Proposed Wissahickon Creek Phosphorus TMDL

On May 20, 2015, EPA released a draft total phosphorus TMDL for the Wissahickon Creek Watershed in southeastern Pennsylvania.  The TMDL will establish reductions necessary to address the poor stream health caused by excessive total phosphorus from wastewater treatment plants, stormwater runoff, and other sources.  The public comment period was open from May 20, 2015 to July 30, 2015, and a public meeting was held on June 10, 2015.  Below are documents comprising the draft total phosphorus TMDL.  Additional resources can be found by clicking the links below or from the Impaired Waters and TMDLs in Region 3 homepage.

• Comments received on proposed Wissahickon Creek TMDL
• Other files provided during proposed Wissahickon Creek TMDL public comment period

• Draft Total Phosphorus TMDL for Wissahickon Creek Watershed, Pennsylvania (pdf) (2.91 MB)
• Appendix A Wissahickon Creek Observed Data Report (pdf) (697.32 KB)
• Appendix B: De Minimis Point Sources of Total Phosphorus (pdf) (154.62 KB)
• Appendix C: Watershed Model Calibration Results (pdf) (3.12 MB)
• Appendix D: EFDC Model Calibration (pdf) (2.02 MB)
• Appendix E: MS4 Land Use and WLAs (pdf) (1.99 MB)
• Reference Paper (2007) - Development of Nutrient Endpoints (pdf) (621.21 KB)
• Reference Paper (2012) - Development of Nutrient Endpoints Follow-up Analysis (pdf) (948.86 KB)
• Evaluation of Nutrients as a Stressor of Aquatic Life in Wissahickon Creek, PA - Corrected (pdf) (1.71 MB)