1st Program Term

Regional Stormwater Monitoring Program

During the first program term, seven municipalities (Dallas, Fort Worth, Arlington, Irving, Garland, Plano, and Mesquite) and two local districts of TxDOT received joint approval from the U.S. Environmental Protection Agency (EPA) for a regional monitoring program which utilized the assistance of a shared consultant team and the United States Geological Survey (USGS) to sample and analyze 22 outfalls primarily from small watersheds of a predominantly single land use type.


Cities of Dallas, Fort Worth, Arlington, Irving, Plano, Garland, and Mesquite, and two transportation agencies—Texas Department of Transportation-Dallas District and North Texas Tollway Authority

Sampling Details

A network of 30 monitoring sites was negotiated with EPA Region 6. The 30 sites represented single, predominant area land uses. From 1992 through 1994, 210 storm events were sampled for 188 constituents. The data were used for the NPDES stormwater permit application process. The initial data were analyzed for improving the program and finding cost effectiveness.

The resulting analysis determined that several sites could be discontinued and several of the 188 constituents were never detected and could therefore be dropped from the monitoring list. The regional program went forward with a new set of parameters and monitoring locations. From 1997 through 2001, over 330 samples were collected from a 22 site network for 33 constituents.

Interactive station map and data viewer

Monitoring watersheds map [PDF]

For more sampling details, visit the following links:

Monitoring Reports

Final Regional Stormwater Monitoring Report [PDF]
Evaluation of the Municipal Stormwater Monitoring Network, 1992–2000, USGS [PDF]
Statistical Analysis of TxDOT Highway Stormwater Runoff [PDF] 

Reports are available upon request. Please contact NCTCOG Staff at EandD@nctcog.org.