These data should be used for educational purposes only.  

Last Update:  April 2025

Drainage Area (square miles)
* SRBC CWUAS Tool, USGS 10 meter National Elevation Dataset (NED), USGS High Resolution National Hydrography Dataset (NHD)

Population (total)
* 2020 US Census block groups
	ArcMap shapefile (blckgrp_srb20)

Total Stream Length (miles)
* 2024 National Hydrography Dataset NHD Flowline layer with spatial representation of water uses defined in Title 25 Environmental Protection, Department of Environmental Protection, Chapter 93, Water Quality Standards.
	GIS dataset (Ch93_Desig)
* 2024 Water Quality Classifications of Title 5 of the official compilation of Codes, Rules, and Regulations of the State of New York
	GIS dataset (WtrClass_NY)
* 2019 Water Quality Standards, Maryland Department of the Environment
	GIS dataset (WtrClass_MD)

Maryland Water Quality Standards, Use Class Designations (miles)
* 2019 Water Quality Standards, Maryland Department of the Environment
	GIS dataset (WtrClass_MD)

New York Stream Classifications (miles)
* 2024 Water Quality Classifications of Title 5 of the official compilation of Codes, Rules, and Regulations of the State of New York
	GIS dataset (WtrClass_NY)

Pennsylvania Stream Classifications, Designated Uses (miles)
* 2024 National Hydrography Dataset NHD Flowline layer with spatial representation of water uses defined in Title 25 Environmental Protection, Department of Environmental Protection, Chapter 93, Water Quality Standards.
	GIS dataset (Ch93_Desig)

Average Annual Flow at Station (USGS NHD) (cfs)
* Google Earth - WATERS
	NHDPlus Watershed Characterization Report tool

Maximum Flow Time from Headwaters
* Google Earth - WATERS
	Upstream Downstream Search tool; streams used in this tool are from USGS NHD

Land Use (percentage)
* 2021 USGS National Land Cover Database (NLCD)
	GIS raster (nlcd19srbc)

Natural Gas Pads (total)
* 2025 Susquehanna River Basin Commission (SRBC) HYDRA Database, active and approved Approval By Rule (ABR) permits

Natural Gas Water Withdrawals (total)
* 2025 SRBC HYDRA Database, active and approved surface water and groundwater withdrawals

Public Water Supply Withdrawals (total)
* 2023 PA Public Water Supplies, PADEP Pennsylvania Drinking Water Information System (PADWIS)
* 2022 NY Public Water Supplies, New York State Department of Health (NYSDOH)
	GIS datasets (SRB_PWSGW and SRB_PWSSW)

NPDES Discharges (total)
* 2024 Environmental Protection Agency (EPA) Facility Registry System (FRS) National Pollutant Discharge Elimination System (NPDES) Discharges
	GIS dataset (npdes)

Stream Impairments (miles)
* 2024 PA Integrated List, Non-attaining Streams
	GIS dataset (ImpStr)
* 2024 NY Priority Waterbodies List
	GIS dataset (NY_ImpPWL)
* 2020-2022 MD Integrated Report
	GIS dataset (MD_ImpStr)
NOTE - Multiple assessments and sources of impairment can exist for the same stream segment.
 
Underlying Geology (percentage)
* 2015 Geology by Rock Type for the Susquehanna River Basin based on 1999 New York Geology (NYS Museum and NYS Geologic Survey) and 2001 Bedrock Geology of PA (PA DCNR, Bureau of Topographic and Geologic Survey)   
	GIS dataset (bedrock)