Dr. Norbert Jaworski participated in many of the early water quality monitoring programs on the tidal Potomac River, when data and results were recorded only in hard copy reports. After his retirement from U.S. EPA, Dr. Jaworski computerized those and other data of that time and combined them with recent data to produce a record stretching back to 1895. The treatise he wrote provides a broad, 110-year perspective of landscape loadings and resulting water quality trends in the Potomac River basin and its estuary through 2005.

The Potomac River Basin and its Estuary: Landscape Loadings and Water Quality Trends, 1895-2005, known as “The Treatise,” can be downloaded by chapter:

• Front Cover and Table of Contents
• Chapter 1: Introduction
• Chapter 2: Water Quality Trends of the Upper Basin
• Chapter 3: Sources of Landscape Inputs to the Upper Basin
• Chapter 4: Nutrients (including SO4 and Cl), Riverine Export Fluxes, and River Concentration Relationships with Landscape Loading Inputs
• Chapter 5: Estuary Loadings from Wastewater Discharges Directly into the Tidal Waters, Direct Air Deposition onto the Tidal Waters, and Riverine Export
• Chapter 6: Estuary Water and Sediment Quality Trends
• Chapter 7: Factors Affecting the Impact of Nutrient Enrichment on the Lower Estuary
• Chapter 8: Nutrient Dynamics, Depletion, and Replenishment
• Chapter 9: Summary of How and Why the Water Quality of the Potomac River and its Estuary Have Changes over the Past 100 Years
• Appendix A: Possible Nutrient Management Strategies, Acknowledgements
• Epilogue