Pennsylvania Real-time Water Quality

Real-time computed concentrations of water-quality constituents such as suspended sediment, total nitrogen, and total phosphorus are calculated using ordinary least squares regression models. The results of these models, along with direct water-quality measurements, can be viewed here as time-series graphs, or downloaded as tabular data.

Ordinary least squares regression models on this site use conventional sensor measurements (for example, discharge, temperature, pH, specific conductance, turbidity, and dissolved oxygen) to compute concentrations and loads of other water-quality constituents in real time. This makes it possible to compute instantaneous values of many constituents in real time for public safety without the lengthy time delay of collecting a sample and waiting for analysis of a sample at a laboratory.

Please select a site from below to start viewing data. You also can read more about the methods, measured constituents, and disclaimers by using the navigation bar at the top of each page.

Map Legend

	Continuous Water-Quality Gage
	Discontinued Continuous Water-Quality Gage

Station Name	Station Identifier	County	Computation Period
Brandywine Creek at Chadds Ford, PA	01481000	Delaware	Jan 2015 to Present
East Branch Brandywine Creek below Downingtown, PA	01480870	Chester	Jan 2015 to Present
French Creek near Phoenixville, PA	01472157	Chester	Jan 2015 to Present
Red Clay Creek near Kennett Square, PA	01479820	Chester	Jan 2015 to Present
Valley Creek at PA Turnpike Bridge near Valley Forge, PA	01473169	Chester	Jan 2007 to Present
West Branch Brandywine Creek at Modena, PA	01480617	Chester	Jan 2015 to Present
West Branch Brandywine Creek near Honey Brook, PA	01480300	Chester	Jan 2007 to Present
White Clay Creek near Strickersville, PA	01478245	Chester	Jan 2015 to Present