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toxic loading photo identifier

Control of Toxic Chemicals in Puget Sound

Phase 1: Initial estimates

This study provided us with initial toxic chemical loading estimates for the following five of the nine main pathways:

  • Surface runoff
  • Atmospheric deposition
  • Wastewater discharges
  • Combined sewer overflows
  • Spills directly to surface water

When we added up the contributions from select chemicals of concern across all the pathways to Puget Sound, surface runoff (both river inputs and stormwater) was the dominant pathway contributing millions of pounds of toxic chemicals per year.

The eight other pathways were likely still important for particular chemicals and geographic areas.

Phase 1 also identified data gaps where we needed more information.

Go to the clickable timeline

Go to the clickable timeline