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Reliably-collected, scientific data support Commission management programs and help evaluate emerging threats to the water resources of the Basin.

As we always say, you can't manage what you don't measure.

• • Much of DRBC's collected data are inputted into the EPA's Water Quality Database:
    
    
  • DRBC's monitoring programs (sampling surface water, sediment and fish tissue) help to protect and restore water quality in the Basin by providing a mechanism to evaluate how water quality criteria are being met and allow for data to be assessed. Data collected serve as the foundation for the Delaware River & Bay Water Quality Assessment Reports.
    
    
  • DRBC also collects data on how water is used by various sectors (e.g., public water supply, industry, power generation) in order to evaluate water use and project trends in the Basin.

DRBC data sets can be viewed and downloaded via the , which allows users to pre-package database queries into URL’s for immediate download of project specific data. Below are links to monitoring location and analytical results for selected DRBC monitoring projects. Download of the data file will start immediately upon clicking the link.

DRBC utilizes R scripts as a way to view, analyze, and animate water quality and flow data, in addition to groundwater data for the Southeast Pennsylvania Groundwater Protected Area and New Jersey Critical Area 2.

Data analysis and graphical display using R is becoming a major innovation in water quality studies, especially for large data sets. DRBC is at the forefront of utilizing and sharing results generated by this data tool.

• • Learn More: Using Data for Water Resource Management at the Delaware River Basin Commission (pdf)
    
    
  • DRBC also serves as host of the R-Project list-serv for the

Water Quality Data

• • View graphs of dissolved oxygen levels, temperature, specific conductance, total dissolved solids, sodium and chlorides and frazil ice; these plots can be viewed at .
    
    
  • Temperature data for the upper Delaware River Basin can be viewed at .

Flow & Salt Front Data

• • View graphs of water yields for basin subwatersheds, discharge data for the mainstem Delaware and Schuylkill rivers, surface water elevation in the tidal Delaware River, salt front location prediction, cumulative rainfall for select locations and estimated percent sea water in estuary derived from boat run data; these plots can be viewed at .
    
    
  • View DRBC's Dashboard for Hydrologic Data (reservoir storage, streamflow, salt front location; updates once daily):
    
    
  • View DRBC's Salt Front Data Viewer, which allows the user to explore Delaware Estuary salt front data going back to 1964:

Groundwater Data

• • Current levels in certain monitoring wells in the Southeast Pennsylvania Groundwater Protected Area can be viewed at .
    
    
  • Current levels in certain monitoring wells in New Jersey Critical Area 2 can be viewed at .

Water Use & Projection Report (2021)

In September 2021, DRBC published a report titled Water Withdrawal and Consumptive Use Estimates for the Delaware River Basin (1990-2017) with Projections through 2060. The report analyzes 30 years of historic withdrawal data and projects withdrawal demands to the year 2060.

• • Data can be downloaded or viewed online through an application developed by DRBC staff.

Boat Run Data Explorer

• • DRBC staff developed the  interactive application that allows the user to explore Delaware Estuary water quality data collected since 1999.

SPW Data Explorer

• • DRBC staff developed the interactive application that allows the user to explore SPW water quality data collected since 2000. 

ArcGIS Map Gallery

Maps

• • DRBC Map & Graphics Gallery
    
    
  • DRBC Interactive Maps

GIS Data

• • DRBC GIS Data

SPW Atlas

• • Existing Water Quality Atlas of the Delaware River Special Protection Waters

Projecting Extreme Precipitation in the Delaware River Basin

Delaware River Basin

• • : A Product of the Academy of Natural Sciences of Drexel University
    
    
  • : a communication system that provides warning to water suppliers and industrial intake operators in the Delaware and Schuylkill River Watersheds
    
    
  • : Philadelphia's Combined Sewer Overflow (CSO) Public Notification System
    
    
  • : a daily forecast of Schuylkill River water quality in Philadelphia
    
    

U.S. EPA

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  • : Water Quality Data
    
    

USGS

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  • USGS Gage Information
    
    
  • : Water Data for the Nation
    
    
  • : a service that sends e-mail or text messages when certain USGS-measured parameters exceed thresholds.
    
    
  • (USGS NAWQA): This program, initiated in 1991 to describe the status and trends in the quality of the nation's ground and surface waters, is unique in that it integrates surface and groundwater-quality monitoring with the study of aquatic ecosystems. The USGS began the study in 1997 (link to report).

Other

Presentations

• • Using Data for Water Resource Management at the DRBC (pdf)
    
    
  • DRBC Monitoring Programs (pdf)
    
    
  • Applications for Near Real-Time and Interactive Data Assessment in the Delaware River Basin (pdf)
    
    
  • Enhancing Data Interpretation in the Delaware River Basin with R (pdf)
    
    
  • Temporally Dynamic Representations of Continuous Monitor Data through Animated Graphing (pdf)