Water Quality Data Sets

DRBC's monitoring programs 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.

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

Data collected through various DRBC monitoring programs also serve as the foundation for the Delaware River & Bay Water Quality Asessment Reports.

DRBC collects data via sampling surface water, sediment, and fish tissue.

Download Data Sets for Select DRBC Monitoring Projects

DRBC data sets can be viewed and downloaded via the National Water Quality Portal, 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.

Project Description


DRBC Contact

Location Data Download

Analytical Results Data Download

Lower Delaware Existing Water Quality Monitoring*




Analytical Results

Lehigh Watershed Nutrient Monitoring in Support of QUAL2K Model




Analytical Results

Scenic Rivers Monitoring Program (Upper and Middle Delaware)*




Analytical Results

Brodhead Watershed Nutrient Monitoring in Support of QUAL2K Model




Analytical Results

Delaware Estuary Water Quality Monitoring Program (Boat Run)




Analytical Results

*These data are also compiled in the Existing Water Quality Atlas of the Delaware River Special Protection Waters.

Water Quality Data Explorer Applications

DRBC staff developed the Delaware Estuary Water Quality Monitoring Program (Boat Run) Data Explorer interactive application that allows the user to explore Delaware Estuary water quality data collected from 1999-2016.

DRBC staff developed the DRBC SPW Monitoring Program Data Explorer interactive application that allows the user to explore SPW water quality data collected from 2000-2016. 

Using R Scripts for Select Water Resource Data

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

Examples of water quality data that are graphically displayed include dissolved oxygen, temperature, total dissolved solids, and sodium and chlorides; these plots can be viewed at http://drbc.net/Sky/waterq.htm

Examples of flow data that are graphically displayed include water yields for basin subwatersheds, discharge data for the mainstem Delaware and Schuylkill rivers, and surface water elevation in the tidal Delaware River; these plots can be viewed at http://drbc.net/Sky/flows.htm.

Current levels in certain monitoring wells in the Southeast Pennsylvania Groundwater Protected Area can be viewed at https://drbc.net/Sky/sepagwpa.htm.

Current levels in certain monitoring wells in New Jersey Critical Area 2 can be viewed at https://drbc.net/Sky/nj2.htm.

DRBC also serves as host of the R-Project list-serv for the National Water Quality Monitoring Council.

Other WQ Data/Info Links

Delaware River Watershed Initiative Water Quality Mapper: A Product of the Academy of Natural Sciences of Drexel University

Delaware Valley Early Warning System: a communication system that provides warning to water suppliers and industrial intake operators in the Delaware and Schuylkill River Watersheds.

National Environmental Methods Index 

National Water Quality Monitoring Council (NWQMC) 

Philadelphia Water Department CSOcast: Philadelphia's Combined Sewer Overflow (CSO) Public Notification System

Philly Rivercast: a daily forecast of Schuylkill River water quality in Philadelphia.

U.S. EPA's Non-Point Source Pollution Web Site

U.S. EPA's Storage and Retrieval (STORET) Database: Water Quality Data

U.S. EPA's Water Resources Web Site

USGS Delaware River Dashboard

USGS National Water Information System (NWIS) Database: Water Data for the Nation

USGS National Water Quality Assessment Program (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 Delaware River Basin NAWQA study in 1997 (link to report).

USGS Next Generation Water Observing System: Delaware River Basin

USGS WaterAlert: a service that sends e-mail or text messages when certain USGS-measured parameters exceed thresholds.

WikiWatershed: Delaware River Watershed Initiative